linux-kernel - Re: [PATCH] sched: set TAINT_UNSAFE

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Message-ID: <1336650398.27020.91.camel@laptop>
Date:	Thu, 10 May 2012 13:46:38 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Cc:	Ingo Molnar <mingo@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] sched: set TAINT_UNSAFE_SMP after sleep-in-atomic bug

On Thu, 2012-05-10 at 14:56 +0400, Konstantin Khlebnikov wrote:
> Peter Zijlstra wrote:
> > On Thu, 2012-05-10 at 11:54 +0400, Konstantin Khlebnikov wrote:
> >> Usually sleep-in-atomic bugs are followed by dozens other warnings.
> >> This patch should help to figure out original source of problem.
> >> This taint flag also turns off lockdep, because it can go mad after that.
> >
> > There's already TAINT_WARN any output with that set should be ignored.
> 
> Where? I do not see here anything which might set TAINT_WARN.
> 
> Or you suggest to use TAINT_WARN instead of TAINT_UNSAFE_SMP?

Gargh, yeah it doesn't use WARN and related infrastructure to print that
msg so it missed out on the whole TAINT_WARN stuff.

Yeah, make it set TAINT_WARN or possibly convert the thing to use WARN.

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