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* Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2010-04-07
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip: x86: Fix double enable_IR_x2apic() call on SMP kernel on !SMP boards x86: Increase CONFIG_NODES_SHIFT max to 10 ibft, x86: Change reserve_ibft_region() to find_ibft_region() x86, hpet: Fix bug in RTC emulation x86, hpet: Erratum workaround for read after write of HPET comparator bootmem, x86: Fix 32bit numa system without RAM on node 0 nobootmem, x86: Fix 32bit numa system without RAM on node 0 x86: Handle overlapping mptables x86: Make e820_remove_range to handle all covered case x86-32, resume: do a global tlb flush in S4 resume
| * bootmem, x86: Fix 32bit numa system without RAM on node 0Yinghai Lu2010-04-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When 32bit numa is used, free_all_bootmem() will still only go over with node id 0. If node 0 doesn't have RAM installed, the lowest populated node becomes low RAM. This one fixes BOOTMEM path by iterating over the bdata_list. -v3: add more comments, and fix bootmem path too. -v4: seperate from one big patch Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4BB416D7.6090203@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * nobootmem, x86: Fix 32bit numa system without RAM on node 0Yinghai Lu2010-04-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On one system without RAM on node0, got following boot dump with a 32 bit NUMA kernel: early_node_map[4] active PFN ranges 1: 0x00000010 -> 0x00000099 1: 0x00000100 -> 0x0007da00 1: 0x0007e800 -> 0x0007ffa0 1: 0x0007ffae -> 0x0007ffb0 ... Subtract (29 early reservations) #000 [0000001000 - 0000002000] #001 [0000089000 - 000008f000] #002 [0000091000 - 0000093500] ... #027 [007cbfef40 - 007e800000] #028 [007e9ca000 - 007ff95000] (0 free memory ranges) Initializing HighMem for node 0 (00000000:00000000) Initializing HighMem for node 1 (00000000:00000000) Memory: 0k/2096832k available (6662k kernel code, 2096300k reserved, 4829k data, 484k init, 0k highmem) ... Checking if this processor honours the WP bit even in supervisor mode...Ok. swapper: page allocation failure. order:0, mode:0x0 Pid: 0, comm: swapper Not tainted 2.6.34-rc3-tip-03818-g4b1ea6c-dirty #35 Call Trace: [<4087a5dc>] ? printk+0xf/0x11 [<40286728>] __alloc_pages_nodemask+0x417/0x487 [<402a9ce1>] new_slab+0xe2/0x1fe [<402aa5b2>] kmem_cache_open+0x185/0x358 [<402abbc0>] T.954+0x1c/0x60 [<40d52a29>] kmem_cache_init+0x24/0x113 [<40d39738>] start_kernel+0x166/0x2e4 [<40d3940e>] ? unknown_bootoption+0x0/0x18e [<40d390ce>] i386_start_kernel+0xce/0xd5 Mem-Info: Node 1 DMA per-cpu: CPU 0: hi: 0, btch: 1 usd: 0 Node 1 Normal per-cpu: CPU 0: hi: 0, btch: 1 usd: 0 active_anon:0 inactive_anon:0 isolated_anon:0 active_file:0 inactive_file:0 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 free:0 slab_reclaimable:0 slab_unreclaimable:0 mapped:0 shmem:0 pagetables:0 bounce:0 When 32bit NUMA is used, free_all_bootmem() will still only go over with node id 0. If node 0 doesn't have RAM installed, We need to go with node1 because early_node_map still use 1 for all ranges, and ram from node1 become low ram. Use MAX_NUMNODES like 64-bit NUMA does. Note: BOOTMEM path has the same problem. this bug exist before We have NO_BOOTMEM support. -v3: add more comments, and fix bootmem path too. -v4: seperate bootmem path fix Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4BB41689.9090502@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-30
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* x86: Remove excessive early_res debug outputJiri Kosina2010-03-24
| | | | | | | | | | | | | | | | | | | | | Commit 08677214e318297 ("x86: Make 64 bit use early_res instead of bootmem before slab") introduced early_res replacement for bootmem, but left code in __free_pages_memory() which dumps all the ranges that are beeing freed, without any additional information, causing some noise in dmesg during bootup. Just remove printing of the ranges, that doesn't provide anything useful anyway. While at it, remove other commented-out KERN_DEBUG messages in the NO_BOOTMEM code as well. Signed-off-by: Jiri Kosina <jkosina@suse.cz> Found-OK-by: Andrew Morton <akpm@linux-foundation.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <alpine.LNX.2.00.1003220931360.18642@pobox.suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: Make 64 bit use early_res instead of bootmem before slabYinghai Lu2010-02-12
