linux-kernel - Re: [PATCH v2] writeback: avoid race when update bandwidth

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: <20120615000633.GB25389@dastard>
Date:	Fri, 15 Jun 2012 10:06:33 +1000
From:	Dave Chinner <david@...morbit.com>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	Wanpeng Li <liwp.linux@...il.com>, linux-kernel@...r.kernel.org,
	Gavin Shan <shangw@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2] writeback: avoid race when update bandwidth

On Thu, Jun 14, 2012 at 10:00:06PM +0800, Fengguang Wu wrote:
> On Thu, Jun 14, 2012 at 12:05:59PM +1000, Dave Chinner wrote:
> > On Wed, Jun 13, 2012 at 08:14:34PM +0800, Fengguang Wu wrote:
> I wonder if anyone has a simple script for sorting lock_stat output
> based on that (and perhaps other selectable) criterion? It should be
> possible to write on myself, but still.. ;-)
> 
> Default lock_stat output is sorted by absolute number of contentions.

No that I know of. The default is pretty sane, because a highly
contended lock that is causing performance problems will always show
up near the top. If it's not in the top 10, then it's usually not
worth worrying about until you've dealt with the those above it....

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
--
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/