Subject: + mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible-fix.patch added to -mm tree
To: mgorman@xxxxxxx,prabhakar.csengg@xxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 20 May 2014 12:35:26 -0700
The patch titled
Subject: mm: non-atomically mark page accessed during page cache allocation where possible -fix
has been added to the -mm tree. Its filename is
mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible-fix.patch
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From: Mel Gorman <mgorman@xxxxxxx>
Subject: mm: non-atomically mark page accessed during page cache allocation where possible -fix
Prabhakar Lad reported the following problem
I see following issue on DA850 evm,
git bisect points me to
commit id: 975c3a671f11279441006a29a19f55ccc15fb320
( mm: non-atomically mark page accessed during page cache allocation
where possible)
Unable to handle kernel paging request at virtual address 30e03501
pgd = c68cc000
[30e03501] *pgd=00000000
Internal error: Oops: 1 [#1] PREEMPT ARM
Modules linked in:
CPU: 0 PID: 1015 Comm: network.sh Not tainted 3.15.0-rc5-00323-g975c3a6 #9
task: c70c4e00 ti: c73d0000 task.ti: c73d0000
PC is at init_page_accessed+0xc/0x24
LR is at shmem_write_begin+0x54/0x60
pc : [<c0088aa0>] lr : [<c00923e8>] psr: 20000013
sp : c73d1d90 ip : c73d1da0 fp : c73d1d9c
r10: c73d1dec r9 : 00000000 r8 : 00000000
r7 : c73d1e6c r6 : c694d7bc r5 : ffffffe4 r4 : c73d1dec
r3 : c73d0000 r2 : 00000001 r1 : 00000000 r0 : 30e03501
Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control: 0005317f Table: c68cc000 DAC: 00000015
Process network.sh (pid: 1015, stack limit = 0xc73d01c0)
pagep is set but not pointing to anywhere valid as it's an uninitialised
stack variable. This patch is a fix to
mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible.patch
Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Reported-by: Prabhakar Lad <prabhakar.csengg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/filemap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/filemap.c~mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible-fix mm/filemap.c
--- a/mm/filemap.c~mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible-fix
+++ a/mm/filemap.c
@@ -2485,7 +2485,7 @@ ssize_t generic_perform_write(struct fil
flags |= AOP_FLAG_UNINTERRUPTIBLE;
do {
- struct page *page;
+ struct page *page = NULL;
unsigned long offset; /* Offset into pagecache page */
unsigned long bytes; /* Bytes to write to page */
size_t copied; /* Bytes copied from user */
_
Patches currently in -mm which might be from mgorman@xxxxxxx are
x86-require-x86-64-for-automatic-numa-balancing.patch
x86-define-_page_numa-by-reusing-software-bits-on-the-pmd-and-pte-levels.patch
x86-define-_page_numa-by-reusing-software-bits-on-the-pmd-and-pte-levels-fix-2.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
mm-compactionc-isolate_freepages_block-small-tuneup.patch
mm-only-force-scan-in-reclaim-when-none-of-the-lrus-are-big-enough.patch
mm-huge_memoryc-complete-conversion-to-pr_foo.patch
mm-disable-zone_reclaim_mode-by-default.patch
mm-page_alloc-do-not-cache-reclaim-distances.patch
mm-page_alloc-do-not-cache-reclaim-distances-fix.patch
mm-page_alloc-prevent-migrate_reserve-pages-from-being-misplaced.patch
mm-compaction-clean-up-unused-code-lines.patch
mm-compaction-cleanup-isolate_freepages.patch
mm-compaction-cleanup-isolate_freepages-fix.patch
mm-compaction-cleanup-isolate_freepages-fix-2.patch
mm-compaction-cleanup-isolate_freepages-fix3.patch
mm-swapc-clean-up-lru_cache_add-functions.patch
mm-vmscan-do-not-throttle-based-on-pfmemalloc-reserves-if-node-has-no-zone_normal.patch
mm-vmscan-do-not-throttle-based-on-pfmemalloc-reserves-if-node-has-no-zone_normal-checkpatch-fixes.patch
