Hi, > If you are using virtio drivers in the guest (which I presume you are given > the reference to /dev/vda), try using the following -drive syntax: > > -drive file=/dev/mapper/ioband1,if=virtio,boot=on,cache=off > > This will force the use of O_DIRECT. By default, QEMU does not open with > O_DIRECT so you'll see page cache effects.
Thank you for your suggestion. I was using virtio drives as you wrote. I just thought that kvm would use O_DIRECT option when applications on the guest opened files with O_DIRECT option. I'll try the way you mentioned and report back. Thanks, Ryo Tsuruta ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
