linux-kernel - Re: 3.7-rc8 boot failure due to recent workqueue-related patch

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Message-ID: <alpine.LFD.2.02.1212081647500.4593@air.linux-foundation.org>
Date:	Sat, 8 Dec 2012 16:50:21 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Mel Gorman <mgorman@...e.de>
cc:	Tejun Heo <tj@...nel.org>, Xiaotian Feng <dannyfeng@...cent.com>,
	Neela Syam Kolli <megaraidlinux@....com>,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 3.7-rc8 boot failure due to recent workqueue-related patch



On Sat, 8 Dec 2012, Mel Gorman wrote:
>
> Commit 8852aac2 (workqueue: mod_delayed_work_on() shouldn't queue timer on
> 0 delay) is causing the following boot failure for me. Found by bisection
> but no further analysis unfortunately until I get back home properly.
> I've added the relevant maintainers for megasas and SCSI in case it's
> somehow specific to that driver.

This should be fixed by commit c1d390d8e612. The Megaraid SAS driver was 
doing insane things, using a work-struct for delayed work, and casting 
pointers around. It had happened to work for all the wrong reasons before, 
the mod_delayed_work_on() changes just exposed how crazy that crap was.

So please test current -git. If it's still broken, we'll need to know, but 
I'm assuming this is the already-known-and-fixed bug.

             Linus
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