Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests

[Peter Lieven]

Am 18.09.2014 um 16:17 schrieb Paolo Bonzini <address@hidden>:

> Il 18/09/2014 16:16, 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.
>> 
>> thats what I did...
> 
> Ah, I saw of=test.

It was definitely /dev/vda. Any ideas? Maybe something in the virtio drivers?

Peter