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Message-ID: <20150402173404.GV9974@htj.duckdns.org>
Date: Thu, 2 Apr 2015 13:34:04 -0400
From: Tejun Heo <tj@...nel.org>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Sasha Levin <sasha.levin@...cle.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
maninder1.s@...sung.com, tglx@...utronix.de,
Yogesh Narayan Gaur <yn.gaur@...sung.com>,
AJEET YADAV <ajeet.y@...sung.com>
Subject: Re: restart_syscall: use freezable blocking call
On Thu, Apr 02, 2015 at 07:25:13PM +0200, Peter Zijlstra wrote:
> On Thu, Apr 02, 2015 at 12:03:08PM -0400, Sasha Levin wrote:
> > It's not correct.
>
> Yay for lockdep ;-)
>
> > [ 0.645644] debug_check_no_locks_held (kernel/locking/lockdep.c:4178)
>
> Should we also have that call in freezer_do_not_count() ?
I think conerting a general scheduling function like
schedule_hrtimeout to do freezable sleeps blindly is a pretty bad
idea. This must be determined per specific sleep site.
Thanks.
--
tejun
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