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xen-devel
Re: [Xen-devel] poor domU VBD performance.
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To: |
"Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>, "Jens Axboe" <axboe@xxxxxxx>, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] poor domU VBD performance. |
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From: |
Andrew Theurer <habanero@xxxxxxxxxx> |
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Date: |
Thu, 31 Mar 2005 14:49:20 -0600 |
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Cc: |
Xen development list <xen-devel@xxxxxxxxxxxxxxxxxxx>, Vincent Hanquez <tab@xxxxxxxxx>, Philip R Auld <pauld@xxxxxxxxxxx>, Kurt Garloff <garloff@xxxxxxx>, Christian Limpach <Christian.Limpach@xxxxxxxxxxxx> |
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Thu, 31 Mar 2005 20:49:25 +0000 |
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On Thursday 31 March 2005 11:55, Ian Pratt wrote:
> > > I've checked in something along the lines of what you
> >
> > described into
> >
> > > both the 2.0-testing and the unstable trees. Looks to have
> >
> > identical
> >
> > > performance to the original simple patch, at least for a bulk 'dd'.
> >
> > Can you post the patch here for review? Or just point me
> > somewhere I can view it.
>
> Jens,
>
> Thanks for your help on this.
BTW, I am now getting this with xen-unstable:
Process xenblkd (pid: 730, threadinfo=f7cc4000 task=f7c42510)
Stack: c022d172 f44b1a08 f363c6f0 f7cc4000 c046d40c c02849f8 f44b1a08 00000010
00000000 f7c42510 c0115b0a 00000000 00000000 f7c42510 c17f1e48 c01092e6
00000000 f7c42510 c0115b0a 00100100 00200200 00000000 00000000 00000000
Call Trace:
[<c022d172>] blk_run_queue+0x38/0x91
[<c02849f8>] blkio_schedule+0x126/0x149
[<c0115b0a>] default_wake_function+0x0/0x12
[<c01092e6>] ret_from_fork+0x6/0x1c
[<c0115b0a>] default_wake_function+0x0/0x12
[<c02848d2>] blkio_schedule+0x0/0x149
[<c0107571>] kernel_thread_helper+0x5/0xb
Code: Bad EIP value.
<6>note: xenblkd[730] exited with preempt_count 1
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