linux-kernel - Re: [PATCH v2] cgroup: disable irqs while holding css_set

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Message-ID: <6c904665-b6ed-5d6a-e486-8c24e47a5695@redhat.com>
Date:	Wed, 22 Jun 2016 17:00:01 -0300
From:	Daniel Bristot de Oliveira <daolivei@...hat.com>
To:	Daniel Bristot de Oliveira <daolivei@...hat.com>,
	Tejun Heo <tj@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Rik van Riel <riel@...hat.com>,
	"Luis Claudio R. Goncalves" <lgoncalv@...hat.com>,
	Li Zefan <lizefan@...wei.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Juri Lelli <juri.lelli@....com>, cgroups@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH v2] cgroup: disable irqs while holding css_set_lock


Hi

On 06/17/2016 04:59 PM, Daniel Bristot de Oliveira wrote:
> - using _irq and _irqsave appropriately, and
> - using raw_spin locks functions.

After some patches/tests on -rt, I figured that there is a -rt specific
patch that moves cgroup_free() calls to the non-atomic context (in the
-rt kernel). So we do not need to convert spinlocks to raw_spinlocks.

I am sending the v3 just to use _irq and _irqsave appropriately.

-- Daniel