- 11 Apr, 2006 28 commits
-
-
Ashok Raj authored
Switching to automatic bigsmp causes a misleading error message, that more then 8 cpus are detected, and user needs to select either X86_GENERICARCH or X86_BIGSMP to handle. Reason is we switched to bigsmp to avoid IP race when new cpu is comming up. [bigsmp is nothing but using physical flat mode that can work for 1 .. 255 cpus] [default is X86_PC, that uses logical flat mode up to 8 CPUs max] Current x86_64 code uses bigsmp as default when hotplug is enabled. It would be preferable to make bigsmp as default, and work the dependencies of other related code like SMP_SUSPEND, and some related to memory hotplug code for i386. Current logical flat mode doesnt use shortcuts that cause the race by using the send_IPI_mask() instead of shortcuts when HOTPLUG_CPU is enabled. In the meantime this patch is the path of lease resistance. We will switch to bigsmp default sometime soon, when we get to work it again. Signed-off-by:
Ashok Raj <ashok.raj@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Nigel Cunningham <nigel@suspend2.net> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
-
Hyok S. Choi authored
For some architectures, a few syscalls are not linked in noMMU mode. In that case, the MMU depending syscalls are needed to be defined as 'cond_syscall'. For example, ARM architecture selectively links sys_mlock by the mode configuration. In case of FRV, it has been managed by #ifdef CONFIG_MMU macro in arch/frv/kernel/entry.S. However these conditional macros are just duplicates if they were defined as cond_syscall. Compilation test is done with FRV toolchains for both of MMU and noMMU mode. Signed-off-by:
Hyok S. Choi <hyok.choi@samsung.com> Cc: David Howells <dhowells@redhat.com> Signed-off-by:
-
Randy Dunlap authored
Fix typos, spelling, etc., in Doc/vm/hugetlbpage.txt. Signed-off-by:
Randy Dunlap <rdunlap@xenotime.net> Cc: David Gibson <david@gibson.dropbear.id.au> Signed-off-by:
-
Adrian Bunk authored
EXPORT_SYMBOL'ing of a static function is not a good idea. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by:
-
Andy Whitcroft authored
Add some documentation regarding the utilisation of the flags field in struct page. This field is overloaded for per page bits and to hold node, zone and SPARSEMEM information. Make it clear which areas are used for what and how many bits are in each area. Signed-off-by:
Andy Whitcroft <apw@shadowen.org> Signed-off-by:
-
Hideo AOKI authored
This patch is an enhancement of OVERCOMMIT_GUESS algorithm in __vm_enough_memory() in mm/nommu.c. When the OVERCOMMIT_GUESS algorithm calculates the number of free pages, the algorithm subtracts the number of reserved pages from the result nr_free_pages(). Signed-off-by:
Hideo Aoki <haoki@redhat.com> Signed-off-by:
-
Hideo AOKI authored
This patch is an enhancement of OVERCOMMIT_GUESS algorithm in __vm_enough_memory() in mm/mmap.c. When the OVERCOMMIT_GUESS algorithm calculates the number of free pages, the algorithm subtracts the number of reserved pages from the result nr_free_pages(). Signed-off-by:
-
Hideo AOKI authored
These patches are an enhancement of OVERCOMMIT_GUESS algorithm in __vm_enough_memory(). - why the kernel needed patching When the kernel can't allocate anonymous pages in practice, currnet OVERCOMMIT_GUESS could return success. This implementation might be the cause of oom kill in memory pressure situation. If the Linux runs with page reservation features like /proc/sys/vm/lowmem_reserve_ratio and without swap region, I think the oom kill occurs easily. - the overall design approach in the patch When the OVERCOMMET_GUESS algorithm calculates number of free pages, the reserved free pages are regarded as non-free pages. This change helps to avoid the pitfall that the number of free pages become less than the number which the kernel tries to keep free. - testing results I tested the patches using my test kernel module. If the patches aren't applied to the kernel, __vm_enough_memory() returns success in the