linux-kernel - Re: [PATCH v3 1/5] mm,hugetlb: Change mechanism to detect a COW on private mapping

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Message-ID: <aGGeFrPwAxsu-f3F@localhost.localdomain>
Date: Sun, 29 Jun 2025 22:12:06 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Oscar Salvador <osalvador.vilardaga@...il.com>
Cc: Gavin Guo <gavinguo@...lia.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Hildenbrand <david@...hat.com>,
	Muchun Song <muchun.song@...ux.dev>, Peter Xu <peterx@...hat.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/5] mm,hugetlb: Change mechanism to detect a COW on
 private mapping

On Sun, Jun 29, 2025 at 07:49:51PM +0200, Oscar Salvador wrote:
> Are there any considerations to be taken before kicking in the test?
> I don't seem to be able to reproduce the issue.

Nevermind, I just wrote my own reproducer.
I see two ways of fixing this, the simpler being a trylock instead of a
lock, like the original code did.
I'll sleep on it and fix it tomorrow.
 

-- 
Oscar Salvador
SUSE Labs