- 22 Sep, 2009 33 commits
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KOSAKI Motohiro authored
Recently we encountered OOM problems due to memory use of the GEM cache. Generally a large amuont of Shmem/Tmpfs pages tend to create a memory shortage problem. We often use the following calculation to determine the amount of shmem pages: shmem = NR_ACTIVE_ANON + NR_INACTIVE_ANON - NR_ANON_PAGES however the expression does not consider isolated and mlocked pages. This patch adds explicit accounting for pages used by shmem and tmpfs. Signed-off-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by:
Rik van Riel <riel@redhat.com> Reviewed-by:
Christoph Lameter <cl@linux-foundation.org> Acked-by:
Wu Fengguang <fengguang.wu@intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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KOSAKI Motohiro authored
The amount of memory allocated to kernel stacks can become significant and cause OOM conditions. However, we do not display the amount of memory consumed by stacks. Add code to display the amount of memory used for stacks in /proc/meminfo. Signed-off-by:
Minchan Kim <minchan.kim@gmail.com> Reviewed-by:
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KOSAKI Motohiro authored
It is often useful to know the statistics for all pages that are handled like page cache pages when looking at OOM log output. Therefore show_free_areas() should also display buffer cache statistics. Signed-off-by:
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KOSAKI Motohiro authored
show_free_areas() displays only a limited amount of zone counters. This patch includes additional counters in the display to allow easier debugging. This may be especially useful if an OOM is due to running out of DMA memory. Signed-off-by:
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Andi Kleen authored
Remove some very outdated recommendations in Documentation/memory.txt Signed-off-by:
Andi Kleen <ak@linux.intel.com> Signed-off-by:
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KOSAKI Motohiro authored
If an OOM happens, we really want to know the number of remaining reclaimable pages. So the reclaimable slab and unreclaimable slab fields should not be combined for display. Signed-off-by:
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KOSAKI Motohiro authored
page_remove_rmap() has multiple PageAnon() tests and it has deep nesting. Clean this up. Signed-off-by:
Mel Gorman <mel@csn.ul.ie> Reviewed-by:
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Lee Schermerhorn authored
I noticed that alloc_bootmem_huge_page() will only advance to the next node on failure to allocate a huge page, potentially filling nodes with huge-pages. I asked about this on linux-mm and linux-numa, cc'ing the usual huge page suspects. Mel Gorman responded: I strongly suspect that the same node being used until allocation failure instead of round-robin is an oversight and not deliberate at all. It appears to be a side-effect of a fix made way back in commit 63b4613c ["hugetlb: fix hugepage allocation with memoryless nodes"]. Prior to that patch it looked like allocations would always round-robin even when allocation was successful. This patch--factored out of my "hugetlb mempolicy" series--moves the advance of the hstate next node from which to allocate up before the test for success of the attempted allocation. Note that alloc_bootmem_huge_page() is only used for order > MAX_ORDER huge pages. I'll post a separate patch for mainline/stable, as the above mentioned "balance freeing" series renamed the next node to alloc function. Signed-off-by:
Lee Schermerhorn <lee.schermerhorn@hp.com> Reviewed-by:
Andy Whitcroft <apw@canonical.com> Reviewed-by:
Andi Kleen <andi@firstfloor.org> Signed-off-by:
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Lee Schermerhorn authored
Attempt to clarify huge page administration and usage, and updates the doucmentation to mention the balancing of huge pages across nodes when allocating and freeing. Signed-off-by:
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Lee Schermerhorn authored
Use the [modified] free_pool_huge_page() function to return unused surplus pages. This will help keep huge pages balanced across nodes between freeing of unused surplus pages and freeing of persistent huge pages [from set_max_huge_pages] by using the same node id "cursor". It also eliminates some code duplication. Signed-off-by:
David Rientjes <rientjes@google.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Eric Whitney <eric.whitney@hp.com> Signed-off-by:
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Lee Schermerhorn authored
Free huges pages from nodes in round robin fashion in an attempt to keep [persistent a.k.a static] hugepages balanced across nodes New function free_pool_huge_page() is modeled on and performs roughly the inverse of alloc_fresh_huge_page(). Replaces dequeue_huge_page() which now has no callers, so this patch removes it. Helper function hstate_next_node_to_free() uses new hstate member next_to_free_nid to distribute "frees" across all nodes with huge pages. Acked-by:
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Randy Dunlap authored
Ummark function as having kernel-doc notation, fixing the kernel-doc warning. Warning(mm/page_alloc.c:4519): No description found for parameter 'zone' Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Shaohua Li authored
In test, some pages in swap-cache can't be migrated, as they aren't rmap. unmap_and_move() ignores swap-cache page which is just read in and hasn't rmap (see the comments in the code), but swap_aops provides .migratepage. Better to migrate such pages instead of ignore them. Signed-off-by:
