On Fri, Oct 30, 2009 at 10:00:28AM +0000, Richard W.M. Jones wrote: > On Tue, Oct 27, 2009 at 10:12:49AM +0000, Mark McLoughlin wrote: > > ksm is disabled by default currently > [...] > > # unless KSM_MAX_KERNEL_PAGES is set, let ksm munch up to half of total > > memory. > > Mark, can you summarise why we wouldn't want KSM to be enabled by > default, and why we need to limit it to half of total memory? > The limit to half of total memory is because ksm pages are unswappable at this time. To be fixed in a future kernel. As for enabling by default, the more I think about it, the more this makes sense. The ksm initscript is shipped with qemu, so anyone with it installed should be interested in virt, and the value of max_kernel_pages doesn't matter if you are not running anything which marks memory mergeable, which only kvm does at the moment.
Justin _______________________________________________ Fedora-virt mailing list [email protected] https://www.redhat.com/mailman/listinfo/fedora-virt
