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Date: Mon, 23 Jul 2007 14:51:29 +0800 From: Shaohua Li <shaohua.li@...el.com> To: kvm-devel <kvm-devel@...ts.sourceforge.net>, lkml <linux-kernel@...r.kernel.org> Cc: Avi Kivity <avi@...ranet.com>, Ingo Molnar <mingo@...e.hu> Subject: [RFC 0/8]KVM: swap out guest pages This patch series make kvm guest pages be able to be swapped out and dynamically allocated. Without it, all guest memory is allocated at guest start time. patches are against latest git, and you need first patch Avi's kvm-sch integration patch (http://sourceforge.net/mailarchive/forum.php?thread_name=11841693332609-git-send-email-avi%40qumranet.com&forum_name=kvm-devel ). Patch is quite stable in my test. With the patch, I can run a 256M memory guest in a 300M memory host. If guest is idle, the memory it used can be less than 10M. I did a simple performance test (measure kernel build time in guest), if there is few swap, the performance w/wo the patch difference isn't significent. If you have better measurement approach, please let me try. Unresolved issue: 1. swapoff doesn't work, we need a hook. 2. SMP guest might not work, as kvm doesn't support smp till now. 3. better algorithm to select swaped out guest pages according to guest's memory usage. Maybe more. Any suggests and comments are appreciated. Thanks, Shaohua - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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