From: Alexander Graf <agraf@suse.de>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Alexander Graf <agraf@suse.com>,
Liu ping fan <kernelfans@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org, kvm-devel <kvm@vger.kernel.org>,
kvm-ppc <kvm-ppc@vger.kernel.org>
Subject: Re: [PATCH v2] powernv: kvm: make _PAGE_NUMA take effect
Date: Mon, 07 Apr 2014 10:36:21 +0200 [thread overview]
Message-ID: <53426385.2010102@suse.de> (raw)
In-Reply-To: <87bnwdshzu.fsf@linux.vnet.ibm.com>
On 07.04.14 09:42, Aneesh Kumar K.V wrote:
> Alexander Graf <agraf@suse.com> writes:
>
>> On 03.04.14 04:36, Liu ping fan wrote:
>>> Hi Alex, could you help to pick up this patch? since v3.14 kernel can
>>> enable numa fault for powerpc.
>> What bad happens without this patch? We map a page even though it was
>> declared to get NUMA migrated? What happens next?
> Nothing much, we won't be properly accounting the numa access in the
> host. What we want to achieve is to convert a guest access of the page to
> a host fault so that we can do proper numa access accounting in the
> host. This would enable us to migrate the page to the correct numa
> node.
Ok, so no breakages, just less performance. I wouldn't consider it
stable material then :).
Alex
next prev parent reply other threads:[~2014-04-07 8:36 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-21 8:15 [PATCH v2] powernv: kvm: make _PAGE_NUMA take effect Liu Ping Fan
2014-01-21 9:42 ` Aneesh Kumar K.V
2014-01-27 9:11 ` Alexander Graf
2014-01-27 10:28 ` Aneesh Kumar K.V
2014-01-27 10:42 ` Alexander Graf
2014-01-27 15:57 ` Aneesh Kumar K.V
2014-01-27 10:41 ` Paul Mackerras
2014-04-03 2:36 ` Liu ping fan
2014-04-03 11:36 ` Alexander Graf
2014-04-03 11:38 ` Alexander Graf
2014-04-03 11:43 ` Alexander Graf
2014-04-07 7:42 ` Aneesh Kumar K.V
2014-04-07 8:36 ` Alexander Graf [this message]
2014-04-10 3:28 ` Liu ping fan
2014-04-10 10:02 ` Alexander Graf
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