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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2006-09-25 23:30:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:48:44 -0700 |
| commit | edc79b2a46ed854595e40edcf3f8b37f9f14aa3f (patch) | |
| tree | c1120bebede9660ab00f9439aa7a84ab9434ac38 | |
| parent | d08b3851da41d0ee60851f2c75b118e1f7a5fc89 (diff) | |
| download | linux-edc79b2a46ed854595e40edcf3f8b37f9f14aa3f.tar.gz | |
[PATCH] mm: balance dirty pages
Now that we can detect writers of shared mappings, throttle them. Avoids OOM
by surprise.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/linux/writeback.h | 1 | ||||
| -rw-r--r-- | mm/memory.c | 5 | ||||
| -rw-r--r-- | mm/page-writeback.c | 10 |
3 files changed, 14 insertions, 2 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 0422036af4ebb2..56a23a0e7f2eb2 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -116,6 +116,7 @@ int sync_page_range(struct inode *inode, struct address_space *mapping, loff_t pos, loff_t count); int sync_page_range_nolock(struct inode *inode, struct address_space *mapping, loff_t pos, loff_t count); +void set_page_dirty_balance(struct page *page); /* pdflush.c */ extern int nr_pdflush_threads; /* Global so it can be exported to sysctl diff --git a/mm/memory.c b/mm/memory.c index fa941b169071d4..dd7d7fc5ed6092 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -49,6 +49,7 @@ #include <linux/module.h> #include <linux/delayacct.h> #include <linux/init.h> +#include <linux/writeback.h> #include <asm/pgalloc.h> #include <asm/uaccess.h> @@ -1571,7 +1572,7 @@ gotten: unlock: pte_unmap_unlock(page_table, ptl); if (dirty_page) { - set_page_dirty(dirty_page); + set_page_dirty_balance(dirty_page); put_page(dirty_page); } return ret; @@ -2218,7 +2219,7 @@ retry: unlock: pte_unmap_unlock(page_table, ptl); if (dirty_page) { - set_page_dirty(dirty_page); + set_page_dirty_balance(dirty_page); put_page(dirty_page); } return ret; diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 1c87430b7a25ea..b9f4c6f1be8603 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -244,6 +244,16 @@ static void balance_dirty_pages(struct address_space *mapping) pdflush_operation(background_writeout, 0); } +void set_page_dirty_balance(struct page *page) +{ + if (set_page_dirty(page)) { + struct address_space *mapping = page_mapping(page); + + if (mapping) + balance_dirty_pages_ratelimited(mapping); + } +} + /** * balance_dirty_pages_ratelimited_nr - balance dirty memory state * @mapping: address_space which was dirtied |