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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-01-16 03:51:35 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-16 04:56:32 +0300
commitdcb351cd095a3a1e1100b74f15a0100cf9a0c700 (patch)
treec1df71441343eb6968d2957ab660619f4db2aff4 /include/linux/page-flags.h
parent8cb38fabb6bc1ba8bcec83eaf04848d886b54d28 (diff)
downloadlinux-dcb351cd095a3a1e1100b74f15a0100cf9a0c700.tar.xz
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. PF_NO_TAIL is appropriate for these flags. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.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: Christoph Lameter <cl@linux.com> 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> Cc: Jérôme Glisse <jglisse@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/page-flags.h')
-rw-r--r--include/linux/page-flags.h5
1 files changed, 2 insertions, 3 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 88a3bcba57d6..29d8805aaa23 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -266,7 +266,8 @@ PAGEFLAG(Dirty, dirty, PF_HEAD) TESTSCFLAG(Dirty, dirty, PF_HEAD)
PAGEFLAG(LRU, lru, PF_HEAD) __CLEARPAGEFLAG(LRU, lru, PF_HEAD)
PAGEFLAG(Active, active, PF_HEAD) __CLEARPAGEFLAG(Active, active, PF_HEAD)
TESTCLEARFLAG(Active, active, PF_HEAD)
-__PAGEFLAG(Slab, slab, PF_ANY)
+__PAGEFLAG(Slab, slab, PF_NO_TAIL)
+__PAGEFLAG(SlobFree, slob_free, PF_NO_TAIL)
PAGEFLAG(Checked, checked, PF_NO_COMPOUND) /* Used by some filesystems */
PAGEFLAG(Pinned, pinned, PF_ANY) TESTSCFLAG(Pinned, pinned, PF_ANY) /* Xen */
PAGEFLAG(SavePinned, savepinned, PF_ANY); /* Xen */
@@ -276,8 +277,6 @@ PAGEFLAG(SwapBacked, swapbacked, PF_ANY)
__CLEARPAGEFLAG(SwapBacked, swapbacked, PF_ANY)
__SETPAGEFLAG(SwapBacked, swapbacked, PF_ANY)
-__PAGEFLAG(SlobFree, slob_free, PF_ANY)
-
/*
* Private page markings that may be used by the filesystem that owns the page
* for its own purposes.