Messages in this thread Patch in this message | | | From | Wanpeng Li <> | Subject | [PATCH] x86/kvm: Don't waste memory if kvmclock is disabled | Date | Tue, 22 Feb 2022 01:02:03 -0800 |
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From: Wanpeng Li <wanpengli@tencent.com>
Even if "no-kvmclock" is passed in cmdline parameter, the guest kernel still allocates hvclock_mem which is scaled by the number of vCPUs, let's check kvmclock enable in advance to avoid this memory waste.
Signed-off-by: Wanpeng Li <wanpengli@tencent.com> --- arch/x86/kernel/kvmclock.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index a35cbf9107af..44ed677d401f 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -239,6 +239,9 @@ static void __init kvmclock_init_mem(void) static int __init kvm_setup_vsyscall_timeinfo(void) { + if (!kvmclock) + return 0; + kvmclock_init_mem(); #ifdef CONFIG_X86_64 -- 2.25.1
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