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Re: Suggestions for kernel/XFS version?

To: Theo Van Dinter <felicity@xxxxxxxxx>
Subject: Re: Suggestions for kernel/XFS version?
From: Steve Lord <lord@xxxxxxx>
Date: 02 Oct 2002 10:58:24 -0500
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <20021002154037.GD1527@xxxxxxxxx>
References: <20021002154037.GD1527@xxxxxxxxx>
Sender: linux-xfs-bounce@xxxxxxxxxxx
Just a simple answer, those 'snapshots' that you see are probably a lot
more stable than 1.1 or 1.0 were. Most of what has gone into xfs since
1.1 has been bug fixes and code cleanup. In general I run the cvs tree,
plus other changes I am working on on my workstation. Unless I messed
up somewhere in those extra changes, I have zero problems. We run
nightly regression tests internally, and it is only rarely that
they show anything up.


On Wed, 2002-10-02 at 10:40, Theo Van Dinter wrote:
> I've been using XFS for a while, but find myself in a bit of a quandry
> about where to go now...
> A week or two ago, my main server got very flaky (semi-constant
> rebooting), so I replaced the Athlon UP MB/CPU for a nice
> Athlon MP version.  It came up fine with the kernel at the time
> (2.4.9-31SGI_XFS_1.1, no data loss or errors), so I upgraded to
> smp-2.4.18-4SGI_XFS_1.1 to get a recent MP-based kernel.
> The server has a 3ware RAID controller, and also uses LVM, so I've been
> paying attention to versions of these drivers.  2.4.18 and previous
> had old versions of the 3ware driver, so I would compile a new version
> whenever I changed kernels.
> This is when I noticed that the UP XFS 2.4.18-4 (could have been
> XFS 2.4.18 instead) kernel had LVM 1.0.3, whereas SMP XFS 2.4.18-4
> has 1.0.1-rc4.  I also found that SMP XFS 2.4.18-4 seemed to hit the
> disk a lot for writes, almost like it had no or only a very small
> kernel-level write cache/XFS pre-allocation space. (write cache is off
> on the controller)
> Since the performance was noticably bad because of this, I switched last
> night to SMP 2.4.18-SGI_XFS_1.1.  This seems to have solved my performance
> problem, but I now I have 2 new problems.  1) I'm left with LVM 1.0.1-rc4,
> and 2) I can't compile a new 3w-xxxx driver (the module compiles, but I get
> "Undefined symbols" when I run the depmod to verify installation).
> So the quandry is: Where should I go from here?  So far,
> 2.4.18-SGI_XFS_1.1 seems to have solved the performance issue I was
> seeing, but has old LVM and 3w-xxxxx drivers which I'd like to upgrade.
> It looks like 2.4.19 has LVM 1.0.3 and the correct 3w-xxxx driver version
> already.  So I could compile up my own kernel, but the only XFS patch I
> see for 2.4.19 is a CVS snapshot from last week.  I'm leary of using a
> snapshot for an integral part of the kernel, but there doesn't seem to
> be a 1.1 patch for 2.4.19 (and the 2.4.18 patch seems to be XFS 1.1-PR2).
> Any thoughts?  Thanks. :)
> -- 
> Randomly Generated Tagline:
> "Now it's time for pay back ... Can someone lend me enough for a Coke?"
>                       - Chris Bentley

Steve Lord                                      voice: +1-651-683-3511
Principal Engineer, Filesystem Software         email: lord@xxxxxxx

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