From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Sun, 17 Jun 2007 20:02:34 +0000 (-0400)
Subject: NFS: reduce latency by using conditional rescheduling in nfs_scan_list
X-Git-Tag: archive/raspbian/4.9.13-1+rpi1~10^2~36658^2~101
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/www.github.com/%22bookmarks:///%22http:/www.example.com/cgi/%22https:/www.github.com/%22bookmarks:/?a=commitdiff_plain;h=edc05fc1c24ba49dae585da1b2a22686f0b221f0;p=linux-4.9.git

NFS: reduce latency by using conditional rescheduling in nfs_scan_list

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 68f6bf122006..8d2642f24b8f 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -429,7 +429,8 @@ int nfs_scan_list(struct nfs_inode *nfsi,
 					goto out;
 			}
 		}
-
+		/* for latency reduction */
+		cond_resched_lock(&nfsi->req_lock);
 	}
 out:
 	return res;