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]
Date:	Mon, 26 Mar 2012 16:00:47 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Vivek Haldar <haldar@...gle.com>
CC:	Andreas Dilger <adilger@...ger.ca>, tytso@....edu,
	linux-ext4@...r.kernel.org, tim.c.chen@...ux.intel.com
Subject: Re: [RFC, PATCH] Avoid hot statistics cache line in ext4 extent cache

On 3/26/2012 3:26 PM, Vivek Haldar wrote:
> Andi --
>
> I realized the problem soon after the original patch, and submitted
> another patch to make these per cpu  counters.

Is there a clear use case having these counters on every production system?

Especially given that they are racy and prone to lost updates today.

And you can still get the information if you really need it by putting a 
systemtap etc. probe.

-Andi

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists