linux-kernel - Re: multi-second application stall in open()

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20120621213235.GF4642@google.com>
Date:	Thu, 21 Jun 2012 14:32:35 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Josh Hunt <joshhunt00@...il.com>
Cc:	Vivek Goyal <vgoyal@...hat.com>, Jens Axboe <axboe@...nel.dk>,
	linux-kernel@...r.kernel.org, rni@...gle.com
Subject: Re: multi-second application stall in open()

Hello,

On Thu, Jun 21, 2012 at 04:28:24PM -0500, Josh Hunt wrote:
> When you say the code has diverged from upstream, do you mean from 3.0
> to 3.5?

It's based on something diverged from 2.6.X, so an ancient thing.

> Or maybe I'm misunderstanding what you're getting at. Also, if
> you have any links to the watchdog timer code you're referring to I
> would appreciate it.

Rakesh is the one who observed the bug and wrote the watchdog code.
Rakesh, I think Josh is seeing similar cfqq hang issue.  Did the
watchdog code reveal why that happened?  Or was it mainly to just kick
the queue and keep it going?

Thanks.

-- 
tejun
--
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/