linux-kernel - Re: trouble with mounting a 1.5 TB raid6 volume in 2.6.19-rc5-mm1

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Message-ID: <20061113174341.GA3819@amd64.of.nowhere>
Date:	Mon, 13 Nov 2006 18:43:41 +0100
From:	thunder7@...all.nl
To:	Neil Brown <neilb@...e.de>
Cc:	Jurriaan <thunder7@...all.nl>, linux-kernel@...r.kernel.org
Subject: Re: trouble with mounting a 1.5 TB raid6 volume in 2.6.19-rc5-mm1

From: Neil Brown <neilb@...e.de>
Date: Mon, Nov 13, 2006 at 08:43:54PM +1100
> On Monday November 13, neilb@...e.de wrote:
> > 
> > Can you try reverting this patch (patch -p1 -R) ?
> > 
> 
> Yes, I'm confident that reverting that patch will fix your problem.
> I actually found a number of errors while tracking this down :-(

Oops. Do you have some kind of test-suite to run on md-devices before
releasing a patch? I didn't think my hardware was that exotic.

I had a scary moment just now, since 2.6.19-rc5-mm1 without your patch
wanted to fsck the volume, and started repairing errors which didn't
exist on disk. Luckily, it stopped before inode 64, and I was able to
fsck the volume on an earlier kernel without apparent damage.

Still, a test suite seems like a good idea. Also, getting Andrew to
either add this as a hot-fix or release -mm2 would be a good idea,
IMVHO.

> The following patch makes everything happy for me, but I'll be
> revising it and splitting it up before submitting it (Andrew: please
> don't just grab it from here :-)

It works for me. I can mount the partition, read it, create files, all
is OK.

> Thanks again for the report.

No problem - I'm glad to be able to do something back for all your (yes,
that's you, kernel developers) hard work. If this had actually corrupted
my hdtv streams collection, I would have been a trifle less
enthousiastic, of course.

Kind regards,
Jurriaan
-- 
Sir Humphrey: "It is characteristic of all committee discussions and
decisions that every member has a vivid recollection of them and that
every member's recollection of them differs violently from every other
member's recollection."
	Yes Prime Minister
Debian (Unstable) GNU/Linux 2.6.19-rc5-mm1 2x4826 bogomips load 0.48
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