[Xen-devel] Degregated I/O Performance since 3.4 - Regression in 3.4?

[Tobias Geiger <tobias.geiger@xxxxxxxxx>]

Hello!

i noticed a considerable drop in I/O Performance when using 3.4 (rc3 and rc4 
tested) as Dom0 Kernel;

With 3.3 i get over 100mb/s in a HVM DomU (win64) with PV Drivers 
(gplpv_Vista2008x64_0.11.0.357.msi); 
With 3.4 it drops to about a third of that.

Xen Version is xen-unstable: 
xen_changeset          : Tue Apr 17 19:13:52 2012 +0100 25209:e6b20ec1824c

Disk config line is:
disk = [ '/dev/vg_ssd/win7system,,hda' ] 
- it uses blkback.

Greetings
Tobias

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