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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2007-10-17 02:25:48 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 11:42:45 -0400
commit69cb51d18c1ed593009d9a620cac49d0dcf15dc8 (patch)
treef26a1245b638e7421a0afd93305fd1c556867d49 /mm/page-writeback.c
parentc9e51e4180696aa67915ec5665e4ec74125565de (diff)
mm: count writeback pages per BDI
Count per BDI writeback pages. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page-writeback.c')
-rw-r--r--mm/page-writeback.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 9b3c4ee62abf..f1d201fdcf9c 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -979,14 +979,18 @@ int test_clear_page_writeback(struct page *page)
979 int ret; 979 int ret;
980 980
981 if (mapping) { 981 if (mapping) {
982 struct backing_dev_info *bdi = mapping->backing_dev_info;
982 unsigned long flags; 983 unsigned long flags;
983 984
984 write_lock_irqsave(&mapping->tree_lock, flags); 985 write_lock_irqsave(&mapping->tree_lock, flags);
985 ret = TestClearPageWriteback(page); 986 ret = TestClearPageWriteback(page);
986 if (ret) 987 if (ret) {
987 radix_tree_tag_clear(&mapping->page_tree, 988 radix_tree_tag_clear(&mapping->page_tree,
988 page_index(page), 989 page_index(page),
989 PAGECACHE_TAG_WRITEBACK); 990 PAGECACHE_TAG_WRITEBACK);
991 if (bdi_cap_writeback_dirty(bdi))
992 __dec_bdi_stat(bdi, BDI_WRITEBACK);
993 }
990 write_unlock_irqrestore(&mapping->tree_lock, flags); 994 write_unlock_irqrestore(&mapping->tree_lock, flags);
991 } else { 995 } else {
992 ret = TestClearPageWriteback(page); 996 ret = TestClearPageWriteback(page);
@@ -1002,14 +1006,18 @@ int test_set_page_writeback(struct page *page)
1002 int ret; 1006 int ret;
1003 1007
1004 if (mapping) { 1008 if (mapping) {
1009 struct backing_dev_info *bdi = mapping->backing_dev_info;
1005 unsigned long flags; 1010 unsigned long flags;
1006 1011
1007 write_lock_irqsave(&mapping->tree_lock, flags); 1012 write_lock_irqsave(&mapping->tree_lock, flags);
1008 ret = TestSetPageWriteback(page); 1013 ret = TestSetPageWriteback(page);
1009 if (!ret) 1014 if (!ret) {
1010 radix_tree_tag_set(&mapping->page_tree, 1015 radix_tree_tag_set(&mapping->page_tree,
1011 page_index(page), 1016 page_index(page),
1012 PAGECACHE_TAG_WRITEBACK); 1017 PAGECACHE_TAG_WRITEBACK);
1018 if (bdi_cap_writeback_dirty(bdi))
1019 __inc_bdi_stat(bdi, BDI_WRITEBACK);
1020 }
1013 if (!PageDirty(page)) 1021 if (!PageDirty(page))
1014 radix_tree_tag_clear(&mapping->page_tree, 1022 radix_tree_tag_clear(&mapping->page_tree,
1015 page_index(page), 1023 page_index(page),