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* [PATCH] arm26: remove irq_exit() from hardirq.hAlexey Dobriyan2006-02-01
| | | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Ian Molton <spyro@f2s.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] arm26: fix warnings about NR_IRQS being not definedAlexey Dobriyan2006-02-01
| | | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Ian Molton <spyro@f2s.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] arm26: fix find_first_zero_bit related warningsAlexey Dobriyan2006-02-01
| | | | | | | | | | | | include/linux/nodemask.h: In function `__first_unset_node': include/linux/nodemask.h:254: warning: passing arg 1 of `_find_first_zero_bit_le' discards qualifiers from pointer target type fs/minix/bitmap.c: In function `minix_new_block': fs/minix/bitmap.c:89: warning: passing arg 1 of `_find_first_zero_bit_le' from incompatible pointer type Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Ian Molton <spyro@f2s.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] alpha show_interrups() trashes argumentEric Sesterhenn2006-02-01
| | | | | | | | | | | | | | This is a bug found by cpminer. The show_interrupts function reuses i as a for loop counter, and therefore trashes its contents, which are needed later. (akpm: rename local `i' to `irq', use for_each_inline_cpu()) Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] alpha: Fix getxpid on alpha so it works for threadsEric W. Biederman2006-02-01
| | | | | | | | | | | While looking in the code I discovered that alpha has fallen behind because it doesn't use sys_getppid. The problem is that it doesn't follow the task struct to the task_group_leader. Acked-by: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] VMSPLIT config optionsMark Lord2006-02-01
| | | | | | | | | | | | | | | | | | | | | | | | Enable selection of different user/kernel VM splits for i386, including an optimized mode for 1GB physical RAM, which gives the kernel a direct (non HIGHMEM) mapping to the entire 1GB rather than just the first 896MB. There is a similarly a similarly optimized mode for machines with exactly 2GB of physical RAM. This can speed up the kernel by avoiding having to create/destroy temporary HIGHMEM mappings, and by not having to include HIGHMEM support at all on such machines. The flip side is that there's less virtual addressing left for userspace in these alternatives, and some binary-only kernel modules may misbehave unless rebuilt with the same VMSPLIT option as the main kernel image. Original idea/patch from Jens Axboe, modified based on suggestions from Linus et al. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] arch/sh64/kernel/time.c: add module.hAlexey Dobriyan2006-02-01
| | | | | | | | | | | | | It uses EXPORT_SYMBOL. arch/sh64/kernel/time.c:254: warning: type defaults to `int' in declaration of `EXPORT_SYMBOL' arch/sh64/kernel/time.c:254: warning: parameter names (without types) in function declaration arch/sh64/kernel/time.c:254: warning: data definition has no type or storage class Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh/sh64: Fix bogus TIOCGICOUNT definitionsPaul Mundt2006-02-01
| | | | | | | | | | As reported by Russell King, sh and sh64 currently have bogus definitions for TIOCGICOUNT, particularly referencing a kernel only structure. Switch to using a sensible ioctl value. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: machine_halt()/machine_power_off() cleanupsPaul Mundt2006-02-01
| | | | | | | | | | | | machine_halt() managed to trigger the soft lockup detection due to not disabling interrupts before going to sleep, so correct that. machine_power_off() should be using pm_power_off, which lets us drop the board-specific hacks from here. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: Add missing timers directory rule to buildPaul Mundt2006-02-01
| | | | | | | | | This should have been part of the timer framework support that was merged earlier, but looks to have been accidentally omitted. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: sh-sci clock framework updatesPaul Mundt2006-02-01
| | | | | | | | | | | | A couple of updates for the sh-sci serial driver: - Update for clock framework on sh. - Fix a compile error introduced by some h8300 changes. - Add SH7770/SH7780 subtype support. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: convert voyagergx to platform device, drop sh-busPaul Mundt2006-02-01
| | | | | | | | | | | | Trivial patch updating the voyagergx cchip code to reference a platform device instead, now that the dma mask is taken care of. Given this, there's no longer any reason to drag around the SH-bus code, so kill that off entirely. Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Paul Mundt <lethal@linux-sh.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: drop maskpos from make_ipr_irq(), remove duplicate irq definitionsPaul Mundt2006-02-01
| | | | | | | | | | | Clean up some of the subtype IRQ definitions for IPR IRQ, and consolidate the make_ipr_irq() definitions by dropping maskpos. SH-4A was the only thing interested in the maskpos, and this should be handled through INTC2 rather than IPR. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: unknown mach-type updatesPaul Mundt2006-02-01
| | | | | | | | | Trivial cleanup of the unknown machine type for some of the recent machvec changes. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: Cleanup struct sh_cpuinfo for clock framework changesPaul Mundt2006-02-01