| | | | | | | | | | | | | Finally we can use early_res to replace bootmem for x86_64 now. Still can use CONFIG_NO_BOOTMEM to enable it or not. -v2: fix 32bit compiling about MAX_DMA32_PFN -v3: folded bug fix from LKML message below Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4B747239.4070907@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* mm/bootmem.c: properly __init-annotate helper functionsJan Beulich2009-12-15
| | | | | | | Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: Add free_bootmem_late()FUJITA Tomonori2009-11-10
| | | | | | | | | | | | | | | | | | | | | | | | | Add a new function for freeing bootmem after the bootmem allocator has been released and the unreserved pages given to the page allocator. This allows us to reserve bootmem and then release it if we later discover it was not needed. ( This new API will be used by the swiotlb code to recover a significant amount of RAM (64MB). ) Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com Cc: muli@il.ibm.com Cc: hannes@cmpxchg.org Cc: tj@kernel.org Cc: akpm@linux-foundation.org Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1257849980-22640-7-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* kmemleak: Do not report alloc_bootmem blocks as leaksCatalin Marinas2009-08-27
| | | | | | | | | | This patch sets the min_count for alloc_bootmem objects to 0 so that they are never reported as leaks. This is because many of these blocks are only referred via the physical address which is not looked up by kmemleak. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi>
* kmemleak: Add callbacks to the bootmem allocatorCatalin Marinas2009-07-08
| | | | | | | | | | | This patch adds kmemleak_alloc/free callbacks to the bootmem allocator. This would allow scanning of such blocks and help avoiding a whole class of false positives and more kmemleak annotations. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
* bootmem.c: avoid c90 declaration warningJoe Perches2009-06-19
| | | | | | | | | | | [akpm@linux-foundation.org: cleanup] Signed-off-by: Joe Perches <joe@perches.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Tejun Heo <tj@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: fix slab fallback on numaPekka Enberg2009-06-11
| | | | | | | | | | | If the user requested bootmem allocation on a specific node, we should use kzalloc_node() for the fallback allocation. Cc: Ingo Molnar <mingo@elte.hu> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
* bootmem: use slab if bootmem is no longer availablePekka Enberg2009-06-11
| | | | | | | | | | | | | | | As a preparation for initializing the slab allocator early, make sure the bootmem allocator does not crash and burn if someone calls it after slab is up; otherwise we'd need a flag day for switching to early slab. Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Matt Mackall <mpm@selenic.com> Cc: Nick Piggin <npiggin@suse.de> Cc: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
* bootmem, x86: further fixes for arch-specific bootmem wrappingTejun Heo2009-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: fix new breakages introduced by previous fix Commit c132937556f56ee4b831ef4b23f1846e05fde102 tried to clean up bootmem arch wrapper but it wasn't quite correct. Before the commit, the followings were broken. * Low level interface functions prefixed with __ ignored arch preference. * reserve_bootmem(...) can't be mapped into reserve_bootmem_node(NODE_DATA(0)->bdata, ...) because the node is not preference here. The region specified MUST fall into the specified region; otherwise, it will panic. After the commit, * If allocation fails for the arch preferred node, it should fallback to whatever is available. Instead, it simply failed allocation. There are too many internal details to allow generic wrapping and still keep things simple for archs. Plus, all that arch wants is a way to prefer certain node over another. This patch drops the generic wrapping around alloc_bootmem_core() and add alloc_bootmem_core() instead. If necessary, arch can define bootmem_arch_referred_node() macro or function which takes all allocation information and returns the preferred node. bootmem generic code will always try the preferred node first and then fallback to other nodes as usual. Breakages noted and changes reviewed by Johannes Weiner. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org>
* bootmem: clean up arch-specific bootmem wrappingTejun Heo2009-02-23
