From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
To: Xishi Qiu <qiuxishi@huawei.com>
Cc: David Rientjes <rientjes@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Linux MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] mem-hotplug: use GFP_HIGHUSER_MOVABLE in, alloc_migrate_target()
Date: Mon, 18 Jul 2016 14:51:50 +0900 [thread overview]
Message-ID: <20160718055150.GF9460@js1304-P5Q-DELUXE> (raw)
In-Reply-To: <57884EAA.9030603@huawei.com>
On Fri, Jul 15, 2016 at 10:47:06AM +0800, Xishi Qiu wrote:
> alloc_migrate_target() is called from migrate_pages(), and the page
> is always from user space, so we can add __GFP_HIGHMEM directly.
No, all migratable pages are not from user space. For example,
blockdev file cache has __GFP_MOVABLE and migratable but it has no
__GFP_HIGHMEM and __GFP_USER.
And, zram's memory isn't GFP_HIGHUSER_MOVABLE but has __GFP_MOVABLE.
Thanks.
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next prev parent reply other threads:[~2016-07-18 5:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-15 2:47 Xishi Qiu
2016-07-15 2:51 ` [PATCH 2/2] mem-hotplug: use different mempolicy in alloc_migrate_target() Xishi Qiu
2016-07-18 8:00 ` Vlastimil Babka
2016-07-18 5:51 ` Joonsoo Kim [this message]
2016-07-18 7:45 ` [PATCH 1/2] mem-hotplug: use GFP_HIGHUSER_MOVABLE in, alloc_migrate_target() Vlastimil Babka
2016-07-18 8:00 ` Xishi Qiu
2016-07-18 8:05 ` Vlastimil Babka
2016-07-18 8:31 ` Xishi Qiu
2016-07-19 6:50 ` Joonsoo Kim
2016-07-19 7:18 ` Xishi Qiu
2016-07-19 19:05 ` David Rientjes
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