From: Izik Eidus <ieidus@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: avi@redhat.com, kvm@vger.kernel.org, aarcange@redhat.com
Subject: Re: [PATCH 2/3] add SPTE_HOST_WRITEABLE flag to the shadow ptes
Date: Mon, 14 Sep 2009 19:51:16 +0300 [thread overview]
Message-ID: <4AAE7484.8040806@redhat.com> (raw)
In-Reply-To: <20090914083417.GA3250@amt.cnet>
Marcelo Tosatti wrote:
> Why can't you use the writable bit in the spte? So that you can only
> sync a writeable spte if it was writeable before, in sync_page?
>
I could, but there we will add overhead for read only gptes that become
writable in the guest...
If you prefer to fault on the syncing of the guest gpte readonly to gpte
writeable I can change it...
What you prefer?
> Is there any other need for the extra bit?
>
No
next prev parent reply other threads:[~2009-09-14 16:42 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-10 16:38 [PATCH 0/3] ksm support for kvm Izik Eidus
2009-09-10 16:38 ` [PATCH 1/3] kvm: dont hold pagecount reference for mapped sptes pages Izik Eidus
2009-09-10 16:38 ` [PATCH 2/3] add SPTE_HOST_WRITEABLE flag to the shadow ptes Izik Eidus
2009-09-10 16:38 ` [PATCH 3/3] add support for change_pte mmu notifiers Izik Eidus
2009-09-11 21:24 ` Marcelo Tosatti
2009-09-12 6:41 ` Izik Eidus
2009-09-12 16:18 ` Marcelo Tosatti
2009-09-12 17:04 ` Izik Eidus
2009-09-12 16:59 ` Marcelo Tosatti
2009-09-11 21:14 ` [PATCH 2/3] add SPTE_HOST_WRITEABLE flag to the shadow ptes Marcelo Tosatti
2009-09-12 6:35 ` Izik Eidus
2009-09-14 5:18 ` Avi Kivity
2009-09-14 8:34 ` Marcelo Tosatti
2009-09-14 16:51 ` Izik Eidus [this message]
2009-09-23 18:25 [PATCH 0/3] ksm support for kvm v2 Izik Eidus
2009-09-23 18:25 ` [PATCH 1/3] kvm: dont hold pagecount reference for mapped sptes pages Izik Eidus
2009-09-23 18:25 ` [PATCH 2/3] add SPTE_HOST_WRITEABLE flag to the shadow ptes Izik Eidus
2009-09-23 18:47 [PATCH 0/3] kvm ksm support v3 Izik Eidus
2009-09-23 18:47 ` [PATCH 1/3] kvm: dont hold pagecount reference for mapped sptes pages Izik Eidus
2009-09-23 18:47 ` [PATCH 2/3] add SPTE_HOST_WRITEABLE flag to the shadow ptes Izik Eidus
2009-09-24 16:55 ` Andrea Arcangeli
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