Messages in this thread | | | Date | Tue, 17 Apr 2012 15:41:39 +0300 | From | Avi Kivity <> | Subject | Re: [PATCH 00/13] KVM: MMU: fast page fault |
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On 04/17/2012 03:37 PM, Takuya Yoshikawa wrote: > On Tue, 17 Apr 2012 10:51:40 +0300 > Avi Kivity <avi@redhat.com> wrote: > > > That's true with the write protect everything approach we use now. But > > it's not true with range-based write protection, where you issue > > GET_DIRTY_LOG on a range of pages and only need to re-write-protect them. > > > > (the motivation for that is to decrease the time between GET_DIRTY_LOG > > and sending the page; as the time increases, the chances that the page > > got re-dirtied go up). > > Thank you for explaining this. > > I was planning to give the userspace more freedom. > > Since there are many known algorithms to predict hot memory pages, > the userspace will be able to tune the frequency of GET_DIRTY_LOG for such > parts not to get too many faults repeatedly, if we can restrict the range > of pages to protect. > > This is the fine-grained control.
Do you want per-page control, or just range-based?
-- error compiling committee.c: too many arguments to function
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