diff options
Diffstat (limited to 'fs/nfs/write.c')
| -rw-r--r-- | fs/nfs/write.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c index ae26775b5448..c3f627b08ec6 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -1028,21 +1028,28 @@ int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, struct nfs_commit_info *cinfo, int max) { - struct nfs_page *req; + struct nfs_page *req, *tmp; int ret = 0; - while(!list_empty(src)) { - req = list_first_entry(src, struct nfs_page, wb_list); +restart: + list_for_each_entry_safe(req, tmp, src, wb_list) { kref_get(&req->wb_kref); if (!nfs_lock_request(req)) { int status; + + /* Prevent deadlock with nfs_lock_and_join_requests */ + if (!list_empty(dst)) { + nfs_release_request(req); + continue; + } + /* Ensure we make progress to prevent livelock */ mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); status = nfs_wait_on_request(req); nfs_release_request(req); mutex_lock(&NFS_I(cinfo->inode)->commit_mutex); if (status < 0) break; - continue; + goto restart; } nfs_request_remove_commit_list(req, cinfo); nfs_list_add_request(req, dst); |