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From: Frederic Weisbecker <fweisbec@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>,
	mingo@elte.hu, linux-kernel@vger.kernel.org, h.mitake@gmail.com,
	Paul Mackerras <paulus@samba.org>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	Jens Axboe <jens.axboe@oracle.com>,
	Jason Baron <jbaron@redhat.com>,
	Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Subject: Re: [PATCH] perf lock: Fix state machine to recognize lock sequence
Date: Wed, 21 Apr 2010 18:10:18 +0200	[thread overview]
Message-ID: <20100421161015.GA5650@nowhere> (raw)
In-Reply-To: <1271840158.1776.63.camel@laptop>

On Wed, Apr 21, 2010 at 10:55:58AM +0200, Peter Zijlstra wrote:
> On Wed, 2010-04-21 at 03:26 +0200, Frederic Weisbecker wrote:
> > The max lockdep depth may
> > change in the future, or become variable, so we can't relay on that.
> > 
> Change, possible, variable unlikely, you need a memory allocation to
> extend it, and memory allocation takes locks, which is not a nice thing
> to do in the middle of lockdep.


Sure, I didn't meant on runtime but on boot, like in John's recent
proposal.

Thanks.


  parent reply	other threads:[~2010-04-21 16:10 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-04-10 10:44 Question about lock sequence Hitoshi Mitake
2010-04-10 13:07 ` Frederic Weisbecker
2010-04-10 15:12   ` Hitoshi Mitake
2010-04-16  8:44     ` [PATCH] perf lock: Fix state machine to recognize " Hitoshi Mitake
2010-04-21  1:26       ` Frederic Weisbecker
2010-04-21  8:55         ` Peter Zijlstra
2010-04-21 12:29           ` Hitoshi Mitake
2010-04-21 16:10           ` Frederic Weisbecker [this message]
2010-04-21  9:12         ` Hitoshi Mitake
2010-04-21 16:14           ` Frederic Weisbecker
2010-04-21 12:23         ` [PATCH v2] " Hitoshi Mitake
2010-04-22 22:54           ` Frederic Weisbecker
2010-04-27 12:55           ` [tip:perf/core] " tip-bot for Hitoshi Mitake
2010-04-10 14:01 ` Question about " Peter Zijlstra

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