linux-kernel - Re: The timer softirq on the RT kernel

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Message-ID: <20160805131741.63473d41@jnakajim-build>
Date:	Fri, 5 Aug 2016 13:17:41 -0700
From:	yunhong jiang <yunhong.jiang@...ux.intel.com>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
	rostedt@...dmis.org
Subject: Re: The timer softirq on the RT kernel

On Fri, 05 Aug 2016 04:36:23 +0200
Mike Galbraith <umgwanakikbuti@...il.com> wrote:

> On Thu, 2016-08-04 at 17:36 -0700, yunhong jiang wrote:
> > Hi,Mike & Steven
> > 	On https://lkml.org/lkml/2015/3/24/1178, the patch of
> > "timers: do not raise softirq unconditionally" is reverted. Thanks
> > for Steven's
> > detailed comments, it's quite clear explained.
> > 	I remember Mike has a patch trying to fix it but late
> > abandoned. Do you still have any plan to work on this? Otherwise, I
> > will have a try.
> 
> Sebastian converted the lock to raw in -rt, so nohz_full now works
> without any extra hackery.

Hi, Mike, thanks for reply and the update. I still noticed timer softirq
on my isolated CPUs, possibly something wrong on my environment. I will
re-check it.

Thanks
--jyh

> 
> 	-Mike