linux-kernel - Re: [PATCH] perf lock: Fix state machine to recognize lock sequence

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20100421161015.GA5650@nowhere>
Date:	Wed, 21 Apr 2010 18:10:18 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>, mingo@...e.hu,
	linux-kernel@...r.kernel.org, h.mitake@...il.com,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Jason Baron <jbaron@...hat.com>,
	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Subject: Re: [PATCH] perf lock: Fix state machine to recognize lock sequence

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.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/