| | | | | | | | | | | | | | | | | | | | | Impact: cleaner and consistent bootmem wrapping By setting CONFIG_HAVE_ARCH_BOOTMEM_NODE, archs can define arch-specific wrappers for bootmem allocation. However, this is done a bit strangely in that only the high level convenience macros can be changed while lower level, but still exported, interface functions can't be wrapped. This not only is messy but also leads to strange situation where alloc_bootmem() does what the arch wants it to do but the equivalent __alloc_bootmem() call doesn't although they should be able to be used interchangeably. This patch updates bootmem such that archs can override / wrap the backend function - alloc_bootmem_core() instead of the highlevel interface functions to allow simpler and consistent wrapping. Also, HAVE_ARCH_BOOTMEM_NODE is renamed to HAVE_ARCH_BOOTMEM. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Johannes Weiner <hannes@saeurebad.de>
* bootmem: print request details before BUG_ON(them)Johannes Weiner2009-01-06
| | | | | | | | | | Moving the request details print-out before the sanity checks that might panic() enables us to analyse invalid requests without having access to the line information of the stack dump. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* misc: replace __FUNCTION__ with __func__Harvey Harrison2008-10-16
| | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: fix aligning of node-relative indexes and offsetsJohannes Weiner2008-08-20
| | | | | | | | | | | | | | | | | | | | | | | | Absolute alignment requirements may never be applied to node-relative offsets. Andreas Herrmann spotted this flaw when a bootmem allocation on an unaligned node was itself not aligned because the combination of an unaligned node with an aligned offset into that node is not garuanteed to be aligned itself. This patch introduces two helper functions that align a node-relative index or offset with respect to the node's starting address so that the absolute PFN or virtual address that results from combining the two satisfies the requested alignment. Then all the broken ALIGN()s in alloc_bootmem_core() are replaced by these helpers. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Reported-by: Andreas Herrmann <andreas.herrmann3@amd.com> Debugged-by: Andreas Herrmann <andreas.herrmann3@amd.com> Reviewed-by: Andreas Herrmann <andreas.herrmann3@amd.com> Tested-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem allocator: alloc_bootmem_core(): page-align the end offsetMikulas Patocka2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the minimal sequence that jams the allocator: void *p, *q, *r; p = alloc_bootmem(PAGE_SIZE); q = alloc_bootmem(64); free_bootmem(p, PAGE_SIZE); p = alloc_bootmem(PAGE_SIZE); r = alloc_bootmem(64); after this sequence (assuming that the allocator was empty or page-aligned before), pointer "q" will be equal to pointer "r". What's hapenning inside the allocator: p = alloc_bootmem(PAGE_SIZE); in allocator: last_end_off == PAGE_SIZE, bitmap contains bits 10000... q = alloc_bootmem(64); in allocator: last_end_off == PAGE_SIZE + 64, bitmap contains 11000... free_bootmem(p, PAGE_SIZE); in allocator: last_end_off == PAGE_SIZE + 64, bitmap contains 01000... p = alloc_bootmem(PAGE_SIZE); in allocator: last_end_off == PAGE_SIZE, bitmap contains 11000... r = alloc_bootmem(64); and now: it finds bit "2", as a place where to allocate (sidx) it hits the condition if (bdata->last_end_off && PFN_DOWN(bdata->last_end_off) + 1 == sidx)) start_off = ALIGN(bdata->last_end_off, align); -you can see that the condition is true, so it assigns start_off = ALIGN(bdata->last_end_off, align); (that is PAGE_SIZE) and allocates over already allocated block. With the patch it tries to continue at the end of previous allocation only if the previous allocation ended in the middle of the page. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Acked-by: Johannes Weiner <hannes@saeurebad.de> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: replace node_boot_start in struct bootmem_dataJohannes Weiner2008-07-24
| | | | | | | | | | | | Almost all users of this field need a PFN instead of a physical address, so replace node_boot_start with node_min_pfn. [Lee.Schermerhorn@hp.com: fix spurious BUG_ON() in mark_bootmem()] Signed-off-by: Johannes Weiner <hannes@saeureba.de> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: revisit alloc_bootmem_sectionJohannes Weiner2008-07-24
| | | | | | | | | | | | | | Since alloc_bootmem_core does no goal-fallback anymore and just returns NULL if the allocation fails, we might now use it in alloc_bootmem_section without all the fixup code for a misplaced allocation. Also, the limit can be the first PFN of the next section as the semantics is that the limit is _above_ the allocated region, not within. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: Make __alloc_bootmem_low_node fall back to other nodesJohannes Weiner2008-07-24
| | | | | | | | | | | __alloc_bootmem_node already does this, make the interface consistent. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: respect goal more likelyJohannes Weiner2008-07-24
