Re: [Qemu-devel] [PATCH 0/3] block: Handle multiple write requests at once

[Christoph Hellwig]

On Wed, Sep 02, 2009 at 05:50:47PM +0200, Kevin Wolf wrote:
> It's a RHEL 5.3 installation, and the kernel doesn't seem to even
> provide this file. However, I think I read that this is an issue of
> relatively new kernels, so probably not?

Indeed.

> What could matter, though, is that the installer uses LVM for the
> standard layout which I'm using. Does this make a difference in that
> respect?

It should not matter.  Then again it should not issue these I/O patterns
at all, but it does.  Something is clearly wrong in those I/O patterns,
but given that the exist out there in the field it seems like we'll have
to deal with it.  I'll look over the patch a bit more carefully to see
if there is any obviously better way to handle it.