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Date: Fri, 16 Oct 2020 14:37:08 +0200
From: osalvador@...e.de
To: Michal Hocko <mhocko@...e.com>
Cc: Shijie Luo <luoshijie1@...wei.com>, akpm@...ux-foundation.org,
linux-mm@...ck.org, linux-kernel@...r.kernel.org,
linmiaohe@...wei.com, linfeilong@...wei.com
Subject: Re: [PATCH] mm: fix potential pte_unmap_unlock pte error
On 2020-10-16 14:31, Michal Hocko wrote:
> I do not like the fix though. The code is really confusing. Why should
> we check for flags in each iteration of the loop when it cannot change?
> Also why should we take the ptl lock in the first place when the look
> is
> broken out immediately?
About checking the flags:
https://lore.kernel.org/linux-mm/20190320081643.3c4m5tec5vx653sn@d104.suse.de/#t
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