The patch titled
Subject: mm-madvise-update-comment-on-sys_madvise-fix
has been added to the -mm tree. Its filename is
mm-madvise-update-comment-on-sys_madvise-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-madvise-update-comment-on-sys_madvise-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-madvise-update-comment-on-sys_madvise-fix.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-madvise-update-comment-on-sys_madvise-fix
modifications suggested by Michal
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: Chen Gong <gong.chen@xxxxxxxxxxxxxxx>
Cc: Jason Baron <jbaron@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/madvise.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff -puN mm/madvise.c~mm-madvise-update-comment-on-sys_madvise-fix mm/madvise.c
--- a/mm/madvise.c~mm-madvise-update-comment-on-sys_madvise-fix
+++ a/mm/madvise.c
@@ -639,7 +639,7 @@ madvise_behavior_valid(int behavior)
* some pages ahead.
* MADV_DONTNEED - the application is finished with the given range,
* so the kernel can free resources associated with it.
- * MADV_FREE - the application marks pages in the given range as lasyfree,
+ * MADV_FREE - the application marks pages in the given range as lazy free,
* where actual purges are postponed until memory pressure happens.
* MADV_REMOVE - the application wants to free up the given range of
* pages and associated backing store.
@@ -652,10 +652,12 @@ madvise_behavior_valid(int behavior)
* MADV_MERGEABLE - the application recommends that KSM try to merge pages in
* this area with pages of identical content from other such areas.
* MADV_UNMERGEABLE- cancel MADV_MERGEABLE: no longer merge pages with others.
- * MADV_HUGEPAGE - the application wants to allocate transparent hugepages to
- * load the content of the given memory range.
- * MADV_NOHUGEPAGE - cancel MADV_HUGEPAGE: no longer allocate transparent
- * hugepages.
+ * MADV_HUGEPAGE - the application wants to back the given range by transparent
+ * huge pages in the future. Existing pages might be coalesced and
+ * new pages might be allocated as THP.
+ * MADV_NOHUGEPAGE - mark the given range as not worth being backed by
+ * transparent huge pages so the existing pages will not be
+ * coalesced into THP and new pages will not be allocated as THP.
* MADV_DONTDUMP - the application wants to prevent pages in the given range
* from being included in its core dump.
* MADV_DODUMP - cancel MADV_DONTDUMP: no longer exclude from core dump.
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
drivers-gpu-drm-i915-intel_spritec-fix-build.patch
drivers-gpu-drm-i915-intel_tvc-fix-build.patch
mm-warn-about-vmdata-over-rlimit_data-fix.patch
ocfs2-fix-ip_unaligned_aio-deadlock-with-dio-work-queue-fix.patch
ocfs2-dlm-move-lock-to-the-tail-of-grant-queue-while-doing-in-place-convert-fix.patch
mm.patch
fs-mpagec-mpage_readpages-use-lru_to_page-helper.patch
mm-page_allocc-introduce-kernelcore=mirror-option-fix.patch
mm-page_allocc-rework-code-layout-in-memmap_init_zone.patch
mm-debug-pageallocc-split-out-page-poisoning-from-debug-page_alloc-checkpatch-fixes.patch
mm-page_poisonc-enable-page_poisoning-as-a-separate-option-fix.patch
mm-page_poisoningc-allow-for-zero-poisoning-checkpatch-fixes.patch
mm-madvise-update-comment-on-sys_madvise-fix.patch
ksm-introduce-ksm_max_page_sharing-per-page-deduplication-limit-fix-2.patch
zram-export-the-number-of-available-comp-streams-fix.patch
mm-oom-rework-oom-detection-checkpatch-fixes.patch
mm-use-watermak-checks-for-__gfp_repeat-high-order-allocations-checkpatch-fixes.patch
sched-add-schedule_timeout_idle.patch
sparc-compat-provide-an-accurate-in_compat_syscall-implementation-fix.patch
sparc-compat-provide-an-accurate-in_compat_syscall-implementation-fix.patch
dma-rename-dma__writecombine-to-dma__wc-checkpatch-fixes.patch
drivers-net-wireless-intel-iwlwifi-dvm-calibc-fix-min-warning.patch
include-linux-huge_mmh-pmd_trans_huge_lock-returns-a-spinlock_t.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
kernel-forkc-export-kernel_thread-to-modules.patch
slab-leaks3-default-y.patch
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