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...ery short values for max_segments and max_segment_size. (I have 250MB/s write speed in Dom0 vs 40MB/s write speed in DomU) From what I read, there is already a patch to fix that, called "multi page ring support for block devices" : http://lists.xen.org/archives/html/xen-devel/2012-03/msg00388.html But it doesn''t seem to have been accepted. So, does it exist an other solution to fix that kind of problem ? Thanks, Olivier

...f course) let''s me think, this could a bug in xen kernel source code. Greetings! Josef [1] http://lists.xensource.com/archives/html/xen-users/2011-01/msg00411.html [2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=610832 [3] http://lists.xensource.com/archives/html/xen-users/2011-01/msg00388.html _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel