From: Xiubo Li <xiubli@redhat.com>
Date: Wed, 17 Jan 2024 04:42:11 +0000 (+0800)
Subject: ceph: break the check delayed cap loop every 5s
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=8d59ab0bd93c806231018a6729893bf309624262;p=ceph-client.git

ceph: break the check delayed cap loop every 5s

In some cases this may take a long time and will block renewing
the caps to MDS.

URL: https://tracker.ceph.com/issues/50223#note-21
Signed-off-by: Xiubo Li <xiubli@redhat.com>
---

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 1a4ce8ffcf1c..0ca7dce48172 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -4648,6 +4648,14 @@ unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc)
 			iput(inode);
 			spin_lock(&mdsc->cap_delay_lock);
 		}
+
+		/*
+		 * Just in case too many dirty caps or slow
+		 * performance case won't block the delayed
+		 * work to renew the caps.
+		 */
+		if (jiffies - loop_start >= 5 * HZ)
+			break;
 	}
 	spin_unlock(&mdsc->cap_delay_lock);
 	doutc(cl, "done\n");