Re: [Xen-devel] poor domU VBD performance.

[Andrew Theurer <habanero@xxxxxxxxxx>]

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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