Messages in this thread Patch in this message | | | Subject | [RFC PATCH QEMU] i386/kvm: Enable paravirtual unused page hint mechanism | From | Alexander Duyck <> | Date | Mon, 04 Feb 2019 10:19:49 -0800 |
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From: Alexander Duyck <alexander.h.duyck@linux.intel.com>
This patch adds the flag named kvm-pv-unused-page-hint. This functionality is enabled by kvm for x86 and provides a mechanism by which the guest can indicate to the host which pages it is no longer using. By providing these hints the guest can help to reduce the memory pressure on the host as dirtied pages will be cleared and not written out to swap if they are marked as being unused.
Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com> --- target/i386/cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 2f5412592d30..0d19a9dc64f1 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -900,7 +900,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { "kvmclock", "kvm-nopiodelay", "kvm-mmu", "kvmclock", "kvm-asyncpf", "kvm-steal-time", "kvm-pv-eoi", "kvm-pv-unhalt", NULL, "kvm-pv-tlb-flush", NULL, "kvm-pv-ipi", - NULL, NULL, NULL, NULL, + "kvm-pv-unused-page-hint", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "kvmclock-stable-bit", NULL, NULL, NULL,
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