linux-kernel - Re: [RFC][PATCH] CPUSets: Move most calls to rebuild_sched

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:	Thu, 26 Jun 2008 21:19:05 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Max Krasnyansky <maxk@...lcomm.com>
Cc:	Paul Menage <menage@...gle.com>,
	Vegard Nossum <vegard.nossum@...il.com>,
	Paul Jackson <pj@....com>, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org, Gautham R Shenoy <ego@...ibm.com>
Subject: Re: [RFC][PATCH] CPUSets: Move most calls to
	rebuild_sched_domains() to the workqueue

On Thu, 2008-06-26 at 11:49 -0700, Max Krasnyansky wrote:

> > Does that mean that you can't ever call get_online_cpus() from a
> > workqueue thread?
> 
> In general it should be ok (no different from user-space task calling 
> it). But there is still circular dependency because we're calling into
> domain partitioning code.
> Below is more detailed lockdep report with your patch applied on top of 
> -rc8.
> Looks like this might be a good time to rethink overall locking in there.

Gautham has been working on some of this recently. Perhaps he can share
his patch-stack again.



--
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/