| | | | | | | | | | | | | | | | | | | | | | The old node-agnostic code tried allocating on all nodes starting from the one with the lowest range. alloc_bootmem_core retried without the goal if it could not satisfy it and so the goal was only respected at all when it happened to be on the first (lowest page numbers) node (or theoretically if allocations failed on all nodes before to the one holding the goal). Introduce a non-panicking helper that starts allocating from the node holding the goal and falls back only after all thes tries failed, thus moving the goal fallback code out of alloc_bootmem_core. Make all other allocation functions benefit from this new helper. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: factor out the marking of a PFN rangeJohannes Weiner2008-07-24
| | | | | | | | | | | | | | | | | | | | | | | Introduce new helpers that mark a range that resides completely on a node or node-agnostic ranges that might also span node boundaries. The free/reserve API functions will then directly use these helpers. Note that the free/reserve semantics become more strict: while the prior code took basically arbitrary range arguments and marked the PFNs that happen to fall into that range, the new code requires node-specific ranges to be completely on the node. The node-agnostic requests might span node boundaries as long as the nodes are contiguous. Passing ranges that do not satisfy these criteria is a bug. [akpm@linux-foundation.org: fix printk warnings] Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: free/reserve helpersJohannes Weiner2008-07-24
| | | | | | | | | | | | Factor out the common operation of marking a range on the bitmap. [akpm@linux-foundation.org: fix various warnings] Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: clean up alloc_bootmem_coreJohannes Weiner2008-07-24
| | | | | | | | | | | | | | | | | | | | | | alloc_bootmem_core has become quite nasty to read over time. This is a clean rewrite that keeps the semantics. bdata->last_pos has been dropped. bdata->last_success has been renamed to hint_idx and it is now an index relative to the node's range. Since further block searching might start at this index, it is now set to the end of a succeeded allocation rather than its beginning. bdata->last_offset has been renamed to last_end_off to be more clear that it represents the ending address of the last allocation relative to the node. [y-goto@jp.fujitsu.com: fix new alloc_bootmem_core()] Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: clean up free_all_bootmem_coreJohannes Weiner2008-07-24
| | | | | | | | | | | | Rewrite the code in a more concise way using less variables. [akpm@linux-foundation.org: fix printk warnings] Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: revisit bootmem descriptor list handlingJohannes Weiner2008-07-24
| | | | | | | | | | | | | link_bootmem handles an insertion of a new descriptor into the sorted list in more or less three explicit branches; empty list, insert in between and append. These cases can be expressed implicite. Also mark the sorted list as initdata as it can be thrown away after boot as well. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: revisit bitmap size calculationsJohannes Weiner2008-07-24
| | | | | | | | | | | | Reincarnate get_mapsize as bootmap_bytes and implement bootmem_bootmap_pages on top of it. Adjust users of these helpers and make free_all_bootmem_core use bootmem_bootmap_pages instead of open-coding it. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: add debugging frameworkJohannes Weiner2008-07-24
| | | | | | | | | | | Introduce the bootmem_debug kernel parameter that enables very verbose diagnostics regarding all range operations of bootmem as well as the initialization and release of nodes. [akpm@linux-foundation.org: fix printk warnings] Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: add documentation to API functionsJohannes Weiner2008-07-24
| | | | | | Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: clean up bootmem.c file headerJohannes Weiner2008-07-24
| | | | | | | | | | Change the description, move a misplaced comment about the allocator itself and add me to the list of copyright holders. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bootmem: reorder code to match new bootmem structureJohannes Weiner2008-07-24
| | | | | | | | | This only reorders functions so that further patches will be easier to read. No code changed. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: introduce non panic alloc_bootmemAndi Kleen2008-07-24
