linux-kernel - Re: [PATCH v2.6.36-rc7] infiniband: update workqueue usage

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: <1287508926.27343.299.camel@chromite.mv.qlogic.com>
Date:	Tue, 19 Oct 2010 10:22:06 -0700
From:	Ralph Campbell <ralph.campbell@...gic.com>
To:	Tejun Heo <tj@...nel.org>
CC:	Roland Dreier <rolandd@...co.com>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2.6.36-rc7] infiniband: update workqueue usage

On Tue, 2010-10-19 at 08:24 -0700, Tejun Heo wrote:

> * qib_cq_wq is a separate singlethread workqueue.  Does the queue
>   require strict single thread execution ordering?  IOW, does each
>   work have to be executed in the exact queued order and no two works
>   should execute in parallel?  Or was the singlethreadedness chosen
>   just to reduce the number of workers?

The work functions need to be called in-order and single threaded
or memory will be freed multiple times and other "bad things".

--
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/