The patch titled
Subject: mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix-fix
has been added to the -mm tree. Its filename is
mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix-fix.patch
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From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix-fix
grab better comment from the v3 patch
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Robin Dong <sanbai@xxxxxxxxxx>
Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swap.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff -puN mm/swap.c~mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix-fix mm/swap.c
--- a/mm/swap.c~mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix-fix
+++ a/mm/swap.c
@@ -447,8 +447,12 @@ void mark_page_accessed(struct page *pag
EXPORT_SYMBOL(mark_page_accessed);
/*
- * Check the pagevec space before adding a new page into it, to prevent
- * nonuniform page status in mark_page_accessed() after __lru_cache_add().
+ * Order of operations is important: flush the pagevec when it's already
+ * full, not when adding the last page, to make sure that last page is
+ * not added to the LRU directly when passed to this function. Because
+ * mark_page_accessed() (called after this when writing) only activates
+ * pages that are on the LRU, linear writes in subpage chunks would see
+ * every PAGEVEC_SIZE page activated, which is unexpected.
*/
void __lru_cache_add(struct page *page, enum lru_list lru)
{
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
mm-hugetlbfs-correctly-populate-shared-pmd-fix.patch
arch-x86-platform-iris-irisc-register-a-platform-device-and-a-platform-driver.patch
audith-replace-defines-with-c-stubs.patch
thermal-add-generic-cpufreq-cooling-implementation.patch
thermal-exynos5-add-exynos5-thermal-sensor-driver-support.patch
thermal-exynos-register-the-tmu-sensor-with-the-kernel-thermal-layer.patch
mm-slab_commonc-restructure-kmem_cache_create-to-move-debug-cache-integrity-checks-into-a-new-function.patch
mm.patch
x86-pat-separate-the-pfn-attribute-tracking-for-remap_pfn_range-and-vm_insert_pfn-fix.patch
mm-kill-vma-flag-vm_reserved-and-mm-reserved_vm-counter-fix.patch
mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix.patch
mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix-fix.patch
rbtree-performance-and-correctness-test-fix.patch
drivers-firmware-dmi_scanc-check-dmi-version-when-get-system-uuid-fix.patch
drivers-firmware-dmi_scanc-fetch-dmi-version-from-smbios-if-it-exists-checkpatch-fixes.patch
rtc-add-dallas-ds2404-driver-fix.patch
journal_add_journal_head-debug.patch
mutex-subsystem-synchro-test-module-fix.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
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