From: Michel Lespinasse <walken@google.com>
To: Mel Gorman <mgorman@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Lin Feng <linfeng@cn.fujitsu.com>,
bcrl@kvack.org, viro@zeniv.linux.org.uk, khlebnikov@openvz.org,
kamezawa.hiroyu@jp.fujitsu.com, minchan@kernel.org,
riel@redhat.com, rientjes@google.com,
isimatu.yasuaki@jp.fujitsu.com, wency@cn.fujitsu.com,
laijs@cn.fujitsu.com, jiang.liu@huawei.com, linux-mm@kvack.org,
linux-aio@kvack.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] mm: hotplug: implement non-movable version of get_user_pages() called get_user_pages_non_movable()
Date: Tue, 5 Feb 2013 18:26:51 -0800 [thread overview]
Message-ID: <CANN689GVFYTqs0wxX3bKZtyBcWf6=gLvS8hFG-65htsnPDknSA@mail.gmail.com> (raw)
In-Reply-To: <20130205115722.GF21389@suse.de>
Just nitpicking, but:
On Tue, Feb 5, 2013 at 3:57 AM, Mel Gorman <mgorman@suse.de> wrote:
> +static inline bool zone_is_idx(struct zone *zone, enum zone_type idx)
> +{
> + /* This mess avoids a potentially expensive pointer subtraction. */
> + int zone_off = (char *)zone - (char *)zone->zone_pgdat->node_zones;
> + return zone_off == idx * sizeof(*zone);
> +}
Maybe:
return zone == zone->zone_pgdat->node_zones + idx;
?
--
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
--
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next prev parent reply other threads:[~2013-02-06 2:26 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-04 10:04 [PATCH 0/2] mm: hotplug: implement non-movable version of get_user_pages() to kill long-time pin pages Lin Feng
2013-02-04 10:04 ` [PATCH 1/2] mm: hotplug: implement non-movable version of get_user_pages() called get_user_pages_non_movable() Lin Feng
2013-02-05 0:06 ` Andrew Morton
2013-02-05 0:18 ` Andrew Morton
2013-02-05 3:09 ` Lin Feng
2013-02-05 21:13 ` Andrew Morton
2013-02-05 11:57 ` Mel Gorman
2013-02-05 13:32 ` Mel Gorman
2013-02-19 13:37 ` Lin Feng
2013-02-20 2:34 ` Lin Feng
2013-02-20 2:44 ` Wanpeng Li
2013-02-20 2:44 ` Wanpeng Li
[not found] ` <20130220024435.GA30208@hacker.(null)>
2013-02-20 2:59 ` Lin Feng
2013-02-20 9:58 ` Simon Jeons
2013-02-20 10:23 ` Lin Feng
2013-02-20 11:31 ` Simon Jeons
2013-02-20 11:54 ` Lin Feng
2013-02-06 2:26 ` Michel Lespinasse [this message]
2013-02-06 10:41 ` Mel Gorman
2013-02-18 10:34 ` Lin Feng
2013-02-18 15:17 ` Mel Gorman
2013-02-19 9:55 ` Lin Feng
2013-02-19 10:34 ` Mel Gorman
2013-02-04 10:04 ` [PATCH 2/2] fs/aio.c: use get_user_pages_non_movable() to pin ring pages when support memory hotremove Lin Feng
2013-02-04 15:18 ` Jeff Moyer
2013-02-04 23:02 ` Zach Brown
2013-02-05 5:35 ` Lin Feng
2013-02-05 5:06 ` Lin Feng
2013-02-05 0:58 ` [PATCH 0/2] mm: hotplug: implement non-movable version of get_user_pages() to kill long-time pin pages Minchan Kim
2013-02-05 4:42 ` Lin Feng
2013-02-05 5:25 ` Minchan Kim
2013-02-05 6:18 ` Lin Feng
2013-02-05 7:45 ` Minchan Kim
2013-02-05 8:27 ` Lin Feng
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