From: Paolo Bonzini <pbonzini@redhat.com>
To: Arthur Chunqi Li <yzt356@gmail.com>
Cc: kvm <kvm@vger.kernel.org>, Jan Kiszka <jan.kiszka@web.de>
Subject: Re: Calling to kvm_mmu_load
Date: Thu, 31 Oct 2013 10:52:26 +0100 [thread overview]
Message-ID: <5272285A.70907@redhat.com> (raw)
In-Reply-To: <CABpY8MKeYXrTg_jYVKThakvVRt327WiELK0L3pTGudGtD=1ZSw@mail.gmail.com>
Il 31/10/2013 09:05, Arthur Chunqi Li ha scritto:
>> >
>> > Basically everything that accesses the dirty_bitmap field of struct
>> > kvm_memory_slot is involved. It all starts when the
>> > KVM_SET_USER_MEMORY_REGION ioctl is called with the
>> > KVM_MEM_LOG_DIRTY_PAGES flag set.
> I find the mechanism here is set all pages read-only to track all the
> dirty pages. But EPT provides such a dirty bit in EPT paging
> structures. Why don't we use this?
It doesn't provide it on all processors. Check eptad in
/sys/module/kvm_intel/parameters.
Paolo
prev parent reply other threads:[~2013-10-31 9:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-21 7:56 Calling to kvm_mmu_load Arthur Chunqi Li
2013-10-23 6:21 ` Paolo Bonzini
2013-10-24 7:55 ` Arthur Chunqi Li
2013-10-25 0:43 ` Paolo Bonzini
2013-10-29 5:39 ` Arthur Chunqi Li
2013-10-29 12:55 ` Paolo Bonzini
2013-10-30 11:39 ` Arthur Chunqi Li
2013-10-30 11:44 ` Paolo Bonzini
2013-10-31 8:05 ` Arthur Chunqi Li
2013-10-31 9:52 ` Paolo Bonzini [this message]
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