From f3d47a3a6a1484a93c8cfe1e8c8d4399c95199c7 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Thu, 5 Jun 2008 15:17:39 -0400 Subject: [PATCH] NFS: Fix a preemption count leak in nfs_update_request The commit 2785259631697ebb0749a3782cca206e2e542939 (nfs: use GFP_NOFS preloads for radix-tree insertion) appears to have introduced a bug: We only want to call radix_tree_preload() once after creating a request. Calling it every time we loop after we created the request, will cause preemption count leaks. Signed-off-by: Trond Myklebust Cc: Nick Piggin --- fs/nfs/write.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/fs/nfs/write.c b/fs/nfs/write.c index f333848fd3be..dc62bc504693 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -584,13 +584,6 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx, /* Loop over all inode entries and see if we find * A request for the page we wish to update */ - if (new) { - if (radix_tree_preload(GFP_NOFS)) { - nfs_release_request(new); - return ERR_PTR(-ENOMEM); - } - } - spin_lock(&inode->i_lock); req = nfs_page_find_request_locked(page); if (req) { @@ -630,6 +623,10 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx, new = nfs_create_request(ctx, inode, page, offset, bytes); if (IS_ERR(new)) return new; + if (radix_tree_preload(GFP_NOFS)) { + nfs_release_request(new); + return ERR_PTR(-ENOMEM); + } } /* We have a request for our page. -- 2.20.1