4.4-stable review patch. If anyone has any objections, please let me know.
------------------ 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. [[email protected]: coding style fix] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- fs/proc/base.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -3058,6 +3058,8 @@ 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;
