From 83715ad54fad5a7ed330110f83e31ae92630e9d9 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 5 Jul 2006 13:17:12 -0400 Subject: NFS: Fix NFS page_state usage The introduction of the FLUSH_INVALIDATE argument to nfs_sync_inode_wait() does not clear the nr_unstable page state counter for pages that are being released. Also fix a longstanding similar bug when nfs_commit_list() fails. Signed-off-by: Trond Myklebust --- fs/nfs/write.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) (limited to 'fs/nfs/write.c') diff --git a/fs/nfs/write.c b/fs/nfs/write.c index bca5734ca9fb..86bac6a5008e 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -578,7 +578,7 @@ static int nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, un return ret; } -static void nfs_cancel_requests(struct list_head *head) +static void nfs_cancel_dirty_list(struct list_head *head) { struct nfs_page *req; while(!list_empty(head)) { @@ -589,6 +589,19 @@ static void nfs_cancel_requests(struct list_head *head) } } +static void nfs_cancel_commit_list(struct list_head *head) +{ + struct nfs_page *req; + + while(!list_empty(head)) { + req = nfs_list_entry(head->next); + nfs_list_remove_request(req); + nfs_inode_remove_request(req); + nfs_clear_page_writeback(req); + dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); + } +} + /* * nfs_scan_dirty - Scan an inode for dirty requests * @inode: NFS inode to scan @@ -1381,6 +1394,7 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how) nfs_list_remove_request(req); nfs_mark_request_commit(req); nfs_clear_page_writeback(req); + dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); } return -ENOMEM; } @@ -1499,7 +1513,7 @@ int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start, if (pages != 0) { spin_unlock(&nfsi->req_lock); if (how & FLUSH_INVALIDATE) - nfs_cancel_requests(&head); + nfs_cancel_dirty_list(&head); else ret = nfs_flush_list(inode, &head, pages, how); spin_lock(&nfsi->req_lock); @@ -1512,7 +1526,7 @@ int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start, break; if (how & FLUSH_INVALIDATE) { spin_unlock(&nfsi->req_lock); - nfs_cancel_requests(&head); + nfs_cancel_commit_list(&head); spin_lock(&nfsi->req_lock); continue; } -- cgit v1.2.1