On Mon, Apr 07, 2008 at 02:24:41PM -0700, Bond Masuda wrote:
> I am aware of the change regarding barrier/nobarrier in 2.6.17 and above.
> However, the performance hit I'm seeing is very severe and much worse than
> what I was seeing in 2.6.17 (bundled with latest updates in Fedora Core 4).
> I'm currently running Fedora 8 with 18.104.22.168-64.fc8. If I remove nobarrier
> mount option, it takes seconds just to write few megabytes and the system
> becomes very very sluggish. On 2.6.17 (Fedora 4) without the nobarrier
> option it was still usable.
Doesn't sound like a barrier problem.
> The XFS file system is about 900GB, if that matters.
> Is this a known problem?
> How can I gather more information to figure out
> exactly what is going on?
Start with what your hardware is, what your storage config is, output
of 'xfs_info <mtpt>', the log of your test (complete output) on working
and non-working kernels, etc.
SGI Australian Software Group