From: Michal Hocko <mhocko@suse.com>
To: Wei Yang <richard.weiyang@gmail.com>
Cc: linux-mm@kvack.org, akpm@linux-foundation.org,
mgorman@techsingularity.net, osalvador@suse.de
Subject: Re: [PATCH] mm, page_alloc: clear zone_movable_pfn if the node doesn't have ZONE_MOVABLE
Date: Wed, 19 Dec 2018 07:56:25 +0100 [thread overview]
Message-ID: <20181219065625.GC10480@dhcp22.suse.cz> (raw)
In-Reply-To: <20181218202743.i5wvlzipzdl54fuq@master>
On Tue 18-12-18 20:27:43, Wei Yang wrote:
[...]
> BTW, would this eat lower zone's memory? For example, has less DMA32?
Yes I think so. If the distribution should be even and some node(s) span
only lower 32b address range then there is no other option than shrink
the DMA32 zone. There is a note
In the
event, a node is too small to have both ZONE_NORMAL and
ZONE_MOVABLE, kernelcore memory will take priority and
other nodes will have a larger ZONE_MOVABLE.
which explains that this might not be the case though.
Btw. I have to say I quite do not like this interface not to mention the
implementation. THere are users to rely on it though so we cannot remove
it. There is a lot of room for cleanups there.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2018-12-19 6:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-16 12:56 Wei Yang
2018-12-17 10:25 ` Michal Hocko
2018-12-17 14:18 ` Wei Yang
2018-12-18 12:14 ` Michal Hocko
2018-12-18 14:39 ` Wei Yang
2018-12-18 14:47 ` Michal Hocko
2018-12-18 20:27 ` Wei Yang
2018-12-19 6:56 ` Michal Hocko [this message]
2018-12-19 12:56 ` Wei Yang
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