From git-commits-head-owner@vger.kernel.org Tue Sep 26 20:23:25 2006 Date: Tue, 26 Sep 2006 15:59:54 GMT Message-Id: <200609261559.k8QFxs8b003237@hera.kernel.org> From: Linux Kernel Mailing List To: git-commits-head@vger.kernel.org Subject: [PATCH] mm: balance dirty pages commit edc79b2a46ed854595e40edcf3f8b37f9f14aa3f tree c1120bebede9660ab00f9439aa7a84ab9434ac38 parent d08b3851da41d0ee60851f2c75b118e1f7a5fc89 author Peter Zijlstra 1159252258 -0700 committer Linus Torvalds 1159285724 -0700 [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 Cc: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds include/linux/writeback.h | 1 + mm/memory.c | 5 +++-- 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 0422036..56a23a0 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -116,6 +116,7 @@ int sync_page_range(struct inode *inode, 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 fa941b1..dd7d7fc 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -49,6 +49,7 @@ #include #include #include #include +#include #include #include @@ -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 1c87430..b9f4c6f 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -244,6 +244,16 @@ static void balance_dirty_pages(struct a 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