KVM: x86: correct async page present tracepoint
authorWanpeng Li <wanpeng.li@hotmail.com>
Tue, 21 Mar 2017 04:18:55 +0000 (21:18 -0700)
committerPaolo Bonzini <pbonzini@redhat.com>
Thu, 23 Mar 2017 18:02:07 +0000 (19:02 +0100)
commit24dccf83a121b8a4ad5c2ad383a8184ef6c266ee
tree521c29f36bc8acf9887a043b2c77c3086f5bbe04
parentfb6c8198431311027c3434d4e94ab8bc040f7aea
KVM: x86: correct async page present tracepoint

After async pf setup successfully, there is a broadcast wakeup w/ special
token 0xffffffff which tells vCPU that it should wake up all processes
waiting for APFs though there is no real process waiting at the moment.

The async page present tracepoint print prematurely and fails to catch the
special token setup. This patch fixes it by moving the async page present
tracepoint after the special token setup.

Before patch:

qemu-system-x86-8499  [006] ...1  5973.473292: kvm_async_pf_ready: token 0x0 gva 0x0

After patch:

qemu-system-x86-8499  [006] ...1  5973.473292: kvm_async_pf_ready: token 0xffffffff gva 0x0

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/x86.c