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From: Tang Chen <tangchen@cn.fujitsu.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>, <pbonzini@redhat.com>,
	<tglx@linutronix.de>, <mingo@redhat.com>, <hpa@zytor.com>,
	<mgorman@suse.de>, <yinghai@kernel.org>,
	<isimatu.yasuaki@jp.fujitsu.com>, <guz.fnst@cn.fujitsu.com>,
	<laijs@cn.fujitsu.com>, <kvm@vger.kernel.org>,
	<linux-mm@kvack.org>, <x86@kernel.org>,
	<linux-kernel@vger.kernel.org>, Avi Kivity <avi.kivity@gmail.com>,
	Tang Chen <tangchen@cn.fujitsu.com>
Subject: Re: [RFC PATCH 1/1] Move two pinned pages to non-movable node in kvm.
Date: Mon, 23 Jun 2014 09:48:32 +0800	[thread overview]
Message-ID: <53A78770.7080108@cn.fujitsu.com> (raw)
In-Reply-To: <20140620203903.GA7838@amt.cnet>

Hi Marcelo, Gleb,

Sorry for the delayed reply and thanks for the advices.

On 06/21/2014 04:39 AM, Marcelo Tosatti wrote:
> On Fri, Jun 20, 2014 at 05:31:46PM -0300, Marcelo Tosatti wrote:
>>> IIRC your shadow page pinning patch series support flushing of ptes
>>> by mmu notifier by forcing MMU reload and, as a result, faulting in of
>>> pinned pages during next entry.  Your patch series does not pin pages
>>> by elevating their page count.
>>
>> No but PEBS series does and its required to stop swap-out
>> of the page.
>
> Well actually no because of mmu notifiers.
>
> Tang, can you implement mmu notifiers for the other breaker of
> mem hotplug ?

I'll try the mmu notifier idea and send a patch soon.

Thanks.

--
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WARNING: multiple messages have this Message-ID (diff)
From: Tang Chen <tangchen@cn.fujitsu.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>,
	pbonzini@redhat.com, tglx@linutronix.de, mingo@redhat.com,
	hpa@zytor.com, mgorman@suse.de, yinghai@kernel.org,
	isimatu.yasuaki@jp.fujitsu.com, guz.fnst@cn.fujitsu.com,
	laijs@cn.fujitsu.com, kvm@vger.kernel.org, linux-mm@kvack.org,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	Avi Kivity <avi.kivity@gmail.com>,
	Tang Chen <tangchen@cn.fujitsu.com>
Subject: Re: [RFC PATCH 1/1] Move two pinned pages to non-movable node in kvm.
Date: Mon, 23 Jun 2014 09:48:32 +0800	[thread overview]
Message-ID: <53A78770.7080108@cn.fujitsu.com> (raw)
In-Reply-To: <20140620203903.GA7838@amt.cnet>

Hi Marcelo, Gleb,

Sorry for the delayed reply and thanks for the advices.

On 06/21/2014 04:39 AM, Marcelo Tosatti wrote:
> On Fri, Jun 20, 2014 at 05:31:46PM -0300, Marcelo Tosatti wrote:
>>> IIRC your shadow page pinning patch series support flushing of ptes
>>> by mmu notifier by forcing MMU reload and, as a result, faulting in of
>>> pinned pages during next entry.  Your patch series does not pin pages
>>> by elevating their page count.
>>
>> No but PEBS series does and its required to stop swap-out
>> of the page.
>
> Well actually no because of mmu notifiers.
>
> Tang, can you implement mmu notifiers for the other breaker of
> mem hotplug ?

I'll try the mmu notifier idea and send a patch soon.

