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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-05-14 01:01:44 +0000 |
|---|---|---|
| committer | Johannes Weiner <hannes@cmpxchg.org> | 2015-05-14 01:01:44 +0000 |
| commit | 7ced50abbf998f0c1556e165749a90573d74f2cf (patch) | |
| tree | cd08cac35a17f5e17c249b544e51b5a8fafd0684 | |
| parent | a64c54e124a8ea007c6b4ddac47711ecd6637fa3 (diff) | |
| download | mm-next-7ced50abbf998f0c1556e165749a90573d74f2cf.tar.gz | |
page-flags: define behavior SL*B-related flags on compound pages
SL*B uses compound pages and marks head pages with PG_slab.
__SetPageSlab() and __ClearPageSlab() are never called for tail pages.
The same situation with PG_slob_free in SLOB allocator.
NO_TAIL is appropriate for these flags.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/page-flags.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index d31fba87c44c04..f48670d6b71886 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -279,7 +279,8 @@ PAGEFLAG(Dirty, dirty, HEAD) TESTSCFLAG(Dirty, dirty, HEAD) PAGEFLAG(LRU, lru, HEAD) __CLEARPAGEFLAG(LRU, lru, HEAD) PAGEFLAG(Active, active, HEAD) __CLEARPAGEFLAG(Active, active, HEAD) TESTCLEARFLAG(Active, active, HEAD) -__PAGEFLAG(Slab, slab, ANY) +__PAGEFLAG(Slab, slab, NO_TAIL) +__PAGEFLAG(SlobFree, slob_free, NO_TAIL) PAGEFLAG(Checked, checked, NO_COMPOUND) /* Used by some filesystems */ PAGEFLAG(Pinned, pinned, ANY) TESTSCFLAG(Pinned, pinned, ANY) /* Xen */ PAGEFLAG(SavePinned, savepinned, ANY); /* Xen */ @@ -289,8 +290,6 @@ PAGEFLAG(SwapBacked, swapbacked, ANY) __CLEARPAGEFLAG(SwapBacked, swapbacked, ANY) __SETPAGEFLAG(SwapBacked, swapbacked, ANY) -__PAGEFLAG(SlobFree, slob_free, ANY) - /* * Private page markings that may be used by the filesystem that owns the page * for its own purposes. |