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* [IA64] Avoid kernel hang during CMC interrupt stormBryan Sutula2005-10-06
| | | | | | | | | | | | | | | | | | | | I've noticed a kernel hang during a storm of CMC interrupts, which was tracked down to the continual execution of the interrupt handler. There's code in the CMC handler that's supposed to disable CMC interrupts and switch to polling mode when it sees a bunch of CMCs. Because disabling CMCs across all CPUs isn't safe in interrupt context, the disable is done with a schedule_work(). But with continual CMC interrupts, the schedule_work() never gets executed. The following patch immediately disables CMC interrupts for the current CPU. This then allows (at least) one CPU to ignore CMC interrupts, execute the schedule_work() code, and disable CMC interrupts on the rest of the CPUs. Acked-by: Keith Owens <kaos@sgi.com> Signed-off-by: Bryan Sutula <Bryan.Sutula@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] MCA recovery verify pfn_validHidetoshi Seto2005-09-22
| | | | | | | | | Verify the pfn is valid before calling pfn_to_page(), and cut isolation message if nothing was done. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Acked-by: Russ Anderson <rja@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Wire in the MCA/INIT handler stacksKeith Owens2005-09-22
| | | | | | | | | | Wire the MCA/INIT handler stacks into DTR[2] and track them in IA64_KR(CURRENT_STACK). This gives the MCA/INIT handler stacks the same TLB status as normal kernel stacks. Reload the old CURRENT_STACK data on return from OS to SAL. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Fix simscsi for new SCSI midlayerPeter Chubb2005-09-22
| | | | | | | | | | | | | | | The sd driver now uses scsi_execute_req() for almost everything. scsi_execute_req() converts requests into scatterlists. Fix the HP SCSI disk simulator to understand scatterlists for more commands. Without this patch the current kernel will not boot on the simulator (the disks are always detected as having no sectors, and so cannot be mounted). Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [PATCH] files: fix preemption issuesDipankar Sarma2005-09-17
| | | | | | | | | | With the new fdtable locking rules, you have to protect fdtable with either ->file_lock or rcu_read_lock/unlock(). There are some places where we aren't doing either. This patch fixes those places. Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [IA64] mca_drv cleanupHidetoshi Seto2005-09-16
| | | | | | | | There were some trailing white spaces, long lines, brackets in weird style etc. This patch cleans them up. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Remove warnings for gcc 4.0 IA64 compilation.Peter Chubb2005-09-16
| | | | | | | | This patch removes some compilation warnings, mostly trivially. acpi.c fix also noted by Kenji Kaneshige. Signed-off-by; Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [LIB]: Consolidate _atomic_dec_and_lock()David S. Miller2005-09-15
| | | | | | | | | | | | Several implementations were essentialy a common piece of C code using the cmpxchg() macro. Put the implementation in one spot that everyone can share, and convert sparc64 over to using this. Alpha is the lone arch-specific implementation, which codes up a special fast path for the common case in order to avoid GP reloading which a pure C version would require. Signed-off-by: David S. Miller <davem@davemloft.net>
* Pull fix-offsets-h into release branchTony Luck2005-09-14
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| * [IA64] fix circular dependency on generation of asm-offsets.hTony Luck2005-09-13
| | | | | | | | | | | | Fix? One ugly hack is replaced by a different ugly hack. Signed-off-by: Tony Luck <tony.luck@intel.com>
* | [PATCH] error path in setup_arg_pages() misses vm_unacct_memory()Hugh Dickins2005-09-14
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | Pavel Emelianov and Kirill Korotaev observe that fs and arch users of security_vm_enough_memory tend to forget to vm_unacct_memory when a failure occurs further down (typically in setup_arg_pages variants). These are all users of insert_vm_struct, and that reservation will only be unaccounted on exit if the vma is marked VM_ACCOUNT: which in some cases it is (hidden inside VM_STACK_FLAGS) and in some cases it isn't. So x86_64 32-bit and ppc64 vDSO ELFs have been leaking memory into Committed_AS each time they're run. But don't add VM_ACCOUNT to them, it's inappropriate to reserve against the very unlikely case that gdb be used to COW a vDSO page - we ought to do something about that in do_wp_page, but there are yet other inconsistencies to be resolved. The safe and economical way to fix this is to let insert_vm_struct do the security_vm_enough_memory check when it finds VM_ACCOUNT is set. And the MIPS irix_brk has been calling security_vm_enough_memory before calling do_brk which repeats it, doubly accounting and so also leaking. Remove that, and all the fs and arch calls to security_vm_enough_memory: give it a less misleading name later on. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-Off-By: Kirill Korotaev <dev@sw.ru> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86-64: Fix 32bit sendfileTsuneo.Yoshioka@f-secure.com2005-09-12
