linux-kernel - Re: BFS 420: fix clear_sticky when breaking sole affinity

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Message-ID: <CAJd=RBBSn7WfYgUPdDY8eTd2cy-R6uR_YKV39z4rLvu0-BkCfQ@mail.gmail.com>
Date:	Wed, 23 May 2012 20:55:37 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>,
	Hillf Danton <dhillf@...il.com>
Subject: Re: BFS 420: fix clear_sticky when breaking sole affinity

The sticky bit is cleared after checking the task with the bit set for
given CPU.

--- a/kernel/sched/bfs.c	Mon May 14 20:50:38 2012
+++ b/kernel/sched/bfs.c	Wed May 23 20:16:18 2012
@@ -5153,7 +5153,8 @@ static void break_sole_affinity(int src_
 				       task_pid_nr(p), p->comm, src_cpu);
 			}
 		}
-		clear_sticky(p);
+		if (task_sticky(p) && task_cpu(p) == src_cpu)
+			clear_sticky(p);
 	} while_each_thread(t, p);
 }

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