situation but autual page allocation is failed. On the other hand, if the patches are applied to the kernel, memory allocation failure is avoided since __vm_enough_memory() returns failure in the situation. I checked that on i386 SMP 16GB memory machine. I haven't tested on nommu environment currently. This patch adds totalreserve_pages for __vm_enough_memory(). Calculate_totalreserve_pages() checks maximum lowmem_reserve pages and pages_high in each zone. Finally, the function stores the sum of each zone to totalreserve_pages. The totalreserve_pages is calculated when the VM is initilized. And the variable is updated when /proc/sys/vm/lowmem_reserve_raito or /proc/sys/vm/min_free_kbytes are changed. Signed-off-by:
-
Christoph Lameter authored
- Remove sparse comment - Remove duplicated include - Return the correct error condition in migrate_page_remove_references(). Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
-
Ram Gupta authored
The code checks for newbrk with oldbrk which are page aligned before making a check for the memory limit set of data segment. If the memory limit is not page aligned in that case it bypasses the test for the limit if the memory allocation is still for the same page. Signed-off-by:
Ram Gupta <ram.gupta5@gmail.com> Signed-off-by:
-
Luke Yang authored
The earlier patch to consolidate mmu and nommu page allocation and refcounting by using compound pages for nommu allocations had a bug: kmalloc slabs who's pages were initially allocated by a non-__GFP_COMP allocator could be passed into mm/nommu.c kmalloc allocations which really wanted __GFP_COMP underlying pages. Fix that by having nommu pass __GFP_COMP to all higher order slab allocations. Signed-off-by:
Luke Yang <luke.adi@gmail.com> Acked-by:
Nick Piggin <npiggin@suse.de> Signed-off-by:
-
Ravikiran G Thirumalai authored
Add a statistics counter which is incremented everytime the alien cache overflows. alien_cache limit is hardcoded to 12 right now. We can use this statistics to tune alien cache if needed in the future. Signed-off-by:
Alok N Kataria <alokk@calsoftinc.com> Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
Shai Fultheim <shai@scalex86.org> Signed-off-by:
-
Ravikiran G Thirumalai authored
Allocate off-slab slab descriptors from node local memory. Signed-off-by:
-
KAMEZAWA Hiroyuki authored
for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. for sparc64. Signed-off-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by:
"David S. Miller" <davem@davemloft.net> Signed-off-by:
-
KAMEZAWA Hiroyuki authored
for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by:
-
KAMEZAWA Hiroyuki authored
for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu under /net Signed-off-by:
-
Adrian Bunk authored
This patch switches arch/i386/mach-voyager/voyager_cat.c to using named initializers for struct resource. Besides a fixing compile error in Greg's tree, it makes the code more readable. Signed-off-by:
-
NeilBrown authored
reshape_position is a 64bit field that was not 64bit aligned. So swap with new_level. NOTE: this is a user-visible change. However: - The bad code has not appeared in a released kernel - This code is still marked 'experimental' - This only affects version-1 superblock, which are not in wide use - These field are only used (rather than simply reported) by user-space tools in extemely rare circumstances : after a reshape crashes in the first second of the reshape process. So I believe that, at this stage, the change is safe. Especially if people heed the 'help' message on use mdadm-2.4.1. Signed-off-by:Neil Brown <neilb@suse.de> Signed-off-by:
-
Christoph Lameter authored
zone_pcp() only returns valid values if the processor is online. Change node_read_numastat() to only scan online processors. Signed-off-by:
-
Andrew Morton authored
fs/select.c: In function `core_sys_select': fs/select.c:339: warning: assignment from incompatible pointer type fs/select.c:376: warning: comparison of distinct pointer types lacks a cast By using a void* we can remove lots of casts rather than adding more. Cc: Jes Sorensen <jes@trained-monkey.org> Signed-off-by:
