The patch titled
mm/filemap.c: fix mark_page_accessed() logic
has been added to the -mm tree. Its filename is
mm-filemapc-fix-mark_page_accessed-logic.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
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------------------------------------------------------
Subject: mm/filemap.c: fix mark_page_accessed() logic
From: Nick Piggin <npiggin@xxxxxxx>
A change to make database style random read() workloads perform better, by
calling mark_page_accessed for some non-page-aligned reads broke the case
of < PAGE_CACHE_SIZE files, which will not get their prev_index moved past
the first page.
Combine both heuristics for marking the page accessed.
Signed-off-by: Nick Piggin <npiggin@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/filemap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/filemap.c~mm-filemapc-fix-mark_page_accessed-logic mm/filemap.c
--- a/mm/filemap.c~mm-filemapc-fix-mark_page_accessed-logic
+++ a/mm/filemap.c
@@ -928,7 +928,7 @@ page_ok:
* When (part of) the same page is read multiple times
* in succession, only mark it as accessed the first time.
*/
- if (prev_index != index)
+ if (prev_index != index || !offset)
mark_page_accessed(page);
prev_index = index;
_
Patches currently in -mm which might be from npiggin@xxxxxxx are
mm-fix-madvise-infinine-loop.patch
oom-fix-prevent-oom-from-killing-a-process-with-children-sibling-unkillable.patch
splice-dont-steal.patch
splice-dont-readpage.patch
mm-remove-gcc-workaround.patch
mm-more-rmap-checking.patch
mm-make-read_cache_page-synchronous.patch
fs-buffer-dont-pageuptodate-without-page-locked.patch
mm-debug-check-for-the-fault-vs-invalidate-race.patch
mm-debug-check-for-the-fault-vs-invalidate-race-tidy.patch
mm-simplify-filemap_nopage.patch
mm-fix-fault-vs-invalidate-race-for-linear-mappings.patch
mm-merge-populate-and-nopage-into-fault-fixes-nonlinear.patch
mm-merge-populate-and-nopage-into-fault-fixes-nonlinear-tidy.patch
mm-merge-nopfn-into-fault.patch
mm-remove-legacy-cruft.patch
mm-fix-clear_page_dirty_for_io-vs-fault-race.patch
mm-filemapc-fix-mark_page_accessed-logic.patch
exec-fix-remove_arg_zero.patch
exec-fix-remove_arg_zero-add-comment.patch
as-fix-antic_expire-check.patch
futex-restartable-futex_wait.patch
futex-restartable-futex_wait-fix.patch
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