linux-kernel - Re: [PATCH v3] lockdep: check that no locks held at freeze time

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Message-ID: <20130220103719.GA7691@gmail.com>
Date:	Wed, 20 Feb 2013 11:37:19 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Mandeep Singh Baines <msb@...omium.org>
Cc:	linux-kernel@...r.kernel.org, Oleg Nesterov <oleg@...hat.com>,
	Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v3] lockdep: check that no locks held at freeze time


* Mandeep Singh Baines <msb@...omium.org> wrote:

> We shouldn't try_to_freeze if locks are held. Verified that
> I get no lockdep warnings after applying this patch and
> "vfork: don't freezer_count() for in-kernel users of CLONE_VFORK".
> 
> Changes since v1:
> * LKML: <20130215111635.GA26955@...il.com> Ingo Molnar
>   * Added a msg string that gets passed in.
> * LKML: <20130215154449.GD30829@...hat.com> Oleg Nesterov
>   * Check PF_NOFREEZE in try_to_freeze().
> Changes since v2:
> * LKML: <20130216170605.GC4910@...hat.com> Oleg Nesterov
>   * Avoid unnecessary PF_NOFREEZE check when !CONFIG_LOCKDEP.
> * Mandeep Singh Baines
>   * Generalize an exit specific printk.
> 
> Signed-off-by: Mandeep Singh Baines <msb@...omium.org>
> CC: Oleg Nesterov <oleg@...hat.com>
> CC: Tejun Heo <tj@...nel.org>
> CC: Andrew Morton <akpm@...ux-foundation.org>
> CC: Rafael J. Wysocki <rjw@...k.pl>
> CC: Ingo Molnar <mingo@...hat.com>

Looks good to me now.

Acked-by: Ingo Molnar <mingo@...nel.org>

Which tree should this go through?

Thanks,

	Ingo
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