| | | | | | | | | | | | | | | If we use 64bit kernel on ia64/x86_64/s390 architecture, and we run 32bit binary on 32bit compatibility mode, sendfile system call seems be not set offset argument. This is because sendfile's return value is not zero but the code regards the result by return value is zero or not. This problem will be affect to ia64/x86_64/s390 and not affect to other architecture does not affect other architecture (mips/parisc/ppc64/sparc64). Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'release' of ↵Linus Torvalds2005-09-11
|\ | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6
| * Pull sn-features into release branchTony Luck2005-09-11
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| | * [IA64-SGI] Add new vendor-specific SAL calls for:Jack Steiner2005-08-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - notifying the PROM of specific features that are supported by the OS. This is used to enable PROM feature if and only if the corresponding feature is implemented in the OS - fetch feature sets that are supported by the current PROM. This allows the OS to selectively enable features when the PROM support is available. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | Pull sim-fixes into release branchTony Luck2005-09-11
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| | * | [IA64] Fix nasty VMLPT problem...Peter Chubb2005-08-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've solved the problem I was having with the simulator and not booting Debian. The problem is that the number of bits for the virtual linear array short-format VHPT (Virtually mapped linear page table, VMLPT for short) is being tested incorrectly. There are two problems: 1. The PAL call that should tell the kernel the size of the virtual address space isn't implemented for the simulator, so the kernel uses the default 50. This is addressed separately in dc90e95f310f4f821c905b2aec8e9449bb3270fa 2. In arch/ia64/mm/init.c there's code to calcualte the size of the VMLPT based on the number of implemented virtual address bits and the page size. It checks to see if the VMLPT base address overlaps the top of the mapped region, but this check doesn't allow for the address space hole, and in fact will never trigger. Here's an alternative test and panic, that I think is more accurate. Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * | [IA64] Allow /proc/pal/cpu0/vm_info under the simulatorPeter Chubb2005-08-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Not all of the PAL VM calls are implemented for the SKI simulator. Don't just give up if one fails, print information from the calls that succeed. Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * | [IA64] Add PAL_VM_SUMMARY/PAL_MEM_ATTRIB to bootloader for SKIPeter Chubb2005-08-31
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements PAL_VM_SUMMARY (and PAL_MEM_ATTRIB for good measure) and pretends that the simulated machine is a McKinley. Some extra comments and clean-up by Tony Luck. Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] MCA/INIT: remove obsolete unwind codeKeith Owens2005-09-11
| | | | | | | | | | | | | | | | | | | | | | | | Delete the special case unwind code that was only used by the old MCA/INIT handler. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] MCA/INIT: remove the physical mode path from minstate.hKeith Owens2005-09-11
| | | | | | | | | | | | | | | | | | | | | Remove the physical mode path from minstate.h. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [PATCH] MCA/INIT: use per cpu stacksKeith Owens2005-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bulk of the change. Use per cpu MCA/INIT stacks. Change the SAL to OS state (sos) to be per process. Do all the assembler work on the MCA/INIT stacks, leaving the original stack alone. Pass per cpu state data to the C handlers for MCA and INIT, which also means changing the mca_drv interfaces slightly. Lots of verification on whether the original stack is usable before converting it to a sleeping process. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] MCA/INIT: avoid reading INIT record during INIT eventKeith Owens2005-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reading the INIT record from SAL during the INIT event has proved to be unreliable, and a source of hangs during INIT processing. The new MCA/INIT handlers remove the need to get the INIT record from SAL. Change salinfo.c so mca.c can just flag that a new record is available, without having to read the record during INIT processing. This patch can be applied without the new MCA/INIT handlers. Also clean up some usage of NR_CPUS which should have been using cpu_online(). Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | kbuild: rename prepare to archprepare to fix dependency chainSam Ravnborg2005-09-11