| | | | | | | | | | | | Now that the clock framework changes have been integrated, the manual clock accounting that was done in sh_cpuinfo can be dropped. Also correct a bug with running past the end of the CPU flags when there's a mismatch between the added flags and printed ones. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: Move TRA/EXPEVT/INTEVT definitions for reusePaul Mundt2006-02-01
| | | | | | | | | Currently entry.S is home to these definitions, so we move them somewhere more sensible. IPR IRQ handling depends on being to read from INTEVT. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: Make peripheral clock frequency setting mandatoryPaul Mundt2006-02-01
| | | | | | | | | | Pretty much every subtype does this now anyways, and as we depend on it in a few places being set to something sensible quite early on, it's better for a new subtype to simply set a sensible default. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh: SH4-202 microdev updatesPaul Mundt2006-02-01
| | | | | | | | | | | | | A few trivial updates for the microdev board support code: - Update for __IO_PREFIX changes. - Consolidate headers into a single microdev.h. - Update the microdev_defconfig. - Add init values for the S1D13806 used by s1d13xxxfb. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] powerpc: Fix sigmask handling in sys_sigsuspend.Heiko Carstens2006-02-01
| | | | | | | | | | Better save the sigmask instead of throwing it away so it can be restored. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] MODALIAS= for macioOlaf Hering2006-02-01
| | | | | | | | | | | | | Prodive a MODALIAS= enviroment variable for devices on the mac-io bus. Change the buffer length counter to not waste memory by advancing the pointer for the next string too far. Tested on an ibook1 with modular pmac_zilog. Signed-off-by: Olaf Hering <olh@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] powerpc: fix for kexec ppc32Albert Herranz2006-02-01
| | | | | | | | | | | | | | | - kexec.h is included from assembly code, thus C code must be properly protected. - (embedded) ppc32 systems use machine_kexec_simple whose declaration vanished during a recent powerpc merge change. Signed-off-by: Albert Herranz <albert_herranz@yahoo.es> Cc: <fastboot@osdl.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] selinux: remove security struct magic number fields and testsStephen Smalley2006-02-01
| | | | | | | | | | | | Remove the SELinux security structure magic number fields and tests, along with some unnecessary tests for NULL security pointers. These fields and tests are leftovers from the early attempts to support SELinux as a loadable module during LSM development. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] selinux: change file_alloc_security to use GFP_KERNELStephen Smalley2006-02-01
| | | | | | | | | | | | This patch changes the SELinux file_alloc_security function to use GFP_KERNEL rather than GFP_ATOMIC; the use of GFP_ATOMIC appears to be a remnant of when this function was being called with the files_lock spinlock held, and is no longer necessary. Please apply. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] selinux: fix and cleanup mprotect checksStephen Smalley2006-02-01
| | | | | | | | | | | | | Fix the SELinux mprotect checks on executable mappings so that they are not re-applied when the mapping is already executable as well as cleaning up the code. This avoids a situation where e.g. an application is prevented from removing PROT_WRITE on an already executable mapping previously authorized via execmem permission due to an execmod denial. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: fix sparse warningRandy Dunlap2006-02-01
| | | | | | | | mm/slab.c:1522:13: error: incompatible types for operation (&) Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm/slab: add kernel-doc for one functionRandy.Dunlap2006-02-01
| | | | | | | | Fix kernel-doc for calculate_slab_order(). Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: fix kzalloc and kstrdup caller report for CONFIG_DEBUG_SLABPekka Enberg2006-02-01
| | | | | | | | | | | | | | Fix kzalloc() and kstrdup() caller report for CONFIG_DEBUG_SLAB. We must pass the caller to __cache_alloc() instead of directly doing __builtin_return_address(0) there; otherwise kzalloc() and kstrdup() are reported as the allocation site instead of the real one. Thanks to Valdis Kletnieks for reporting the problem and Steven Rostedt for the original idea. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] dump_stack() in oom handlerAndrew Morton2006-02-01
| | | | | | | Sometimes it's nice to know who's calling. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: replace kmem_cache_t with struct kmem_cachePekka Enberg2006-02-01
| | | | | | | | Replace uses of kmem_cache_t with proper struct kmem_cache in mm/slab.c. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: rename ac_data to cpu_cache_getPekka Enberg2006-02-01
| | | | | | | | | Rename the ac_data() function to more descriptive cpu_cache_get(). Acked-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: extract virt_to_{cache|slab}Pekka Enberg2006-02-01
