linux-kernel - Re: XFS internal error xfs_da_do_buf(1) at line 2015 of file fs/xfs/xfs_da

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Message-ID: <87aba7jcjj.fsf@basil.nowhere.org>
Date:	Sun, 04 Jan 2009 16:50:24 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Adam Nielsen <a.nielsen@...kadi.net>,
	LKML Mailinglist <linux-kernel@...r.kernel.org>, agk@...hat.com
Subject: Re: XFS internal error xfs_da_do_buf(1) at line 2015 of file fs/xfs/xfs_da_btree.c

Christoph Hellwig <hch@...radead.org> writes:
>
>> Of course certain distributions default to using LVM for all their file
>> systems which is completely and mindbogglingly bogus. That both messes up
>> barriers in some cases and takes a good 10-20% off performance when I've
>> benched it.
>
> The thing is that there's no reason for that at all with just a single
> underlying disk. 

I've submitted patches to do exactly that in DM some time ago. 
Unfortunately they still didn't make it in (as of 2.6.29 git) for unknown reasons.

-Andi
-- 
ak@...ux.intel.com
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