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When introducing the generic asm-offsets.h support the dependency chain for the prepare targets was changed. All build scripts expecting include/asm/asm-offsets.h to be made when using the prepare target would broke. With the limited number of prepare targets left in arch Makefiles the trivial solution was to introduce a new arch specific target: archprepare The dependency chain looks like this now: prepare | +--> prepare0 | +--> archprepare | +--> scripts_basic +--> prepare1 | +---> prepare2 | +--> prepare3 So prepare 3 is processed before prepare2 etc. This guaantees that the asm symlink, version.h, scripts_basic are all updated before archprepare is processed. prepare0 which build the asm-offsets.h file will need the actions performed by archprepare. The head target is now named prepare, because users scripts will most likely use that target, but prepare-all has been kept for compatibility. Updated Documentation/kbuild/makefiles.txt. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* | [PATCH] spinlock consolidationIngo Molnar2005-09-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch (written by me and also containing many suggestions of Arjan van de Ven) does a major cleanup of the spinlock code. It does the following things: - consolidates and enhances the spinlock/rwlock debugging code - simplifies the asm/spinlock.h files - encapsulates the raw spinlock type and moves generic spinlock features (such as ->break_lock) into the generic code. - cleans up the spinlock code hierarchy to get rid of the spaghetti. Most notably there's now only a single variant of the debugging code, located in lib/spinlock_debug.c. (previously we had one SMP debugging variant per architecture, plus a separate generic one for UP builds) Also, i've enhanced the rwlock debugging facility, it will now track write-owners. There is new spinlock-owner/CPU-tracking on SMP builds too. All locks have lockup detection now, which will work for both soft and hard spin/rwlock lockups. The arch-level include files now only contain the minimally necessary subset of the spinlock code - all the rest that can be generalized now lives in the generic headers: include/asm-i386/spinlock_types.h | 16 include/asm-x86_64/spinlock_types.h | 16 I have also split up the various spinlock variants into separate files, making it easier to see which does what. The new layout is: SMP | UP ----------------------------|----------------------------------- asm/spinlock_types_smp.h | linux/spinlock_types_up.h linux/spinlock_types.h | linux/spinlock_types.h asm/spinlock_smp.h | linux/spinlock_up.h linux/spinlock_api_smp.h | linux/spinlock_api_up.h linux/spinlock.h | linux/spinlock.h /* * here's the role of the various spinlock/rwlock related include files: * * on SMP builds: * * asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the * initializers * * linux/spinlock_types.h: * defines the generic type and initializers * * asm/spinlock.h: contains the __raw_spin_*()/etc. lowlevel * implementations, mostly inline assembly code * * (also included on UP-debug builds:) * * linux/spinlock_api_smp.h: * contains the prototypes for the _spin_*() APIs. * * linux/spinlock.h: builds the final spin_*() APIs. * * on UP builds: * * linux/spinlock_type_up.h: * contains the generic, simplified UP spinlock type. * (which is an empty structure on non-debug builds) * * linux/spinlock_types.h: * defines the generic type and initializers * * linux/spinlock_up.h: * contains the __raw_spin_*()/etc. version of UP * builds. (which are NOPs on non-debug, non-preempt * builds) * * (included on UP-non-debug builds:) * * linux/spinlock_api_up.h: * builds the _spin_*() APIs. * * linux/spinlock.h: builds the final spin_*() APIs. */ All SMP and UP architectures are converted by this patch. arm, i386, ia64, ppc, ppc64, s390/s390x, x64 was build-tested via crosscompilers. m32r, mips, sh, sparc, have not been tested yet, but should be mostly fine. From: Grant Grundler <grundler@parisc-linux.org> Booted and lightly tested on a500-44 (64-bit, SMP kernel, dual CPU). Builds 32-bit SMP kernel (not booted or tested). I did not try to build non-SMP kernels. That should be trivial to fix up later if necessary. I converted bit ops atomic_hash lock to raw_spinlock_t. Doing so avoids some ugly nesting of linux/*.h and asm/*.h files. Those particular locks are well tested and contained entirely inside arch specific code. I do NOT expect any new issues to arise with them. If someone does ever need to use debug/metrics with them, then they will need to unravel this hairball between spinlocks, atomic ops, and bit ops that exist only because parisc has exactly one atomic instruction: LDCW (load and clear word). From: "Luck, Tony" <tony.luck@intel.com> ia64 fix Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjanv@infradead.org> Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Cc: Matthew Wilcox <willy@debian.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Mikael Pettersson <mikpe@csd.uu.se> Signed-off-by: Benoit Boissinot <benoit.boissinot@ens-lyon.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | Merge master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild Linus Torvalds2005-09-09
