linux-kernel - Re: [PATCH v3 07/15] KVM: MMU: introduce nulls desc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAEbWaipqSpf4PdRo6YD=xBjucdWjZrs0Mibfi+jJeF7uj-NaCw@mail.gmail.com>
Date:	Mon, 25 Nov 2013 14:48:37 +0200
From:	Avi Kivity <avi.kivity@...il.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
Cc:	Marcelo Tosatti <mtosatti@...hat.com>,
	Gleb Natapov <gleb@...hat.com>,
	"pbonzini@...hat.com Bonzini" <pbonzini@...hat.com>,
	linux-kernel@...r.kernel.org, kvm <kvm@...r.kernel.org>,
	Eric Dumazet <dada1@...mosbay.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v3 07/15] KVM: MMU: introduce nulls desc

On Mon, Nov 25, 2013 at 8:11 AM, Xiao Guangrong
<xiaoguangrong@...ux.vnet.ibm.com> wrote:
>
> On Nov 23, 2013, at 3:14 AM, Marcelo Tosatti <mtosatti@...hat.com> wrote:

<snip complicated stuff about parent_pte>

I'm not really following, but note that parent_pte predates EPT (and
the use of rcu in kvm), so all the complexity that is the result of
trying to pack as many list entries into a cache line can be dropped.
Most setups now would have exactly one list entry, which is handled
specially antyway.

Alternatively, the trick of storing multiple entries in one list entry
can be moved to generic code, it may be useful to others.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/