[lkml]   [2011]   [Jul]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 11/11] KVM: MMU: improve write flooding detected
    On 07/27/2011 01:20 PM, Xiao Guangrong wrote:
    > >> }
    > >
    > > I think this is a little dangerous. A guest kernel may be instantiating multiple gptes on a page fault, but guest userspace hits only one of them (the one which caused the page fault) - I think Windows does this, but I'm not sure.
    > >
    > I think this case is not bad: if the guest kernel need to write multiple gptes (>=3),
    > it will cause many page fault, we do better zap the shadow page and let it become writable as
    > soon as possible.
    > (And, we have pte-fetch, it can quickly establish the mapping for a new shadow page)

    Actually, what should save us is unsync pages. Why are we hitting this
    path at all?

    error compiling committee.c: too many arguments to function

     \ /
      Last update: 2011-07-27 13:11    [W:2.325 / U:0.072 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site