On Sun, Mar 17, 2013 at 07:51:00PM +0100, Paolo Bonzini wrote: > Il 17/03/2013 01:04, Aurelien Jarno ha scritto: > > | boot | install build-dep | build lm-sensors | > > ------------------------+------+-------------------+------------------+ > > versatile | 1:09 | 2:27 | 4:09 | > > versatile cache=wb | 1:08 | 2:25 | 3:44 | > > Strange, cache=wb should be the default.
I agree it's strange, maybe there were other effects, but I am sure when I did the tests cache=wb the build time was clearly shorter. > The real problem with SD is that it doesn't have a flush command, hence > it cannot be made safe against power losses. But the solution is to add > support for virtio-mmio in those boards. > > Paolo > > > vexpress | 1:11 | 3:07 | 3:49 | > > vexpress cache=wb | 1:07 | 3:07 | 3:47 | > > Here the results are more consistent with the default being cache=wb. I'll try to do the same tests on another machine to see if the results are still the same. -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net