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@xxxxxxxxxxxxxxx> --- include/linux/page-flags.h | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index bdb0d0e226c4..d41c63b566b8 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. -- 2.1.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>