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From: Vlastimil Babka <vbabka@suse.cz>
To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
	Konstantin Khlebnikov <koct9i@gmail.com>
Subject: Re: [PATCH] mm, migrate: count pages failing all retries in vmstat and tracepoint
Date: Thu, 27 Aug 2015 23:35:40 +0200	[thread overview]
Message-ID: <55DF82AC.8010907@suse.cz> (raw)
In-Reply-To: <alpine.DEB.2.10.1508271401040.30543@chino.kir.corp.google.com>

On 27.8.2015 23:02, David Rientjes wrote:
> On Thu, 27 Aug 2015, Vlastimil Babka wrote:
> 
>> Migration tries up to 10 times to migrate pages that return -EAGAIN until it
>> gives up. If some pages fail all retries, they are counted towards the number
>> of failed pages that migrate_pages() returns. They should also be counted in
>> the /proc/vmstat pgmigrate_fail and in the mm_migrate_pages tracepoint.
>>
>> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
> 
> Acked-by: David Rientjes <rientjes@google.com>

Thanks.

> I assume nothing else other than stats and tracepoints are affected by 
> this and this isn't a critical bugfix :)

Yep, no stable needed :)

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WARNING: multiple messages have this Message-ID (diff)
From: Vlastimil Babka <vbabka@suse.cz>
To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
	Konstantin Khlebnikov <koct9i@gmail.com>
Subject: Re: [PATCH] mm, migrate: count pages failing all retries in vmstat and tracepoint
Date: Thu, 27 Aug 2015 23:35:40 +0200	[thread overview]
Message-ID: <55DF82AC.8010907@suse.cz> (raw)
In-Reply-To: <alpine.DEB.2.10.1508271401040.30543@chino.kir.corp.google.com>

On 27.8.2015 23:02, David Rientjes wrote:
> On Thu, 27 Aug 2015, Vlastimil Babka wrote:
> 
>> Migration tries up to 10 times to migrate pages that return -EAGAIN until it
>> gives up. If some pages fail all retries, they are counted towards the number
>> of failed pages that migrate_pages() returns. They should also be counted in
>> the /proc/vmstat pgmigrate_fail and in the mm_migrate_pages tracepoint.
>>
>> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
> 
> Acked-by: David Rientjes <rientjes@google.com>

Thanks.

> I assume nothing else other than stats and tracepoints are affected by 
> this and this isn't a critical bugfix :)

Yep, no stable needed :)


  reply	other threads:[~2015-08-27 21:35 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-27 14:20 [PATCH] mm, migrate: count pages failing all retries in vmstat and tracepoint Vlastimil Babka
2015-08-27 14:20 ` Vlastimil Babka
2015-08-27 21:02 ` David Rientjes
2015-08-27 21:02   ` David Rientjes
2015-08-27 21:35   ` Vlastimil Babka [this message]
2015-08-27 21:35     ` Vlastimil Babka

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