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From: Gioh Kim <gioh.kim@lge.com>
To: Michal Nazarewicz <mina86@mina86.com>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: "Joonsoo Kim" <iamjoonsoo.kim@lge.com>,
	"Mel Gorman" <mgorman@suse.de>, 이건호 <gunho.lee@lge.com>
Subject: [RFC] CMA page migration failure due to buffers on bh_lru
Date: Tue, 24 Jun 2014 10:12:50 +0900	[thread overview]
Message-ID: <53A8D092.4040801@lge.com> (raw)


Hello,

I am trying to apply CMA feature for my platform.
My kernel version, 3.10.x, is not allocating memory from CMA area so that I applied
a Joonsoo Kim's patch (https://lkml.org/lkml/2014/5/28/64).
Now my platform can use CMA area effectively.

But I have many failures to allocate memory from CMA area.
I found the same situation to Laura Abbott's patch descrbing, https://lkml.org/lkml/2012/8/31/313,
that releases buffer-heads attached at CPU's LRU list.

If Joonsoo's patch is applied and/or CMA feature is applied more and more,
buffer-heads problem is going to be serious definitely.

Please look into the Laura's patch again.
I think it must be applied with Joonsoo's patch.

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WARNING: multiple messages have this Message-ID (diff)
From: Gioh Kim <gioh.kim@lge.com>
To: Michal Nazarewicz <mina86@mina86.com>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: "Joonsoo Kim" <iamjoonsoo.kim@lge.com>,
	"Mel Gorman" <mgorman@suse.de>, 이건호 <gunho.lee@lge.com>
Subject: [RFC] CMA page migration failure due to buffers on bh_lru
Date: Tue, 24 Jun 2014 10:12:50 +0900	[thread overview]
Message-ID: <53A8D092.4040801@lge.com> (raw)


Hello,

I am trying to apply CMA feature for my platform.
My kernel version, 3.10.x, is not allocating memory from CMA area so that I applied
a Joonsoo Kim's patch (https://lkml.org/lkml/2014/5/28/64).
Now my platform can use CMA area effectively.

But I have many failures to allocate memory from CMA area.
I found the same situation to Laura Abbott's patch descrbing, https://lkml.org/lkml/2012/8/31/313,
that releases buffer-heads attached at CPU's LRU list.

If Joonsoo's patch is applied and/or CMA feature is applied more and more,
buffer-heads problem is going to be serious definitely.

Please look into the Laura's patch again.
I think it must be applied with Joonsoo's patch.


             reply	other threads:[~2014-06-24  1:12 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-24  1:12 Gioh Kim [this message]
2014-06-24  1:12 ` [RFC] CMA page migration failure due to buffers on bh_lru Gioh Kim
2014-06-26 15:57 ` Michal Nazarewicz
2014-06-26 15:57   ` Michal Nazarewicz
2014-06-26 23:23   ` Gioh Kim
2014-06-26 23:23     ` Gioh Kim
2014-06-29 19:49     ` Laura Abbott
2014-06-29 19:49       ` Laura Abbott
2014-07-01  1:07       ` Gioh Kim
2014-07-01  1:07         ` Gioh Kim
2014-07-01  2:02         ` Laura Abbott
2014-07-01  2:02           ` Laura Abbott
2014-07-02  5:46           ` Andrew Morton
2014-07-02  5:46             ` Andrew Morton
2014-07-03  7:34             ` Gioh Kim
2014-07-03  7:34               ` Gioh Kim

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