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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-05-14 01:01:45 +0000 |
|---|---|---|
| committer | Johannes Weiner <hannes@cmpxchg.org> | 2015-05-14 01:01:45 +0000 |
| commit | 67f510ca3af2e0344d1bca31b47ce8a4802abbba (patch) | |
| tree | 60dcd66acbb2d5581393fb64b4ee32fd8bec1111 | |
| parent | a9e7473aa64f5a1fa083e39c611981e11fb88a3c (diff) | |
| download | mm-next-67f510ca3af2e0344d1bca31b47ce8a4802abbba.tar.gz | |
page-flags: define PG_uptodate behavior on compound pages
We use PG_uptodate on head pages on transparent huge page.
Let's use NO_TAIL.
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/page-flags.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 6b76951d32eeec..4ce9a18c64bdb7 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -408,8 +408,9 @@ u64 stable_page_flags(struct page *page); static inline int PageUptodate(struct page *page) { - int ret = test_bit(PG_uptodate, &(page)->flags); - + int ret; + page = compound_head(page); + ret = test_bit(PG_uptodate, &(page)->flags); /* * Must ensure that the data we read out of the page is loaded * _after_ we've loaded page->flags to check for PageUptodate. @@ -426,12 +427,14 @@ static inline int PageUptodate(struct page *page) static inline void __SetPageUptodate(struct page *page) { + VM_BUG_ON_PAGE(PageTail(page), page); smp_wmb(); __set_bit(PG_uptodate, &page->flags); } static inline void SetPageUptodate(struct page *page) { + VM_BUG_ON_PAGE(PageTail(page), page); /* * Memory barrier must be issued before setting the PG_uptodate bit, * so that all previous stores issued in order to bring the page @@ -441,7 +444,7 @@ static inline void SetPageUptodate(struct page *page) set_bit(PG_uptodate, &page->flags); } -CLEARPAGEFLAG(Uptodate, uptodate, ANY) +CLEARPAGEFLAG(Uptodate, uptodate, NO_TAIL) int test_clear_page_writeback(struct page *page); int __test_set_page_writeback(struct page *page, bool keep_write); |