-
Mike Galbraith authored
RT tasks are being awakened on the expired array when expired_starving() is true, whereas they really should be excluded. Fix. Signed-off-by:
Mike Galbraith <efault@gmx.de> Acked-by:
Ingo Molnar <mingo@elte.hu> Cc: Con Kolivas <kernel@kolivas.org> Signed-off-by:
-
Mike Galbraith authored
Fix a starvation problem that occurs when a stream of highly interactive tasks delay an array switch for extended periods despite EXPIRED_STARVING(rq) being true. AFAIKT, the only choice is to enqueue awakening tasks on the expired array in this case. Without this patch, it can be nearly impossible to remotely login to a busy server, and interactive shell commands can starve for minutes. Also, convert the EXPIRED_STARVING macro into an inline function which humans can understand. Signed-off-by:
Con Kolivas <kernel@kolivas.org> Signed-off-by:
-
Nathan Scott authored
boundaries. SGI-PV: 951862 SGI-Modid: xfs-linux-melb:xfs-kern:25726a Signed-off-by:Nathan Scott <nathans@sgi.com>
-
Nathan Scott authored
SGI-PV: 949858 SGI-Modid: xfs-linux-melb:xfs-kern:25717a Signed-off-by:
Jes Sorensen <jes@sgi.com> Signed-off-by:
-
David Chinner authored
that have been unlinked, we may need to execute transactions during reclaim. By the time the transaction has hit the disk, the linux inode and xfs vnode may already have been freed so we can't reference them safely. Use the known xfs inode state to determine if it is safe to reference the vnode and linux inode during the unpin operation. SGI-PV: 946321 SGI-Modid: xfs-linux-melb:xfs-kern:25687a Signed-off-by:
David Chinner <dgc@sgi.com> Signed-off-by:
-
David Chinner authored
millions of inodes cached and has sparse cluster population, removing inodes from the cluster hash consumes excessive amounts of CPU time. Reduce the CPU cost by making removal O(1) via use of a double linked list for the hash chains. SGI-PV: 951551 SGI-Modid: xfs-linux-melb:xfs-kern:25683a Signed-off-by:
-
Nathan Scott authored
nonblock mode with the new IO path code (since 2.6.16). SGI-PV: 951662 SGI-Modid: xfs-linux-melb:xfs-kern:25676a Signed-off-by: -
Nathan Scott authored
Thanks to kjamieson for noticing. SGI-PV: 951661 SGI-Modid: xfs-linux-melb:xfs-kern:25675a Signed-off-by:
-
- 10 Apr, 2006 12 commits
-
-
Linus Torvalds authored
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 3473/1: Use numbers 0-15 for the VFP double registers [ARM] 3472/1: Use the D variants of FLDMIA/FSTMIA on ARMv6 [ARM] 3471/1: FTOSI functions should return 0 for NaN [ARM] 3470/1: Clear the HWCAP bits for the disabled kernel features [ARM] 3469/1: S3C24XX: clkout missing hclk selector [ARM] 3468/1: S3C2410: SMDK common include fix [ARM] 3461/1: ARM: OMAP: Fix clk_get() when using id and name [ARM] 3460/1: ARM: OMAP: Remove unnecessary nop_release() [ARM] 3459/1: ixp23xx: fix debug serial macros for big-endian operation [ARM] Allow decompressor to be built with -ffunction-sections [ARM] Fix SA110/SA1100 cache flushing [ARM] ebsa110: Fix incorrect serial port address [ARM] Fix ebsa110 debug macros [ARM] Move FLUSH_BASE macros to asm/arch/memory.h [ARM] Remove unnecessary extra parens in include/asm-arm/memory.h [ARM] arm's arch_local_page_offset() fix against 2.6.17-rc1
-
git://oss.oracle.com/home/sourcebo/git/ocfs2Linus Torvalds authored
* 'upstream-linus' of git://oss.oracle.com/home/sourcebo/git/ocfs2: [PATCH] CONFIGFS_FS must depend on SYSFS [PATCH] Bogus NULL pointer check in fs/configfs/dir.c ocfs2: Better I/O error handling in heartbeat ocfs2: test and set teardown flag early in user_dlm_destroy_lock() ocfs2: Handle the DLM_CANCELGRANT case in user_unlock_ast() ocfs2: catch an invalid ast case in dlmfs ocfs2: remove an overly aggressive BUG() in dlmfs ocfs2: multi node truncate fix
-
Eric W. Biederman authored
