Re: [PATCH] Ignore SRAO MCE if another MCE is being processed

Marcelo Tosatti
2010-04-28T16:28:58Z

On Tue, Apr 27, 2010 at 03:10:49PM +0800, Huang Ying wrote:
> In common cases, guest SRAO MCE will cause corresponding poisoned page
> be un-mapped in host and SIGBUS be sent to QEMU-KVM, then QEMU-KVM
> will relay the MCE to guest OS.
>
> But it is possible that the poisoned page is accessed in guest after
> un-mapped in host and before MCE is relayed to guest OS. So that, the
> SRAR SIGBUS is sent to QEMU-KVM before the SRAO SIGBUS, and if
> QEMU-KVM relays them to guest OS one by one, guest system may reset,
> because the SRAO MCE may be triggered while the SRAR MCE is being
> processed. In fact, the SRAO MCE can be ignored in this situation, so
> that the guest system is given opportunity to survive.
>
> Signed-off-by: Huang Ying <ying.huang@intel.com>

Applied, thanks.