Patch "proc: add a schedule point in proc_pid_readdir()" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

proc: add a schedule point in proc_pid_readdir()

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
proc-add-a-schedule-point-in-proc_pid_readdir.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Eric Dumazet <[email protected]>
Date: Tue, 24 Jan 2017 15:18:07 -0800
Subject: proc: add a schedule point in proc_pid_readdir()

From: Eric Dumazet <[email protected]>

[ Upstream commit 3ba4bceef23206349d4130ddf140819b365de7c8 ]

We have seen proc_pid_readdir() invocations holding cpu for more than 50 ms. Add a cond_resched() to be gentle with other tasks.

---
 fs/proc/base.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -3181,6 +3181,8 @@ int proc_pid_readdir(struct file *file,
 	     iter.tgid += 1, iter = next_tgid(ns, iter)) {
 		char name[PROC_NUMBUF];
 		int len;
+
+		cond_resched();
 		if (!has_pid_permissions(ns, iter.task, 2))
 			continue;
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/proc-add-a-schedule-point-in-proc_pid_readdir.patch queue-4.9/tcp-tcp_probe-use-spin_lock_bh.patch queue-4.9/net-fix-ndo_features_check-ndo_fix_features-comment-ordering.patch queue-4.9/ipv6-fix-flow-labels-when-the-traffic-class-is-non-0.patch