Oleg Nesterov spotted two interesting bugs with the current de_thread code. The simplest is a long standing double decrement of __get_cpu_var(process_counts) in __unhash_process. Caused by two processes exiting when only one was created. The other is that since we no longer detach from the thread_group list it is possible for do_each_thread when run under the tasklist_lock to see the same task_struct twice. Once on the task list as a thread_group_leader, and once on the thread list of another thread. The double appearance in do_each_thread can cause a double increment of mm_core_waiters in zap_threads resulting in problems later on in coredump_wait. To remedy those two problems this patch takes the simple approach of changing the old thread group leader into a child thread. The only routine in release_task that cares is __unhash_process, and it can be trivially seen that we handle cleaning up a thread group leader properly. Since de_thread doesn't change the pid of the exiting leader process and instead shares it with the new leader process. I change thread_group_leader to recognize group leadership based on the group_leader field and not based on pids. This should also be slightly cheaper then the existing thread_group_leader macro. I performed a quick audit and I couldn't see any user of thread_group_leader that cared about the difference. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
-
Catalin Marinas authored
Patch from Catalin Marinas This patch changes the double registers numbering to 0-15 from even 0-30, in preparation for future VFP extensions. It also fixes the VFP_REG_ZERO bug (value 16 actually represents the 8th double register with the original numbering). The original mcrr/mrrc on CP10 were generating FMRRS/FMSRR instead of FMRRD/FMDRR. The patch changes to CP11 for the correct instructions. Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk>
-
Catalin Marinas authored
Patch from Catalin Marinas The X variants are deprecated starting with ARMv6. Using the D variants, the fpmx_state in vfp_hard_struct is no longer needed. Signed-off-by:
-
Catalin Marinas authored
Patch from Catalin Marinas The NaN case was dealed with by the "exponent >= ... + 32" condition but it was not setting the value "d" to 0. Signed-off-by:
Ken'ichi Kuromusha <musha@aplix.co.jp> Signed-off-by:
-
Catalin Marinas authored
Patch from Catalin Marinas Glibc interprets the HWCAP bits and decides on what features to use. However, even if the features are present in the hardware, they are not always supported by the kernel and hence the corresponding bits have to be cleared from the elf_hwcap variable. Signed-off-by:
-
Jeff Garzik authored
-
Adrian Bunk authored
This patch fixes the a compile error with CONFIG_SYSFS=n Configfs is creating, as a matter of policy, the /sys/kernel/config mountpoint. This means it requires CONFIG_SYSFS. Signed-off-by:
Joel Becker <joel.becker@oracle.com> Signed-off-by:
Mark Fasheh <mark.fasheh@oracle.com>
-
Eric Sesterhenn authored
We check the "group" pointer after we dereference it. This check is bogus, as it cannot be NULL coming in. Signed-off-by:
-
Christoph Hellwig authored
Overriding the whole EH code is a per-transport, not per-host thing. Move ->eh_strategy_handler to the transport class, same as ->eh_timed_out. Downside is that scsi_host_alloc can't check for the total lack of EH anymore, but the transition period from old EH where we needed it is long gone already. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Jeff Garzik <jeff@garzik.org>
-
Nick Piggin authored
Rohit found an obscure bug causing buddy list corruption. page_is_buddy is using a non-atomic test (PagePrivate && page_count == 0) to determine whether or not a free page's buddy is itself free and in the buddy lists. Each of the conjuncts may be true at different times due to unrelated conditions, so the non-atomic page_is_buddy test may find each conjunct to be true even if they were not both true at the same time (ie. the page was not on the buddy lists). Signed-off-by:
Martin Bligh <mbligh@google.com> Signed-off-by:
Rohit Seth <rohitseth@google.com> Signed-off-by:
-
