Is it true (it seems so...) that the linux dom0 pv block backend driver is bypassing the buffer / page cache of dom0 [*]? And the solaris dom0 block backend driver doesn't?
Are there any technical reasons why linux doesn't cache in dom0? Is it a bug or feature that solaris does cache in dom0? Well, a positive effect of solaris dom0 cacheing seems to be that /boot/solaris/bin/create_ramdisk inside a solaris domU is much faster when running on a solaris dom0 than on a linux dom0. E.g. (8G - 1G) dom0 ubuntu amd64 + 1G solaris amd64 PV domU needs ~40 seconds for create_ramdisk in domU, while (4G - 0.5G) dom0 solaris amd64 + .5G solaris amd64 PV domU needs ~22 seconds for create_ramdisk in domU. [*] http://lists.xensource.com/archives/html/xen-devel/2005-05/msg01167.html This message posted from opensolaris.org _______________________________________________ xen-discuss mailing list [email protected]
