gfs2: Randomize GLF_VERIFY_DELETE work delay

jira LE-3201
Rebuild_History Non-Buildable kernel-rt-4.18.0-553.27.1.rt7.368.el8_10
commit-author Andreas Gruenbacher <[email protected]>
commit 085e423
Empty-Commit: Cherry-Pick Conflicts during history rebuild.
Will be included in final tarball splat. Ref for failed cherry-pick at:
ciq/ciq_backports/kernel-rt-4.18.0-553.27.1.rt7.368.el8_10/085e423b.failed

Randomize the delay of GLF_VERIFY_DELETE work.  This avoids thundering
herd problems when multiple nodes schedule that kind of work in response
to an inode being unlinked remotely.

	Signed-off-by: Andreas Gruenbacher <[email protected]>
(cherry picked from commit 085e423)
	Signed-off-by: Jonathan Maple <[email protected]>

# Conflicts:
#	fs/gfs2/glock.c

Author: PlaidCat

ciq/ciq_backports/kernel-rt-4.18.0-553.27.1.rt7.368.el8_10/085e423b.failed

@@ -0,0 +1,53 @@
+gfs2: Randomize GLF_VERIFY_DELETE work delay
+
+jira LE-3201
+Rebuild_History Non-Buildable kernel-rt-4.18.0-553.27.1.rt7.368.el8_10
+commit-author Andreas Gruenbacher <[email protected]>
+commit 085e423b4d51dfe71e1967c9e508d1cb845063d3
+Empty-Commit: Cherry-Pick Conflicts during history rebuild.
+Will be included in final tarball splat. Ref for failed cherry-pick at:
+ciq/ciq_backports/kernel-rt-4.18.0-553.27.1.rt7.368.el8_10/085e423b.failed
+
+Randomize the delay of GLF_VERIFY_DELETE work.  This avoids thundering
+herd problems when multiple nodes schedule that kind of work in response
+to an inode being unlinked remotely.
+
+	Signed-off-by: Andreas Gruenbacher <[email protected]>
+(cherry picked from commit 085e423b4d51dfe71e1967c9e508d1cb845063d3)
+	Signed-off-by: Jonathan Maple <[email protected]>
+
+# Conflicts:
+#	fs/gfs2/glock.c
+diff --cc fs/gfs2/glock.c
+index b399506f380a,46a6e97cd930..000000000000
+--- a/fs/gfs2/glock.c
++++ b/fs/gfs2/glock.c
+@@@ -36,6 -33,10 +36,13 @@@
+  #include <linux/list_sort.h>
+  #include <linux/lockref.h>
+  #include <linux/rhashtable.h>
+++<<<<<<< HEAD
+++=======
++ #include <linux/pid_namespace.h>
++ #include <linux/fdtable.h>
++ #include <linux/file.h>
++ #include <linux/random.h>
+++>>>>>>> 085e423b4d51 (gfs2: Randomize GLF_VERIFY_DELETE work delay)
+  
+  #include "gfs2.h"
+  #include "incore.h"
+@@@ -982,8 -1018,9 +989,13 @@@ static bool gfs2_queue_verify_delete(st
+  
+  	if (test_and_set_bit(GLF_VERIFY_DELETE, &gl->gl_flags))
+  		return false;
+++<<<<<<< HEAD
+ +	return queue_delayed_work(sdp->sd_delete_wq,
+ +				  &gl->gl_delete, 5 * HZ);
+++=======
++ 	delay = later ? HZ + get_random_long() % (HZ * 9) : 0;
++ 	return queue_delayed_work(sdp->sd_delete_wq, &gl->gl_delete, delay);
+++>>>>>>> 085e423b4d51 (gfs2: Randomize GLF_VERIFY_DELETE work delay)
+  }
+  
+  static void delete_work_func(struct work_struct *work)
+* Unmerged path fs/gfs2/glock.c