RE: [PATCH] sched/rt: don't enable runtime if already enabled

2012-12-28 Thread Neil Zhang
Mike, > -Original Message- > From: Mike Galbraith [mailto:bitbuc...@online.de] > Sent: 2012年12月12日 17:39 > To: Neil Zhang > Cc: pet...@infradead.org; mi...@kernel.org; Chao Xie; > linux-kernel@vger.kernel.org > Subject: RE: [PATCH] sched/rt: don't enable runtime

RE: [PATCH] sched/rt: don't enable runtime if already enabled

2012-12-12 Thread Mike Galbraith
essage- > From: Neil Zhang > Sent: 2012年12月4日 17:31 > To: Neil Zhang; pet...@infradead.org; mi...@kernel.org > Cc: Chao Xie; linux-kernel@vger.kernel.org > Subject: RE: [PATCH] sched/rt: don't enable runtime if already enabled > > Hi All, > > -Original Messag

RE: [PATCH] sched/rt: don't enable runtime if already enabled

2012-12-11 Thread Neil Zhang
Ingo and All, -Original Message- From: Neil Zhang Sent: 2012年12月4日 17:31 To: Neil Zhang; pet...@infradead.org; mi...@kernel.org Cc: Chao Xie; linux-kernel@vger.kernel.org Subject: RE: [PATCH] sched/rt: don't enable runtime if already enabled Hi All, -Original Message-

RE: [PATCH] sched/rt: don't enable runtime if already enabled

2012-12-04 Thread Neil Zhang
Hi All, -Original Message- From: Neil Zhang [mailto:zhan...@marvell.com] Sent: 2012年12月3日 16:01 To: mi...@redhat.com; pet...@infradead.org Cc: Chao Xie; linux-kernel@vger.kernel.org; Neil Zhang Subject: [PATCH] sched/rt: don't enable runtime if already enabled There are two paths

[PATCH] sched/rt: don't enable runtime if already enabled

2012-12-03 Thread Neil Zhang
There are two paths will call __enable_runtime, they are enable_runtime and rq_online. Don't enable runtime again if it is already enabled. It can fix the following kernel BUG when do cpu hotplug while there are realtime threads running. [ 3347.091644] kernel BUG at kernel/sched/rt.c:687! [ 3347.0