Count per BDI reclaimable pages; nr_reclaimable = nr_dirty + nr_unstable. Signed-off-by: Peter Zijlstra --- fs/buffer.c | 2 ++ fs/nfs/write.c | 7 +++++++ include/linux/backing-dev.h | 1 + mm/page-writeback.c | 4 ++++ mm/truncate.c | 2 ++ 5 files changed, 16 insertions(+) Index: linux-2.6/fs/buffer.c =================================================================== --- linux-2.6.orig/fs/buffer.c +++ linux-2.6/fs/buffer.c @@ -697,6 +697,8 @@ static int __set_page_dirty(struct page if (mapping_cap_account_dirty(mapping)) { __inc_zone_page_state(page, NR_FILE_DIRTY); + __inc_bdi_stat(mapping->backing_dev_info, + BDI_RECLAIMABLE); 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 @@ -827,6 +827,8 @@ int __set_page_dirty_nobuffers(struct pa WARN_ON_ONCE(!PagePrivate(page) && !PageUptodate(page)); if (mapping_cap_account_dirty(mapping)) { __inc_zone_page_state(page, NR_FILE_DIRTY); + __inc_bdi_stat(mapping->backing_dev_info, + BDI_RECLAIMABLE); task_io_account_write(PAGE_CACHE_SIZE); } radix_tree_tag_set(&mapping->page_tree, @@ -961,6 +963,8 @@ int clear_page_dirty_for_io(struct page */ if (TestClearPageDirty(page)) { dec_zone_page_state(page, NR_FILE_DIRTY); + dec_bdi_stat(mapping->backing_dev_info, + BDI_RECLAIMABLE); return 1; } return 0; Index: linux-2.6/mm/truncate.c =================================================================== --- linux-2.6.orig/mm/truncate.c +++ linux-2.6/mm/truncate.c @@ -72,6 +72,8 @@ 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_RECLAIMABLE); if (account_size) task_io_account_cancelled_write(account_size); } Index: linux-2.6/fs/nfs/write.c =================================================================== --- linux-2.6.orig/fs/nfs/write.c +++ linux-2.6/fs/nfs/write.c @@ -464,6 +464,7 @@ nfs_mark_request_commit(struct nfs_page NFS_PAGE_TAG_COMMIT); spin_unlock(&inode->i_lock); inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); + inc_bdi_stat(req->wb_page->mapping->backing_dev_info, BDI_RECLAIMABLE); __mark_inode_dirty(inode, I_DIRTY_DATASYNC); } @@ -550,6 +551,8 @@ static void nfs_cancel_commit_list(struc while(!list_empty(head)) { req = nfs_list_entry(head->next); dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); + dec_bdi_stat(req->wb_page->mapping->backing_dev_info, + BDI_RECLAIMABLE); nfs_list_remove_request(req); clear_bit(PG_NEED_COMMIT, &(req)->wb_flags); nfs_inode_remove_request(req); @@ -1210,6 +1213,8 @@ nfs_commit_list(struct inode *inode, str nfs_list_remove_request(req); nfs_mark_request_commit(req); dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); + dec_bdi_stat(req->wb_page->mapping->backing_dev_info, + BDI_RECLAIMABLE); nfs_clear_page_tag_locked(req); } return -ENOMEM; @@ -1235,6 +1240,8 @@ static void nfs_commit_done(struct rpc_t nfs_list_remove_request(req); clear_bit(PG_NEED_COMMIT, &(req)->wb_flags); dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); + dec_bdi_stat(req->wb_page->mapping->backing_dev_info, + BDI_RECLAIMABLE); dprintk("NFS: commit (%s/%Ld %d@%Ld)", req->wb_context->path.dentry->d_inode->i_sb->s_id, 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 @@ -27,6 +27,7 @@ enum bdi_state { typedef int (congested_fn)(void *, int); enum bdi_stat_item { + BDI_RECLAIMABLE, 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/