From: Avi Kivity <avi@redhat.com>
To: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
KVM list <kvm@vger.kernel.org>
Subject: Re: [PATCH 5/6] KVM: MMU: prefetch ptes when intercepted guest #PF
Date: Thu, 17 Jun 2010 12:20:41 +0300 [thread overview]
Message-ID: <4C19E8E9.4060602@redhat.com> (raw)
In-Reply-To: <4C19E532.4070708@cn.fujitsu.com>
On 06/17/2010 12:04 PM, Xiao Guangrong wrote:
>
>
>> So we can change the fault path to always fault 16 ptes, aligned on 16
>> pte boundary, with the needed pte called with specualtive=false.
>>
> Avi, i not understand it clearly, Could you please explain it? :-(
>
Right now if the fault is in spte i, you prefetch ptes
(i+1)..(i+MAX_PREFETCH-1). I'd like to prefetch ptes (i &
~(MAX_PREFETCH-1))..(i | (MAX_PREFETCH - 1)). Read all those gptes, and
map them one by one with speculative = false only for spte i.
Perhaps we need to integrate it into walk_addr, there's no reason to
read the gptes twice.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-06-17 9:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4C16E6ED.7020009@cn.fujitsu.com>
2010-06-15 2:46 ` [PATCH 1/6] KVM: MMU: fix gfn got in kvm_mmu_page_get_gfn() Xiao Guangrong
[not found] ` <4C16E75F.6020003@cn.fujitsu.com>
2010-06-15 2:46 ` [PATCH 2/6] KVM: MMU: fix conflict access permissions in direct sp Xiao Guangrong
[not found] ` <4C16E7AD.1060101@cn.fujitsu.com>
2010-06-15 2:46 ` [PATCH 3/6] KVM: MMU: introduce gfn_to_page_atomic() and gfn_to_pfn_atomic() Xiao Guangrong
2010-06-15 11:22 ` Avi Kivity
2010-06-16 7:59 ` Andi Kleen
2010-06-16 8:05 ` Avi Kivity
2010-06-16 8:49 ` Andi Kleen
2010-06-16 9:40 ` Avi Kivity
2010-06-16 10:51 ` huang ying
2010-06-16 11:08 ` Avi Kivity
2010-06-17 6:46 ` Xiao Guangrong
[not found] ` <4C16E7F4.5060801@cn.fujitsu.com>
2010-06-15 2:46 ` [PATCH 4/6] KVM: MMU: introduce mmu_topup_memory_cache_atomic() Xiao Guangrong
[not found] ` <4C16E82E.5010306@cn.fujitsu.com>
2010-06-15 2:47 ` [PATCH 5/6] KVM: MMU: prefetch ptes when intercepted guest #PF Xiao Guangrong
2010-06-15 11:41 ` Avi Kivity
2010-06-17 7:25 ` Xiao Guangrong
2010-06-17 8:07 ` Avi Kivity
2010-06-17 9:04 ` Xiao Guangrong
2010-06-17 9:20 ` Avi Kivity [this message]
2010-06-17 9:29 ` Xiao Guangrong
2010-06-16 3:55 ` Marcelo Tosatti
[not found] ` <4C16E867.8040606@cn.fujitsu.com>
2010-06-15 2:47 ` [PATCH 6/6] KVM: MMU: trace pte prefetch Xiao Guangrong
2010-06-15 12:09 ` Avi Kivity
2010-06-17 7:27 ` Xiao Guangrong
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