From 1bd5d6d08ea7ed0794c8a3908383d6d6fc202cdd Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 9 Sep 2017 16:43:09 -0400 Subject: NFS: Count the bytes of skipped subrequests in nfs_lock_and_join_requests() If we skip a subrequest due to a zero refcount, we should still count the byte range that it covered so that we accurately reconstruct the original request size. Signed-off-by: Trond Myklebust --- fs/nfs/write.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'fs/nfs') diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 36d34a4c86bd..f68083db63c8 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -504,8 +504,12 @@ try_again: for (subreq = head->wb_this_page; subreq != head; subreq = subreq->wb_this_page) { - if (!kref_get_unless_zero(&subreq->wb_kref)) + if (!kref_get_unless_zero(&subreq->wb_kref)) { + if (subreq->wb_offset == head->wb_offset + total_bytes) + total_bytes += subreq->wb_bytes; continue; + } + while (!nfs_lock_request(subreq)) { /* * Unlock page to allow nfs_page_group_sync_on_bit() -- cgit v1.2.3