| | | | | | | | | | | Straight forward variant of the existing __alloc_bootmem_node, only subsequent patch when allocating giant hugepages at boot -- don't want to panic if we can't allocate as many as the user asked for. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: unexport __alloc_bootmem_core()Johannes Weiner2008-07-24
| | | | | | | | | | | | | | | | This function has no external callers, so unexport it. Also fix its naming inconsistency. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: normalize internal argument passing of bootmem dataJohannes Weiner2008-07-24
| | | | | | | | | | | | | | All _core functions only need the bootmem data, not the whole node descriptor. Adjust the two functions that take the node descriptor unneededly. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: fix free_all_bootmem_core alignment checkJohannes Weiner2008-07-24
| | | | | | | | | | | | | | | | | The check for node_boot_start is bogus because we start freeing at the corresponding pfn. So check if the pfn is properly aligned instead in a more readable way and adjust the documentation. Also remove an unneeded accounting variable. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: move bootmem descriptors definition to a single placeJohannes Weiner2008-07-24
| | | | | | | | | | | | | | | | | | | | | | | | There are a lot of places that define either a single bootmem descriptor or an array of them. Use only one central array with MAX_NUMNODES items instead. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: David S. Miller <davem@davemloft.net> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: make defensive checks around PFN values registered for memory usageMel Gorman2008-07-24
| | | | | | | | | | | | | | | | | | | | There are a number of different views to how much memory is currently active. There is the arch-independent zone-sizing view, the bootmem allocator and memory models view. Architectures register this information at different times and is not necessarily in sync particularly with respect to some SPARSEMEM limitations. This patch introduces mminit_validate_memmodel_limits() which is able to validate and correct PFN ranges with respect to the memory model. It is only SPARSEMEM that currently validates itself. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add return value to reserve_bootmem_node()Bernhard Walle2008-06-21
| | | | | | | | | | | | This patch changes the function reserve_bootmem_node() from void to int, returning -ENOMEM if the allocation fails. This fixes a build problem on x86 with CONFIG_KEXEC=y and CONFIG_NEED_MULTIPLE_NODES=y Signed-off-by: Bernhard Walle <bwalle@suse.de> Reported-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* memory hotplug: make alloc_bootmem_section()Yasunori Goto2008-04-28
| | | | | | | | | | | | alloc_bootmem_section() can allocate specified section's area. This is used for usemap to keep same section with pgdat by later patch. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* memory hotplug: register section/node id to freeYasunori Goto2008-04-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch set is to free pages which is allocated by bootmem for memory-hotremove. Some structures of memory management are allocated by bootmem. ex) memmap, etc. To remove memory physically, some of them must be freed according to circumstance. This patch set makes basis to free those pages, and free memmaps. Basic my idea is using remain members of struct page to remember information of users of bootmem (section number or node id). When the section is removing, kernel can confirm it. By this information, some issues can be solved. 1) When the memmap of removing section is allocated on other section by bootmem, it should/can be free. 2) When the memmap of removing section is allocated on the same section, it shouldn't be freed. Because the section has to be logical memory offlined already and all pages must be isolated against page allocater. If it is freed, page allocator may use it which will be removed physically soon. 3) When removing section has other section's memmap, kernel will be able to show easily which section should be removed before it for user. (Not implemented yet) 4) When the above case 2), the page isolation will be able to check and skip memmap's page when logical memory offline (offline_pages()). Current page isolation code fails in this case because this page is just reserved page and it can't distinguish this pages can be removed or not. But, it will be able to do by this patch. (Not implemented yet.) 5) The node information like pgdat has similar issues. But, this will be able to be solved too by this. (Not implemented yet, but, remembering node id in the pages.) Fortunately, current bootmem allocator just keeps PageReserved flags, and doesn't use any other members of page struct. The users of bootmem doesn't use them too. This patch: This is to register information which is node or section's id. Kernel can distinguish which node/section uses the pages allcated by bootmem. This is basis for hot-remove sections or nodes. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: allow reserve_bootmem() cross nodesYinghai Lu2008-04-26
