From: Avi Kivity <avi@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Xiao Guangrong <xiaoguangrong.eric@gmail.com>,
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>,
LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
Subject: Re: [PATCH 00/13] KVM: MMU: fast page fault
Date: Tue, 10 Apr 2012 13:39:14 +0300 [thread overview]
Message-ID: <4F840DD2.3090101@redhat.com> (raw)
In-Reply-To: <20120409194614.GB23053@amt.cnet>
On 04/09/2012 10:46 PM, Marcelo Tosatti wrote:
> Perhaps the mmu_lock hold times by get_dirty are a large component here?
> If that can be alleviated, not only RO->RW faults benefit.
>
>
Currently the longest holder in normal use is probably reading the dirty
log and write protecting the shadow page tables.
We could fix that by switching to O(1) write protection
(write-protecting PML4Es instead of PTEs). It would be interesting to
combine O(1) write protection with lockless write-enabling.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-04-10 11:07 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-29 9:20 [PATCH 00/13] KVM: MMU: fast page fault Xiao Guangrong
2012-03-29 9:20 ` [PATCH 01/13] KVM: MMU: properly assert spte on rmap_next path Xiao Guangrong
2012-03-29 9:21 ` [PATCH 02/13] KVM: MMU: abstract spte write-protect Xiao Guangrong
2012-03-29 11:11 ` Avi Kivity
2012-03-29 11:51 ` Xiao Guangrong
2012-03-29 9:22 ` [PATCH 03/13] KVM: MMU: split FNAME(prefetch_invalid_gpte) Xiao Guangrong
2012-03-29 13:00 ` Avi Kivity
2012-03-30 3:51 ` Xiao Guangrong
2012-03-29 9:22 ` [PATCH 04/13] KVM: MMU: introduce FNAME(get_sp_gpa) Xiao Guangrong
2012-03-29 13:07 ` Avi Kivity
2012-03-30 5:01 ` Xiao Guangrong
2012-04-01 12:42 ` Avi Kivity
2012-03-29 9:23 ` [PATCH 05/13] KVM: MMU: reset shadow_mmio_mask Xiao Guangrong
2012-03-29 13:10 ` Avi Kivity
2012-03-29 15:28 ` Avi Kivity
2012-03-29 16:24 ` Avi Kivity
2012-03-29 9:23 ` [PATCH 06/13] KVM: VMX: export PFEC.P bit on ept Xiao Guangrong
2012-03-29 9:24 ` [PATCH 07/13] KVM: MMU: store more bits in rmap Xiao Guangrong
2012-03-29 9:25 ` [PATCH 08/13] KVM: MMU: fask check whether page is writable Xiao Guangrong
2012-03-29 15:49 ` Avi Kivity
2012-03-30 5:10 ` Xiao Guangrong
2012-04-01 15:52 ` Avi Kivity
2012-04-05 17:54 ` Xiao Guangrong
2012-04-12 23:08 ` Marcelo Tosatti
2012-04-13 10:26 ` Xiao Guangrong
2012-03-29 9:25 ` [PATCH 09/13] KVM: MMU: get expected spte out of mmu-lock Xiao Guangrong
2012-04-01 15:53 ` Avi Kivity
2012-04-05 18:25 ` Xiao Guangrong
2012-04-09 12:28 ` Avi Kivity
2012-04-09 13:16 ` Takuya Yoshikawa
2012-04-09 13:21 ` Avi Kivity
2012-03-29 9:26 ` [PATCH 10/13] KVM: MMU: store vcpu id in spte to notify page write-protect path Xiao Guangrong
2012-03-29 9:27 ` [PATCH 11/13] KVM: MMU: fast path of handling guest page fault Xiao Guangrong
2012-03-31 12:24 ` Xiao Guangrong
2012-04-01 16:23 ` Avi Kivity
2012-04-03 13:04 ` Avi Kivity
2012-04-05 19:39 ` Xiao Guangrong
2012-03-29 9:27 ` [PATCH 12/13] KVM: MMU: trace fast " Xiao Guangrong
2012-03-29 9:28 ` [PATCH 13/13] KVM: MMU: fix kvm_mmu_pagetable_walk tracepoint Xiao Guangrong
2012-03-29 10:18 ` [PATCH 00/13] KVM: MMU: fast page fault Avi Kivity
2012-03-29 11:40 ` Xiao Guangrong
2012-03-29 12:57 ` Avi Kivity
2012-03-30 9:18 ` Xiao Guangrong
2012-03-31 13:12 ` Xiao Guangrong
2012-04-01 12:58 ` Avi Kivity
2012-04-05 21:57 ` Xiao Guangrong
2012-04-06 5:24 ` Xiao Guangrong
2012-04-09 13:20 ` Avi Kivity
2012-04-09 13:59 ` Xiao Guangrong
2012-04-09 13:12 ` Avi Kivity
2012-04-09 13:55 ` Xiao Guangrong
2012-04-09 14:01 ` Xiao Guangrong
2012-04-09 14:25 ` Avi Kivity
2012-04-09 17:58 ` Marcelo Tosatti
2012-04-09 18:13 ` Xiao Guangrong
2012-04-09 19:31 ` Marcelo Tosatti
2012-04-09 18:26 ` Xiao Guangrong
2012-04-09 19:46 ` Marcelo Tosatti
2012-04-10 3:06 ` Xiao Guangrong
2012-04-10 10:04 ` Avi Kivity
2012-04-11 1:47 ` Marcelo Tosatti
2012-04-11 9:15 ` Avi Kivity
2012-04-10 10:39 ` Avi Kivity [this message]
2012-04-10 11:40 ` Takuya Yoshikawa
2012-04-10 11:58 ` Xiao Guangrong
2012-04-11 12:15 ` Takuya Yoshikawa
2012-04-11 12:38 ` Xiao Guangrong
2012-04-11 14:14 ` Takuya Yoshikawa
2012-04-11 14:21 ` Avi Kivity
2012-04-11 22:26 ` Takuya Yoshikawa
2012-04-13 14:25 ` Takuya Yoshikawa
2012-04-15 9:32 ` Avi Kivity
2012-04-16 15:49 ` Takuya Yoshikawa
2012-04-16 16:02 ` Avi Kivity
2012-04-17 6:26 ` Xiao Guangrong
2012-04-17 7:51 ` Avi Kivity
2012-04-17 12:37 ` Takuya Yoshikawa
2012-04-17 12:41 ` Avi Kivity
2012-04-17 14:54 ` Takuya Yoshikawa
2012-04-17 14:56 ` Avi Kivity
2012-04-18 13:42 ` Takuya Yoshikawa
2012-04-17 6:16 ` Xiao Guangrong
2012-04-10 10:10 ` Avi Kivity
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