The patch titled
Subject: mm-fadvise-discard-partial-page-if-endbyte-is-also-eof-fix
has been added to the -mm tree. Its filename is
mm-fadvise-discard-partial-page-if-endbyte-is-also-eof-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-fadvise-discard-partial-page-if-endbyte-is-also-eof-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-fadvise-discard-partial-page-if-endbyte-is-also-eof-fix.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-fadvise-discard-partial-page-if-endbyte-is-also-eof-fix
tweak code comment
Cc: Caspar Zhang <jinli.zjl@xxxxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Oliver Yang <zhiche.yy@xxxxxxxxxxxxxxx>
Cc: shidao.ytt <shidao.ytt@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/fadvise.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff -puN mm/fadvise.c~mm-fadvise-discard-partial-page-if-endbyte-is-also-eof-fix mm/fadvise.c
--- a/mm/fadvise.c~mm-fadvise-discard-partial-page-if-endbyte-is-also-eof-fix
+++ a/mm/fadvise.c
@@ -128,12 +128,11 @@ SYSCALL_DEFINE4(fadvise64_64, int, fd, l
start_index = (offset+(PAGE_SIZE-1)) >> PAGE_SHIFT;
end_index = (endbyte >> PAGE_SHIFT);
/*
- * page at end_index will be inclusively discarded according
- * to invalidate_mapping_pages() implementation, thus, minus
- * end_index by 1 means we would skip the last page.
- * Yet, if endbyte is page-aligned, or it is at the end of
- * file, we should not skip, discarding the last page is just
- * safe enough.
+ * The page at end_index will be inclusively discarded according
+ * by invalidate_mapping_pages(), so subtracting 1 from
+ * end_index means we will skip the last page. But if endbyte
+ * is page aligned or is at the end of file, we should not skip
+ * that page - discarding the last page is safe enough.
*/
if ((endbyte & ~PAGE_MASK) != ~PAGE_MASK &&
endbyte != inode->i_size - 1) {
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
i-need-old-gcc.patch
kernel-exitc-export-abort-to-modules.patch
arm-arch-arm-include-asm-pageh-needs-personalityh.patch
mm.patch
mm-terminate-shrink_slab-loop-if-signal-is-pending-fix.patch
include-linux-sched-mmh-uninline-mmdrop_async-etc.patch
mm-split-deferred_init_range-into-initializing-and-freeing-parts-fix.patch
mm-do-not-stall-register_shrinker-fix.patch
selftest-vm-move-128tb-mmap-boundary-test-to-generic-directory-fix.patch
list_lru-prefetch-neighboring-list-entries-before-acquiring-lock-fix.patch
mm-oom-cgroup-aware-oom-killer-fix.patch
sparc64-update-pmdp_invalidate-to-return-old-pmd-value-fix.patch
x86-mm-provide-pmdp_establish-helper-fix.patch
fs-elf-drop-map_fixed-usage-from-elf_map-checkpatch-fixes.patch
mm-thp-use-down_read_trylock-in-khugepaged-to-avoid-long-block-fix.patch
mm-thp-use-down_read_trylock-in-khugepaged-to-avoid-long-block-fix-checkpatch-fixes.patch
mm-mmu_notifier-annotate-mmu-notifiers-with-blockable-invalidate-callbacks-fix.patch
mm-zsmalloc-simplify-shrinker-init-destroy-fix.patch
mm-fadvise-discard-partial-page-if-endbyte-is-also-eof-fix.patch
mm-migrate-remove-reason-argument-from-new_page_t-fix-fix.patch
lib-ubsanc-s-missaligned-misaligned.patch
linux-next-rejects.patch
tools-objtool-makefile-dont-assume-sync-checksh-is-executable.patch
kernel-forkc-export-kernel_thread-to-modules.patch
slab-leaks3-default-y.patch
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