Count per BDI dirty pages. Signed-off-by: Peter Zijlstra --- fs/buffer.c | 1 + include/linux/backing-dev.h | 1 + mm/page-writeback.c | 2 ++ mm/truncate.c | 1 + 4 files changed, 5 insertions(+) Index: linux-2.6/fs/buffer.c =================================================================== --- linux-2.6.orig/fs/buffer.c +++ linux-2.6/fs/buffer.c @@ -732,6 +732,7 @@ int __set_page_dirty_buffers(struct page if (page->mapping) { /* Race with truncate? */ if (mapping_cap_account_dirty(mapping)) { __inc_zone_page_state(page, NR_FILE_DIRTY); + __inc_bdi_stat(mapping->backing_dev_info, BDI_DIRTY); task_io_account_write(PAGE_CACHE_SIZE); } radix_tree_tag_set(&mapping->page_tree, Index: linux-2.6/mm/page-writeback.c =================================================================== --- linux-2.6.orig/mm/page-writeback.c +++ linux-2.6/mm/page-writeback.c @@ -766,6 +766,7 @@ int __set_page_dirty_nobuffers(struct pa BUG_ON(mapping2 != mapping); if (mapping_cap_account_dirty(mapping)) { __inc_zone_page_state(page, NR_FILE_DIRTY); + __inc_bdi_stat(mapping->backing_dev_info, BDI_DIRTY); task_io_account_write(PAGE_CACHE_SIZE); } radix_tree_tag_set(&mapping->page_tree, @@ -892,6 +893,7 @@ int clear_page_dirty_for_io(struct page set_page_dirty(page); if (TestClearPageDirty(page)) { dec_zone_page_state(page, NR_FILE_DIRTY); + dec_bdi_stat(mapping->backing_dev_info, BDI_DIRTY); return 1; } return 0; Index: linux-2.6/mm/truncate.c =================================================================== --- linux-2.6.orig/mm/truncate.c +++ linux-2.6/mm/truncate.c @@ -71,6 +71,7 @@ void cancel_dirty_page(struct page *page struct address_space *mapping = page->mapping; if (mapping && mapping_cap_account_dirty(mapping)) { dec_zone_page_state(page, NR_FILE_DIRTY); + dec_bdi_stat(mapping->backing_dev_info, BDI_DIRTY); if (account_size) task_io_account_cancelled_write(account_size); } Index: linux-2.6/include/linux/backing-dev.h =================================================================== --- linux-2.6.orig/include/linux/backing-dev.h +++ linux-2.6/include/linux/backing-dev.h @@ -23,6 +23,7 @@ enum bdi_state { }; enum bdi_stat_item { + BDI_DIRTY, NR_BDI_STAT_ITEMS }; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/