| | | | | | | | | | | Introduce virt_to_cache() and virt_to_slab() functions to reduce duplicate code and introduce a proper abstraction should we want to support other kind of mapping for address to slab and cache (eg. for vmalloc() or I/O memory). Acked-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: reduce inliningPekka Enberg2006-02-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | From: Manfred Spraul <manfred@colorfullife.com> Reduce the amount of inline functions in slab to the functions that are used in the hot path: - no inline for debug functions - no __always_inline, inline is already __always_inline - remove inline from a few numa support functions. Before: text data bss dec hex filename 13588 752 48 14388 3834 mm/slab.o (defconfig) 16671 2492 48 19211 4b0b mm/slab.o (numa) After: text data bss dec hex filename 13366 752 48 14166 3756 mm/slab.o (defconfig) 16230 2492 48 18770 4952 mm/slab.o (numa) Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: extract slab_{put|get}_objMatthew Dobson2006-02-01
| | | | | | | | | | | Create two helper functions slab_get_obj() and slab_put_obj() to replace duplicated code in mm/slab.c Signed-off-by: Matthew Dobson <colpatch@us.ibm.com> Acked-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: extract slab_destroy_objs()Matthew Dobson2006-02-01
| | | | | | | | | | | | Create a helper function, slab_destroy_objs() which called from slab_destroy(). This makes slab_destroy() smaller and more readable, and moves ifdefs outside the function body. Signed-off-by: Matthew Dobson <colpatch@us.ibm.com> Acked-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: cache_estimate cleanupSteven Rostedt2006-02-01
| | | | | | | | | | | | | | | | | | | | Clean up cache_estimate() in mm/slab.c and improves the algorithm from O(n) to O(1). We first calculate the maximum number of objects a slab can hold after struct slab and kmem_bufctl_t for each object has been given enough space. After that, to respect alignment rules, we decrease the number of objects if necessary. As required padding is at most align-1 and memory of obj_size is at least align, it is always enough to decrease number of objects by one. The optimization was originally made by Balbir Singh with more improvements from Steven Rostedt. Manfred Spraul provider further modifications: no loop at all for the off-slab case and added comments to explain the background. Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: have index_of bug at compile timeSteven Rostedt2006-02-01
| | | | | | | | | | | | | | I noticed the code for index_of is a creative way of finding the cache index using the compiler to optimize to a single hard coded number. But I couldn't help noticing that it uses two methods to let you know that someone used it wrong. One is at compile time (the correct way), and the other is at run time (not good). Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: minor cleanup to kmem_cache_alloc_nodeChristoph Lameter2006-02-01
| | | | | | | | | | Clean up kmem_cache_alloc_node a bit. Signed-off-by: Christoph Lameter <clameter@sgi.com> Acked-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: distinguish between object and buffer sizeManfred Spraul2006-02-01
| | | | | | | | | | | | | | An object cache has two different object lengths: - the amount of memory available for the user (object size) - the amount of memory allocated internally (buffer size) This patch does some renames to make the code reflect that better. Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Direct Migration V9: Avoid writeback / page_migrate() methodChristoph Lameter2006-02-01
| | | | | | | | | | | | | | | | | | | Migrate a page with buffers without requiring writeback This introduces a new address space operation migratepage() that may be used by a filesystem to implement its own version of page migration. A version is provided that migrates buffers attached to pages. Some filesystems (ext2, ext3, xfs) are modified to utilize this feature. The swapper address space operation are modified so that a regular migrate_page() will occur for anonymous pages without writeback (migrate_pages forces every anonymous page to have a swap entry). Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Direct Migration V9: upgrade MPOL_MF_MOVE and sys_migrate_pages()Christoph Lameter2006-02-01
| | | | | | | | | | | | | | | | Modify policy layer to support direct page migration - Add migrate_pages_to() allowing the migration of a list of pages to a a specified node or to vma with a specific allocation policy in sets of MIGRATE_CHUNK_SIZE pages - Modify do_migrate_pages() to do a staged move of pages from the source nodes to the target nodes. Signed-off-by: Paul Jackson <pj@sgi.com> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Direct Migration V9: remove_from_swap() to remove swap ptesChristoph Lameter2006-02-01
| | | | | | | | | | | | | Add remove_from_swap remove_from_swap() allows the restoration of the pte entries that existed before page migration occurred for anonymous pages by walking the reverse maps. This reduces swap use and establishes regular pte's without the need for page faults. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Direct Migration V9: migrate_pages() extensionChristoph Lameter2006-02-01
| | | | | | | | | | | | | | | | | | | | | | | | | Add direct migration support with fall back to swap. Direct migration support on top of the swap based page migration facility. This allows the direct migration of anonymous pages and the migration of file backed pages by dropping the associated buffers (requires writeout). Fall back to swap out if necessary. The patch is based on lots of patches from the hotplug project but the code was restructured, documented and simplified as much as possible. Note that an additional patch that defines the migrate_page() method for filesystems is necessary in order to avoid writeback for anonymous and file backed pages. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Direct Migration V9: PageSwapCache checksChristoph Lameter2006-02-01
