On 2019/5/13 17:44, Peter Maydell wrote: > On Mon, 13 May 2019 at 07:32, Dongjiu Geng <gengdongjiu@xxxxxxxxxx> wrote: >> >> When user space do memory recovery, it will check whether KVM and >> guest support the error recovery, only when both of them support, >> user space will do the error recovery. This patch exports this >> capability of KVM to user space. >> >> Cc: Peter Maydell <peter.maydell@xxxxxxxxxx> >> Signed-off-by: Dongjiu Geng <gengdongjiu@xxxxxxxxxx> >> --- >> v1->v2: >> 1. check whether host support memory failure instead of RAS capability >> https://patchwork.kernel.org/patch/10730827/ >> >> v1: >> 1. User space needs to check this capability of host is suggested by Peter[1], >> this patch as RFC tag because user space patches are still under review, >> so this kernel patch is firstly sent out for review. >> >> [1]: https://patchwork.codeaurora.org/patch/652261/ >> --- > > I thought the conclusion of the thread on the v1 patch was that > userspace doesn't need to specifically ask the host kernel if > it has support for this -- if it does not, then the host kernel > will just never deliver userspace any SIGBUS with MCEERR code, > which is fine. Or am I still confused? thanks Peter's quick reply. yes, I think so, if it does not support, then the host kernel will just never deliver userspace any SIGBUS with MCEERR code. so maybe we do not need this patch. > > thanks > -- PMM > . >