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| * | kbuild: ia64 use generic asm-offsets.h supportSam Ravnborg2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | Delete obsolete stuff from arch Makefile Rename file to asm-offsets.h The trick used in the arch Makefile to circumvent the circular dependency is kept. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* | | [PATCH] more SPIN_LOCK_UNLOCKED -> DEFINE_SPINLOCK conversionsIngo Molnar2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | This converts the final 20 DEFINE_SPINLOCK holdouts. (another 580 places are already using DEFINE_SPINLOCK). Build tested on x86. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] files: break up files structDipankar Sarma2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order for the RCU to work, the file table array, sets and their sizes must be updated atomically. Instead of ensuring this through too many memory barriers, we put the arrays and their sizes in a separate structure. This patch takes the first step of putting the file table elements in a separate structure fdtable that is embedded withing files_struct. It also changes all the users to refer to the file table using files_fdtable() macro. Subsequent applciation of RCU becomes easier after this. Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] Prefetch kernel stacks to speed up context switchChen, Kenneth W2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For architecture like ia64, the switch stack structure is fairly large (currently 528 bytes). For context switch intensive application, we found that significant amount of cache misses occurs in switch_to() function. The following patch adds a hook in the schedule() function to prefetch switch stack structure as soon as 'next' task is determined. This allows maximum overlap in prefetch cache lines for that structure. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [IA64] Manual merge fix for 3 filesTony Luck2005-09-08
|\| | | | | | | | | | | | | | | | | | | | | | | arch/ia64/Kconfig arch/ia64/kernel/acpi.c include/asm-ia64/irq.h Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | Merge linux-2.6 with linux-acpi-2.6Len Brown2005-09-08
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| | * | [PATCH] bogus #if (simserial)viro@ZenIV.linux.org.uk2005-09-07
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| | * | [PATCH] kprobes: fix bug when probed on task and isr functionsKeshavamurthy Anil S2005-09-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a race condition where in system used to hang or sometime crash within minutes when kprobes are inserted on ISR routine and a task routine. The fix has been stress tested on i386, ia64, pp64 and on x86_64. To reproduce the problem insert kprobes on schedule() and do_IRQ() functions and you should see hang or system crash. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| | * | [PATCH] Kprobes/IA64: fix race when break hits and kprobe not foundKeshavamurthy Anil S2005-09-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch addresses a potential race condition for a case where Kprobe has been removed right after another CPU has taken a break hit. The way this is addressed here is when the CPU that has taken a break hit does not find its corresponding kprobe, then we check to see if the original instruction got replaced with other than break. If it got replaced with other than break instruction, then we continue to execute from the replaced instruction, else if we find that it is still a break, then we let the kernel handle this, as this might be the break instruction inserted by other than kprobe(may be kernel debugger). Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| | * | [PATCH] Kprobes: prevent possible race conditions ia64 changesPrasanna S Panchamukhi2005-09-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch contains the ia64 architecture specific changes to prevent the possible race conditions. Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| | * | [PATCH] IA64: convert kcalloc to kzallocPekka Enberg2005-09-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch converts kcalloc(1, ...) calls to use the new kzalloc() function. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| | * | [PATCH] remove duplicated sys_open32() code from 64bit archsMiklos Szeredi2005-09-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 64 bit architectures all implement their own compatibility sys_open(), when in fact the difference is simply not forcing the O_LARGEFILE flag. So use the a common function instead. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Cc: <viro@parcelfarce.linux.theplanet.co.