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Groups > linux.kernel > #1232161
| From | "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 07/16] page-flags: define behavior SL*B-related flags on compound pages |
| Date | 2015-09-24 17:00 +0200 |
| Message-ID | <qcga8-6cP-59@gated-at.bofh.it> (permalink) |
| References | <qbhUB-3qy-7@gated-at.bofh.it> <qcga6-6cP-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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> --- 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 10b75615ddf2..c9cd82310e2d 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -254,7 +254,8 @@ 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 */ @@ -264,8 +265,6 @@ 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. -- 2.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH 07/16] page-flags: define behavior SL*B-related flags on compound pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2015-09-24 17:00 +0200
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