Shaohua Li <shaohua.li@intel.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Yakui Zhao <yakui.zhao@intel.com> Signed-off-by:
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Shaohua Li authored
To initialize hotadded node, some pages are allocated. At that time, the node hasn't memory, this makes the allocation always fail. In such case, let's allocate pages from other nodes. Signed-off-by:
Yakui Zhao <yakui.zhao@intel.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by:
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Shaohua Li authored
Pages on movable zone have two types, MIGRATE_MOVABLE and MIGRATE_RESERVE, both them can be movable, because only movable memory allocation can get pages from movable zone. This makes pages in movable zone always be able to migrate. Signed-off-by:
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Shaohua Li authored
Pages marked as isolated should not be allocated again. If such pages reside in pcp list, they can be allocated too, so there is a ping-pong memory offline frees some pages to pcp list and the pages get allocated and then memory offline frees them again, this loop will happen again and again. This should have no impact in normal code path, because in normal code path, pages in pcp list aren't isolated, and below loop will break in the first entry. Signed-off-by:
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Shaohua Li authored
In my test, 128M memory is hot added, but zone's pcp batch is 0, which is an obvious error. When pages are onlined, zone pcp should be updated accordingly. [akpm@linux-foundation.org: fix warnings] Signed-off-by:
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David Rientjes authored
When a cpuset's nodemask is updated, all attached tasks have their cached task->mems_allowed updated by a heap instead of requiring an explicit call to cpuset_update_task_memory_state(), which has since been removed in 58568d2a ("cpuset,mm: update tasks' mems_allowed in time"). Remove the obsoleted comment from the page allocator. Cc: Paul Menage <menage@google.com> Acked-by:
Miao Xie <miaox@cn.fujitsu.com> Signed-off-by:
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Johannes Weiner authored
Make use of the compiler's typechecking on !CONFIG_SWAP as well. [akpm@linux-foundation.org: build fix] Signed-off-by:
Johannes Weiner <hannes@cmpxchg.org> Reviewed-by:
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Alexey Dobriyan authored
Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Alexey Dobriyan authored
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Alexey Dobriyan authored
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Alexey Dobriyan authored
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Alexey Dobriyan authored
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Alexey Dobriyan authored
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Alexey Dobriyan authored
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Alexey Dobriyan authored
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Alexey Dobriyan authored
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Andrew Morton authored
drivers/mfd/ab3100-core.c:647: error: ab3100_init_settings causes a section type conflict Cc: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: <stable@kernel.org> Signed-off-by:
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Eric Dumazet authored
We added a new column in cpuX lines of /proc/stat, to show the amount of time spent by a cpu servicing a guest, without updating Documentation/filesystems/proc.txt Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
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Jan Kara authored
In theory it could happen that on one CPU we initialize a new inode but clearing of I_NEW | I_LOCK gets reordered before some of the initialization. Thus on another CPU we return not fully uptodate inode from iget_locked(). This seems to fix a corruption issue on ext3 mounted over NFS. [akpm@linux-foundation.org: add some commentary] Signed-off-by:
Jan Kara <jack@suse.cz> Cc: Christoph Hellwig <hch@infradead.org> Cc: <stable@kernel.org> Signed-off-by:
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Pierre Ossman authored
Remove myself as maintainer from the sdhci driver and steer people towards the new MMC list for discussing it. Signed-off-by:
Pierre Ossman <pierre@ossman.eu> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
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Andrew Morton authored
alpha: drivers/media/dvb/pt1/pt1.c: In function 'pt1_cleanup_tables': drivers/media/dvb/pt1/pt1.c:422: error: implicit declaration of function 'vfree' drivers/media/dvb/pt1/pt1.c: In function 'pt1_init_tables': drivers/media/dvb/pt1/pt1.c:431: error: implicit declaration of function 'vmalloc' drivers/media/dvb/pt1/pt1.c:431: warning: assignment makes pointer from integer without a cast Acked-by:
Mauro Carvalho Chehab <mchehab@infradead.org> Signed-off-by:
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- 21 Sep, 2009 7 commits
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Linus Torvalds authored
Merge branch 'perfcounters-rename-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-rename-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf: Tidy up after the big rename perf: Do the big rename: Performance Counters -> Performance Events perf_counter: Rename 'event' to event_id/hw_event perf_counter: Rename list_entry -> group_entry, counter_list -> group_list Manually resolved some fairly trivial conflicts with the tracing tree in include/trace/ftrace.h and kernel/trace/trace_syscalls.c.
