diff mbox series

[v5,2/2] NFSv4.2: remove restriction of copy size for inter-server copy.

Message ID 20210517224330.9201-3-dai.ngo@oracle.com (mailing list archive)
State New, archived
Headers show
Series NFSD: delay unmount source's export after inter-server copy completed. | expand

Commit Message

Dai Ngo May 17, 2021, 10:43 p.m. UTC 
Currently inter-server copy is allowed only if the copy size is larger
than (rsize*14) which is the over-head of the mount operation of the
source export. This patch, relying on the delayed unmount feature,
removes this restriction since the mount and unmount overhead is now
not applicable for every inter-server copy.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
---
 fs/nfs/nfs4file.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 441a2fa073c8..b5821ed46994 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -158,13 +158,11 @@  static ssize_t __nfs4_copy_file_range(struct file *file_in, loff_t pos_in,
 		sync = true;
 retry:
 	if (!nfs42_files_from_same_server(file_in, file_out)) {
-		/* for inter copy, if copy size if smaller than 12 RPC
-		 * payloads, fallback to traditional copy. There are
-		 * 14 RPCs during an NFSv4.x mount between source/dest
-		 * servers.
+		/*
+		 * for inter copy, if copy size is too small
+		 * then fallback to generic copy.
 		 */
-		if (sync ||
-			count <= 14 * NFS_SERVER(file_inode(file_in))->rsize)
+		if (sync)
 			return -EOPNOTSUPP;
 		cn_resp = kzalloc(sizeof(struct nfs42_copy_notify_res),
 				GFP_NOFS);