linux-kernel - Re: [Patch v5 0/9] liblockdep: userspace lockdep

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Message-ID: <20130912180120.GB32511@gmail.com>
Date:	Thu, 12 Sep 2013 20:01:20 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [Patch v5 0/9] liblockdep: userspace lockdep


* Sasha Levin <sasha.levin@...cle.com> wrote:

> On 07/08/2013 04:39 AM, Ingo Molnar wrote:
> >
> >* Sasha Levin <sasha.levin@...cle.com> wrote:
> >
> >>>>The other issue is that with lock classes disabled you have to hit an
> >>>>actual deadlock to trigger any output.
> >>>>
> >>>>I.e. much of the power of lockdep is diminished :-/ When actual
> >>>>deadlocks are triggered then it's not particularly complex to debug
> >>>>user-space apps: gdb the hung task(s) and look at the backtraces.
> >>>
> >>>Lock classes are disabled only if you're using the LD_PRELOAD method
> >>>of testing. If you actually re-compile your code with the library (by
> >>>just including the header and setting a #define to enable it) you will
> >>>have lock classes.
> >>
> >>Hi Ingo,
> >>
> >>Just wondering if you're planning on pushing it over to Linus from your
> >>tree, or should I go ahead and do it on my own?
> >
> >PeterZ is in favor as well so I'll apply them after the merge window, for
> >v3.12.
> 
> Hi Ingo,
> 
> Do you intend to send liblockdep in this merge window as planned?

If Peter agrees with them and picks them up then the next merge window 
would be fine I guess.

Thanks,

	Ingo
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