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

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Message-ID: <20130708083914.GB3948@gmail.com>
Date:	Mon, 8 Jul 2013 10:39:14 +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:

> >> 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.

Thanks,

	Ingo
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