NFS: Allow multiple commit requests in flight per file
Allow synchronous RPC calls to wait for pending RPC calls to finish,
but also allow asynchronous ones to just fire off another commit.
With this patch, the xfstests generic/074 test completes in 226s
instead of 242s
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 93e2364..e6ef80e 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -514,7 +514,7 @@
* so it will not block due to pages that will shortly be freeable.
*/
nfsi = NFS_I(mapping->host);
- if (test_bit(NFS_INO_COMMIT, &nfsi->flags)) {
+ if (atomic_read(&nfsi->commit_info.rpcs_out)) {
*writeback = true;
return;
}