| | | | | | | | | | | | | | | | | | | | Check for PageSwapCache after looking up and locking a swap page. The page migration code may change a swap pte to point to a different page under lock_page(). If that happens then the vm must retry the lookup operation in the swap space to find the correct page number. There are a couple of locations in the VM where a lock_page() is done on a swap page. In these locations we need to check afterwards if the page was migrated. If the page was migrated then the old page that was looked up before was freed and no longer has the PageSwapCache bit set. Signed-off-by: Hirokazu Takahashi <taka@valinux.co.jp> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Christoph Lameter <clameter@@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Reclaim slab during zone reclaimChristoph Lameter2006-02-01
| | | | | | | | | | | | | | | | | | | If large amounts of zone memory are used by empty slabs then zone_reclaim becomes uneffective. This patch shakes the slab a bit. The problem with this patch is that the slab reclaim is not containable to a zone. Thus slab reclaim may affect the whole system and be extremely slow. This also means that we cannot determine how many pages were freed in this zone. Thus we need to go off node for at least one allocation. The functionality is disabled by default. We could modify the shrinkers to take a zone parameter but that would be quite invasive. Better ideas are welcome. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Zone reclaim: Allow modification of zone reclaim behaviorChristoph Lameter2006-02-01
| | | | | | | | | | | | | | | | | | In some situations one may want zone_reclaim to behave differently. For example a process writing large amounts of memory will spew unto other nodes to cache the writes if many pages in a zone become dirty. This may impact the performance of processes running on other nodes. Allowing writes during reclaim puts a stop to that behavior and throttles the process by restricting the pages to the local zone. Similarly one may want to contain processes to local memory by enabling regular swap behavior during zone_reclaim. Off node memory allocation can then be controlled through memory policies and cpusets. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] zone_reclaim: configurable off node allocation period.Christoph Lameter2006-02-01
| | | | | | | | | | | | | | | | | | | Currently the zone_reclaim code has a fixed window of 30 seconds of off node allocations should a local zone have no unused pagecache pages left. Reclaim will be attempted again after this timeout period to avoid repeated useless scans for memory. This is also useful to established sufficiently large off node allocation chunks to relieve the local node. It may be beneficial to adjust that time period for some special situations. For example if memory use was exceeding node capacity one may want to give up for longer periods of time. If memory spikes intermittendly then one may want to shorten the time period to reduce the number of off node allocations. This patch allows just that.... Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] zone_reclaim: partial scans instead of full scanChristoph Lameter2006-02-01
| | | | | | | | | | | | | Instead of scanning all the pages in a zone, imitate real swap and scan only a portion of the pages and gradually scan more if we do not free up enough pages. This avoids a zone suddenly loosing all unused pagecache pages (we may after all access some of these again so they deserve another chance) but it still frees up large chunks of memory if a zone only contains unused pagecache pages. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] zone_reclaim: do not unmap file backed pagesChristoph Lameter2006-02-01
| | | | | | | | | zone_reclaim should leave that to the real swapper. We are only interested in evicting unmapped pages. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm: hugepage accounting fixHugh Dickins2006-02-01
| | | | | | | | | | | | | | | | 2.6.15's hugepage faulting introduced huge_pages_needed accounting into hugetlbfs: to count how many pages are already in cache, for spot check on how far a new mapping may be allowed to extend the file. But it's muddled: each hugepage found covers HPAGE_SIZE, not PAGE_SIZE. Once pages were already in cache, it would overshoot, wrap its hugepages count backwards, and so fail a harmless repeat mapping with -ENOMEM. Fixes the problem found by Don Dupuis. Signed-off-by: Hugh Dickins <hugh@veritas.com> Acked-By: Adam Litke <agl@us.ibm.com> Acked-by: William Irwin <wli@holomorphy.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Use 32 bit division in slab_put_obj()Benjamin LaHaise2006-02-01
| | | | | | | | | | | | | | Improve the performance of slab_put_obj(). Without the cast, gcc considers ptrdiff_t a 64 bit signed integer and ends up emitting code to use a full signed 128 bit divide on EM64T, which is substantially slower than a 32 bit unsigned divide. I noticed this when looking at the profile of a case where the slab balance is just on edge and thrashes back and forth freeing a block. Signed-off-by: Benjamin LaHaise <benjamin.c.lahaise@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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