Thanks.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

WARNING: multiple messages have this Message-ID (diff)
From: Tang Chen <tangchen@cn.fujitsu.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>, <pbonzini@redhat.com>,
	<tglx@linutronix.de>, <mingo@redhat.com>, <hpa@zytor.com>,
	<mgorman@suse.de>, <yinghai@kernel.org>,
	<isimatu.yasuaki@jp.fujitsu.com>, <guz.fnst@cn.fujitsu.com>,
	<laijs@cn.fujitsu.com>, <kvm@vger.kernel.org>,
	<linux-mm@kvack.org>, <x86@kernel.org>,
	<linux-kernel@vger.kernel.org>, Avi Kivity <avi.kivity@gmail.com>,
	Tang Chen <tangchen@cn.fujitsu.com>
Subject: Re: [RFC PATCH 1/1] Move two pinned pages to non-movable node in kvm.
Date: Mon, 23 Jun 2014 09:48:32 +0800	[thread overview]
Message-ID: <53A78770.7080108@cn.fujitsu.com> (raw)
In-Reply-To: <20140620203903.GA7838@amt.cnet>

Hi Marcelo, Gleb,

Sorry for the delayed reply and thanks for the advices.

On 06/21/2014 04:39 AM, Marcelo Tosatti wrote:
> On Fri, Jun 20, 2014 at 05:31:46PM -0300, Marcelo Tosatti wrote:
>>> IIRC your shadow page pinning patch series support flushing of ptes
>>> by mmu notifier by forcing MMU reload and, as a result, faulting in of
>>> pinned pages during next entry.  Your patch series does not pin pages
>>> by elevating their page count.
>>
>> No but PEBS series does and its required to stop swap-out
>> of the page.
>
> Well actually no because of mmu notifiers.
>
> Tang, can you implement mmu notifiers for the other breaker of
> mem hotplug ?

I'll try the mmu notifier idea and send a patch soon.

Thanks.

  reply	other threads:[~2014-06-23  1:48 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-18  5:50 [RFC PATCH 1/1] Move two pinned pages to non-movable node in kvm Tang Chen
2014-06-18  5:50 ` Tang Chen
2014-06-18  5:50 ` Tang Chen
2014-06-18  6:12 ` Gleb Natapov
2014-06-18  6:12   ` Gleb Natapov
2014-06-18  6:50   ` Tang Chen
2014-06-18  6:50     ` Tang Chen
2014-06-18  6:50     ` Tang Chen
2014-06-19  9:20     ` Gleb Natapov
2014-06-19  9:20       ` Gleb Natapov
2014-06-19 19:00       ` Marcelo Tosatti
2014-06-19 19:00         ` Marcelo Tosatti
2014-06-20  3:20         ` Tang Chen
2014-06-20  3:20           ` Tang Chen
2014-06-20  3:20           ` Tang Chen
2014-06-20 11:15         ` Gleb Natapov
2014-06-20 11:15           ` Gleb Natapov
2014-06-20 12:53           ` Marcelo Tosatti
2014-06-20 12:53             ` Marcelo Tosatti
2014-06-20 14:26             ` Gleb Natapov
2014-06-20 14:26               ` Gleb Natapov
2014-06-20 20:31               ` Marcelo Tosatti
2014-06-20 20:31                 ` Marcelo Tosatti
2014-06-20 20:39                 ` Marcelo Tosatti
2014-06-20 20:39                   ` Marcelo Tosatti
2014-06-23  1:48                   ` Tang Chen [this message]
2014-06-23  1:48                     ` Tang Chen
2014-06-23  1:48                     ` Tang Chen
2014-06-30  1:45                   ` Tang Chen
2014-06-30  1:45                     ` Tang Chen
2014-06-30  1:45                     ` Tang Chen
2014-06-30  6:00                     ` Gleb Natapov
2014-06-30  6:00                       ` Gleb Natapov
2014-06-30  8:58                       ` Tang Chen
2014-06-30  8:58                         ` Tang Chen
2014-06-30  8:58                         ` Tang Chen
2014-06-22  9:19                 ` Gleb Natapov
2014-06-22  9:19                   ` Gleb Natapov

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