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| | * | [PATCH] cpusets: Move the ia64 domain setup code to the generic codeJohn Hawkes2005-09-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| | * | [PATCH] ia64 cpuset + build_sched_domains() mangles structuresJohn Hawkes2005-09-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've already sent this to the maintainers, and this is now being sent to a larger community audience. I have fixed a problem with the ia64 version of build_sched_domains(), but a similar fix still needs to be made to the generic build_sched_domains() in kernel/sched.c. The "dynamic sched domains" functionality has recently been merged into 2.6.13-rcN that sees the dynamic declaration of a cpu-exclusive (a.k.a. "isolated") cpuset and rebuilds the CPU Scheduler sched domains and sched groups to separate away the CPUs in this cpu-exclusive cpuset from the remainder of the non-isolated CPUs. This allows the non-isolated CPUs to completely ignore the isolated CPUs when doing load-balancing. Unfortunately, build_sched_domains() expects that a sched domain will include all the CPUs of each node in the domain, i.e., that no node will belong in both an isolated cpuset and a non-isolated cpuset. Declaring a cpuset that violates this presumption will produce flawed data structures and will oops the kernel. To trigger the problem (on a NUMA system with >1 CPUs per node): cd /dev/cpuset mkdir newcpuset cd newcpuset echo 0 >cpus echo 0 >mems echo 1 >cpu_exclusive I have fixed this shortcoming for ia64 NUMA (with multiple CPUs per node). A similar shortcoming exists in the generic build_sched_domains() (in kernel/sched.c) for NUMA, and that needs to be fixed also. The fix involves dynamically allocating sched_group_nodes[] and sched_group_allnodes[] for each invocation of build_sched_domains(), rather than using global arrays for these structures. Care must be taken to remember kmalloc() addresses so that arch_destroy_sched_domains() can properly kfree() the new dynamic structures. Signed-off-by: John Hawkes <hawkes@sgi.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Ingo Molnar <mingo@elte.hu> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| | * | [PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinityAshok Raj2005-09-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When handling writes to /proc/irq, current code is re-programming rte entries directly. This is not recommended and could potentially cause chipset's to lockup, or cause missing interrupts. CONFIG_IRQ_BALANCE does this correctly, where it re-programs only when the interrupt is pending. The same needs to be done for /proc/irq handling as well. Otherwise user space irq balancers are really not doing the right thing. - Changed pending_irq_balance_cpumask to pending_irq_migrate_cpumask for lack of a generic name. - added move_irq out of IRQ_BALANCE, and added this same to X86_64 - Added new proc handler for write, so we can do deferred write at irq handling time. - Display of /proc/irq/XX/smp_affinity used to display CPU_MASKALL, instead it now shows only active cpu masks, or exactly what was set. - Provided a common move_irq implementation, instead of duplicating when using generic irq framework. Tested on i386/x86_64 and ia64 with CONFIG_PCI_MSI turned on and off. Tested UP builds as well. MSI testing: tbd: I have cards, need to look for a x-over cable, although I did test an earlier version of this patch. Will test in a couple days. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Acked-by: Zwane Mwaikambo <zwane@holomorphy.com> Grudgingly-acked-by: Andi Kleen <ak@muc.de> Signed-off-by: Coywolf Qi Hunt <coywolf@lovecn.org> Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * | | Merge linux-2.6 into linux-acpi-2.6 testLen Brown2005-09-03
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| * | | Auto-update from upstreamLen Brown2005-08-29
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| * | | Merge HEAD from ../from-linus Len Brown2005-08-25
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| * | | | [IA64] fix allnoconfig buildLen Brown2005-08-25
| | | | | | | | | | | | | | | | | | | | | | | | | cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | | [ACPI] delete CONFIG_ACPI_PCILen Brown2005-08-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Delete the ability to build an ACPI kernel that does not include PCI support. When such a machine is created and it requires a tuned kernel, send a patch. http://bugzilla.kernel.org/show_bug.cgi?id=1364 Signed-off-by: Len Brown <len.brown@intel.com>
| * | | | [ACPI] IA64-related ACPI Kconfig fixesLen Brown2005-08-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Build issues were mostly in the ACPI=n case -- don't do that. Select ACPI from IA64_GENERIC. Add some missing dependencies on ACPI. Mark BLACKLIST_YEAR and some laptop-only ACPI drivers as X86-only. Let me know when you get an IA64 Laptop. Signed-off-by: Len Brown <len.brown@intel.com>
| * | | | [ACPI] delete CONFIG_ACPI_BUSLen Brown2005-08-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | it is a synonym for CONFIG_ACPI Signed-off-by: Len Brown <len.brown@intel.com>
| * | | | [ACPI] delete CONFIG_ACPI_INTERPRETERLen Brown2005-08-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | it is a synonym for CONFIG_ACPI Signed-off-by: Len Brown <len.brown@intel.com>
| * | | | [ACPI] delete CONFIG_ACPI_BOOTLen Brown2005-08-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | it has been a synonym for CONFIG_ACPI since 2.6.12 Signed-off-by: Len Brown <len.brown@intel.com>
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-21 06:07:48 -0500