linux-kernel - Re: 2.6.19-rc3: known unfixed regressions (v3)

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Message-ID: <20061031211538.GC6866@mellanox.co.il>
Date:	Tue, 31 Oct 2006 23:15:38 +0200
From:	"Michael S. Tsirkin" <mst@...lanox.co.il>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	"Jun'ichi Nomura" <j-nomura@...jp.nec.com>,
	Martin Lorenz <martin@...enz.eu.org>,
	Pavel Machek <pavel@...e.cz>, Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	len.brown@...el.com, linux-acpi@...r.kernel.org, linux-pm@...l.org,
	"Randy.Dunlap" <rdunlap@...otime.net>
Subject: Re: 2.6.19-rc3: known unfixed regressions (v3)

Quoting r. Linus Torvalds <torvalds@...l.org>:
> Subject: Re: 2.6.19-rc3: known unfixed regressions (v3)
> 
> 
> 
> On Mon, 30 Oct 2006, Jun'ichi Nomura wrote:
> > 
> > Please revert the patch. I'll fix the wrong error handling.
> > 
> > I'm not sure reverting the patch solves the ACPI problem
> > because Michael's kernel seems not having any user of
> > bd_claim_by_kobject.
> 
> Yeah, doing a grep does seem to imply that there is no way that those 
> changes could matter.
> 
> Michael, can you double-check? I think Jun'ichi is right - in your kernel, 
> according to the config posted on bugzilla, I don't think there should be 
> a single caller of bd_claim_by_disk, since CONFIG_MD is disabled.

I double-checked, and of course you are right - the issues resurfaced after some
more use, even with the patch reverted.  I've written some scripts that do some
compiles from scratch, and suspend/resume several times.  Plan to try bi-secting
with that and see what that will come up with.

OTOH, from the discussion it seems just randomly pointing a finger at a patch
has uncovered some bugs - so maybe we should do this a bit more :)


-- 
MST
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