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| author | Miklos Szeredi <mszeredi@suse.cz> | 2008-04-28 02:12:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-28 08:58:20 -0700 |
| commit | ac6aadb24b7d4f0e54246732e221c102073412bf (patch) | |
| tree | 1936c3e847fca977b8c0d650416c66655f7633ad | |
| parent | f05111f50105ac479a008cf85749cf9c956453ea (diff) | |
| download | linux-ac6aadb24b7d4f0e54246732e221c102073412bf.tar.bz2 | |
mm: rotate_reclaimable_page() cleanup
Clean up messy conditional calling of test_clear_page_writeback() from both
rotate_reclaimable_page() and end_page_writeback().
The only user of rotate_reclaimable_page() is end_page_writeback() so this is
OK.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/swap.h | 2 | ||||
| -rw-r--r-- | mm/filemap.c | 10 | ||||
| -rw-r--r-- | mm/swap.c | 37 |
3 files changed, 19 insertions, 30 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index 4286e7ac2b00..0b3377650c85 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -177,7 +177,7 @@ extern void activate_page(struct page *); extern void mark_page_accessed(struct page *); extern void lru_add_drain(void); extern int lru_add_drain_all(void); -extern int rotate_reclaimable_page(struct page *page); +extern void rotate_reclaimable_page(struct page *page); extern void swap_setup(void); /* linux/mm/vmscan.c */ diff --git a/mm/filemap.c b/mm/filemap.c index 07e9d9258b48..239d36163bbe 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -576,10 +576,12 @@ EXPORT_SYMBOL(unlock_page); */ void end_page_writeback(struct page *page) { - if (!TestClearPageReclaim(page) || rotate_reclaimable_page(page)) { - if (!test_clear_page_writeback(page)) - BUG(); - } + if (TestClearPageReclaim(page)) + rotate_reclaimable_page(page); + + if (!test_clear_page_writeback(page)) + BUG(); + smp_mb__after_clear_bit(); wake_up_page(page, PG_writeback); } diff --git a/mm/swap.c b/mm/swap.c index aa1139ccf3a7..91e194445a5e 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -132,34 +132,21 @@ static void pagevec_move_tail(struct pagevec *pvec) * Writeback is about to end against a page which has been marked for immediate * reclaim. If it still appears to be reclaimable, move it to the tail of the * inactive list. - * - * Returns zero if it cleared PG_writeback. */ -int rotate_reclaimable_page(struct page *page) +void rotate_reclaimable_page(struct page *page) { - struct pagevec *pvec; - unsigned long flags; - - if (PageLocked(page)) - return 1; - if (PageDirty(page)) - return 1; - if (PageActive(page)) - return 1; - if (!PageLRU(page)) - return 1; - - page_cache_get(page); - local_irq_save(flags); - pvec = &__get_cpu_var(lru_rotate_pvecs); - if (!pagevec_add(pvec, page)) - pagevec_move_tail(pvec); - local_irq_restore(flags); - - if (!test_clear_page_writeback(page)) - BUG(); + if (!PageLocked(page) && !PageDirty(page) && !PageActive(page) && + PageLRU(page)) { + struct pagevec *pvec; + unsigned long flags; - return 0; + page_cache_get(page); + local_irq_save(flags); + pvec = &__get_cpu_var(lru_rotate_pvecs); + if (!pagevec_add(pvec, page)) + pagevec_move_tail(pvec); + local_irq_restore(flags); + } } /* |