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Linus Torvalds authored
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: rcu: Fix whitespace inconsistencies rcu: Fix thinko, actually initialize full tree rcu: Apply results of code inspection of kernel/rcutree_plugin.h rcu: Add WARN_ON_ONCE() consistency checks covering state transitions rcu: Fix synchronize_rcu() for TREE_PREEMPT_RCU rcu: Simplify rcu_read_unlock_special() quiescent-state accounting rcu: Add debug checks to TREE_PREEMPT_RCU for premature grace periods rcu: Kconfig help needs to say that TREE_PREEMPT_RCU scales down rcutorture: Occasionally delay readers enough to make RCU force_quiescent_state rcu: Initialize multi-level RCU grace periods holding locks rcu: Need to update rnp->gpnum if preemptable RCU is to be reliable
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Linus Torvalds authored
Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf_counter, powerpc, sparc: Fix compilation after perf_counter_overflow() change perf_counter: x86: Fix PMU resource leak perf util: SVG performance improvements perf util: Make the timechart SVG width dynamic perf timechart: Show the duration of scheduler delays in the SVG perf timechart: Show the name of the waker/wakee in timechart
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Linus Torvalds authored
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Simplify sys_sched_rr_get_interval() system call sched: Fix potential NULL derference of doms_cur sched: Fix raciness in runqueue_is_locked() sched: Re-add lost cpu_allowed check to sched_fair.c::select_task_rq_fair() sched: Remove unneeded indentation in sched_fair.c::place_entity()
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Linus Torvalds authored
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file tracing: Export trace_profile_buf symbols tracing/events: use list_for_entry_continue tracing: remove max_tracer_type_len function-graph: use ftrace_graph_funcs directly tracing: Remove markers tracing: Allocate the ftrace event profile buffer dynamically tracing: Factorize the events profile accounting
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Linus Torvalds authored
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Print the hypervisor returned tsc_khz during boot x86: Correct segment permission flags in 64-bit linker script x86: cpuinit-annotate SMP boot trampolines properly x86: Increase timeout for EHCI debug port reset completion in early printk x86: Fix uaccess_32.h typo x86: Trivial whitespace cleanups x86, apic: Fix missed handling of discrete apics x86/i386: Remove duplicated #include x86, mtrr: Convert loop to a while based construct, avoid naked semicolon Revert 'x86: Fix system crash when loading with "reservetop" parameter' x86, mce: Fix compile warning in case of CONFIG_SMP=n x86, apic: Use logical flat on intel with <= 8 logical cpus x86: SGI UV: Map MMIO-High memory range x86: SGI UV: Add volatile semantics to macros that access chipset registers x86: SGI UV: Fix IPI macros x86: apic: Convert BUG() to BUG_ON() x86: Remove final bits of CONFIG_X86_OLD_MCE
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git://git.kernel.dk/linux-2.6-blockLinus Torvalds authored
* 'writeback' of git://git.kernel.dk/linux-2.6-block: nfs: initialize the backing_dev_info when creating the server writeback: make balance_dirty_pages() gradually back more off writeback: don't use schedule_timeout() without setting runstate nfs: nfs_kill_super() should call bdi_unregister() after killing super
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