linux-kernel - Re: oom-killer

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Message-ID: <20190806151123.GI11812@dhcp22.suse.cz>
Date:   Tue, 6 Aug 2019 17:11:23 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Pankaj Suryawanshi <pankajssuryawanshi@...il.com>
Cc:     Vlastimil Babka <vbabka@...e.cz>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, pankaj.suryawanshi@...fochips.com
Subject: Re: oom-killer

On Tue 06-08-19 20:25:51, Pankaj Suryawanshi wrote:
[...]
> lowmem reserve ? it is min_free_kbytes or something else.

Nope. Lowmem rezerve is a measure to protect from allocations targetting
higher zones (have a look at setup_per_zone_lowmem_reserve). The value
for each zone depends on the amount of memory managed by the zone
and the ratio which can be tuned from the userspace. min_free_kbytes
controls reclaim watermarks.

-- 
Michal Hocko
SUSE Labs