| | | | | | | | | | | | | split reserve_bootmem_core() into two functions, one which checks conflicts, and one which sets the bits. and make reserve_bootmem to loop bdata_list to cross the nodes. user could be crashkernel and ramdisk..., in case the range provided by those externalities crosses the nodes. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* mm: offset align in alloc_bootmem()Yinghai Lu2008-04-26
| | | | | | | | | | | need offset alignment when node_boot_start's alignment is less than the alignment required. use local node_boot_start to match alignment - so don't add extra operation in search loop. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* mm: fix alloc_bootmem_core to use fast searching for all nodesYinghai Lu2008-04-26
| | | | | | | | | | | | | | Make the nodes other than node 0 use bdata->last_success for fast search too. We need to use __alloc_bootmem_core() for vmemmap allocation for other nodes when numa and sparsemem/vmemmap are enabled. Also, make fail_block path increase i with incr only after ALIGN to avoid extra increase when size is larger than align. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* mm: fix boundary checking in free_bootmem_coreYinghai Lu2008-03-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With numa enabled, some callers could have a range of memory on one node but try to free that on other node. This can cause some pages to be freed wrongly. For example: when we try to allocate 128g boot ram early for gart/swiotlb, and free that range later so gart/swiotlb can get some range afterwards. With this patch, we don't need to care which node holds the range, just loop to call free_bootmem_node for all online nodes. This patch makes free_bootmem_core() more robust by trimming the sidx and eidx according the ram range that the node has. And make the free_bootmem_core handle this out of range case. We could use bdata_list to make sure the range can be freed for sure. So next time, we don't need to loop online nodes and could use free_bootmem directly. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Andi Kleen <ak@suse.de> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Ingo Molnar <mingo@elte.hu> Tested-by: Ingo Molnar <mingo@elte.hu> Cc: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Introduce flags for reserve_bootmem()Bernhard Walle2008-02-07
| | | | | | | | | | | | | | | | | | | | | | | | This patchset adds a flags variable to reserve_bootmem() and uses the BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions between crashkernel area and already used memory. This patch: Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE. If that flag is set, the function returns with -EBUSY if the memory already has been reserved in the past. This is to avoid conflicts. Because that code runs before SMP initialisation, there's no race condition inside reserve_bootmem_core(). [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix powerpc build] Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: <linux-arch@vger.kernel.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbolsAdrian Bunk2006-12-07
| | | | | | | | In time for 2.6.20, we can get rid of this junk. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] enable booting a NUMA system where some nodes have no memoryChristian Krafft2006-12-07
| | | | | | | | | | | | | | | When booting a NUMA system with nodes that have no memory (eg by limiting memory), bootmem_alloc_core tried to find pages in an uninitialized bootmem_map. This caused a null pointer access. This fix adds a check, so that NULL is returned. That will enable the caller (bootmem_alloc_nopanic) to alloc memory on other without a panic. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Cc: Christoph Lameter <clameter@engr.sgi.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Martin Bligh <mbligh@google.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] bootmem: use MAX_DMA_ADDRESS instead of LOW32LIMITHeiko Carstens2006-09-26
| | | | | | | | | | | | | Introduce ARCH_LOW_ADDRESS_LIMIT which can be set per architecture to override the 4GB default limit used by the bootmem allocater within __alloc_bootmem_low() and __alloc_bootmem_low_node(). E.g. s390 needs a 2GB limit instead of 4GB. Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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