From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michal Hocko <mhocko@kernel.org>
Subject: Re: [PATCH v3] mm/page_owner: use kvmalloc instead of kmalloc
Date: Thu, 1 Nov 2018 11:27:34 +0100
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To: Miles Chen <miles.chen@mediatek.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Joe Perches <joe@perches.com>, Matthew Wilcox <willy@infradead.org>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, wsd_upstream@mediatek.com
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On Thu 01-11-18 18:00:12, Miles Chen wrote:
[...]
> I did a test today, the only code changed is to clamp to read count to
> PAGE_SIZE and it worked well. Maybe we can solve this issue by just
> clamping the read count.
> 
> count = count > PAGE_SIZE ? PAGE_SIZE : count;

This i what Matthew was proposing AFAIR. At least as a stop gap
solution. Maybe we want to extend this to a more standard implementation
later on (e.g. seq_file).
-- 
Michal Hocko
SUSE Labs