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Date: Thu, 18 Sep 2014 16:12:10 +0200
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Subject: Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized
	read/write requests
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To: Peter Lieven <pl@kamp.de>
Cc: =?windows-1252?Q?Beno=EEt_Canet?= <benoit.canet@irqsave.net>, Kevin Wolf <kwolf@redhat.com>, ronnie sahlberg <ronniesahlberg@gmail.com>, qemu-devel <qemu-devel@nongnu.org>, Max Reitz <mreitz@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>

Il 12/09/2014 13:43, Peter Lieven ha scritto:
> 
> As you can see from the multiwrite_merge trace the merging has never been stopped because of
> the max_transfer_length. The question is, why are the I/O requests not coming in as specified?

I think that's because of the filesystem.  Try writing directly to a device.

Paolo