mm-vmscan-do-not-throttle-based-on-pfmemalloc-reserves-if-node-has-no-zone_normal-fix.patch
mm-numa-add-migrated-transhuge-pages-to-lru-the-same-way-as-base-pages.patch
mm-swapc-introduce-put_refcounted_compound_page-helpers-for-spliting-put_compound_page.patch
mm-swapc-split-put_compound_page-function.patch
mm-introdule-compound_head_by_tail.patch
mm-x86-pgtable-drop-unneeded-preprocessor-ifdef.patch
mm-x86-pgtable-require-x86_64-for-soft-dirty-tracker.patch
mm-mempolicyc-parameter-doc-uniformization.patch
mm-migration-add-destination-page-freeing-callback.patch
mm-compaction-return-failed-migration-target-pages-back-to-freelist.patch
mm-compaction-add-per-zone-migration-pfn-cache-for-async-compaction.patch
mm-compaction-embed-migration-mode-in-compact_control.patch
mm-thp-avoid-excessive-compaction-latency-during-fault.patch
mm-thp-avoid-excessive-compaction-latency-during-fault-fix.patch
mm-compaction-terminate-async-compaction-when-rescheduling.patch
mm-compaction-do-not-count-migratepages-when-unnecessary.patch
mm-compaction-avoid-rescanning-pageblocks-in-isolate_freepages.patch
swap-change-swap_info-singly-linked-list-to-list_head.patch
plist-add-helper-functions.patch
plist-add-plist_requeue.patch
swap-change-swap_list_head-to-plist-add-swap_avail_head.patch
mm-page_alloc-do-not-update-zlc-unless-the-zlc-is-active.patch
mm-page_alloc-do-not-treat-a-zone-that-cannot-be-used-for-dirty-pages-as-full.patch
jump_label-expose-the-reference-count.patch
mm-page_alloc-use-jump-labels-to-avoid-checking-number_of_cpusets.patch
mm-page_alloc-use-jump-labels-to-avoid-checking-number_of_cpusets-fix.patch
mm-page_alloc-only-check-the-zone-id-check-if-pages-are-buddies.patch
mm-page_alloc-only-check-the-alloc-flags-and-gfp_mask-for-dirty-once.patch
mm-page_alloc-take-the-alloc_no_watermark-check-out-of-the-fast-path.patch
mm-page_alloc-use-word-based-accesses-for-get-set-pageblock-bitmaps.patch
mm-page_alloc-reduce-number-of-times-page_to_pfn-is-called.patch
mm-page_alloc-lookup-pageblock-migratetype-with-irqs-enabled-during-free.patch
mm-page_alloc-use-unsigned-int-for-order-in-more-places.patch
mm-page_alloc-convert-hot-cold-parameter-and-immediate-callers-to-bool.patch
mm-shmem-avoid-atomic-operation-during-shmem_getpage_gfp.patch
mm-do-not-use-atomic-operations-when-releasing-pages.patch
mm-do-not-use-unnecessary-atomic-operations-when-adding-pages-to-the-lru.patch
fs-buffer-do-not-use-unnecessary-atomic-operations-when-discarding-buffers.patch
fs-buffer-do-not-use-unnecessary-atomic-operations-when-discarding-buffers-fix.patch
mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible.patch
mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possiblefix-2.patch
mm-non-atomically-mark-page-accessed-during-page-cache-allocation-where-possible-fix.patch
mm-page_alloc-calculate-classzone_idx-once-from-the-zonelist-ref.patch
mm-page_alloc-calculate-classzone_idx-once-from-the-zonelist-ref-fix.patch
mm-avoid-unnecessary-atomic-operations-during-end_page_writeback.patch
mm-compaction-properly-signal-and-act-upon-lock-and-need_sched-contention.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu.patch
smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-fix.patch
smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5.patch
cpu-hotplug-stop-machine-plug-race-window-that-leads-to-ipi-to-offline-cpu.patch
cpu-hotplug-stop-machine-plug-race-window-that-leads-to-ipi-to-offline-cpu-v3.patch
cpu-hotplug-stop-machine-plug-race-window-that-leads-to-ipi-to-offline-cpu-v5.patch
cpu-hotplug-smp-flush-any-pending-ipi-callbacks-before-cpu-offline.patch
linux-next.patch
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