linux-kernel - Re: [PATCH] net/mlx4_en: do batched put_page using atomic

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Date:	Tue, 19 Apr 2016 20:07:09 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	khlebnikov@...dex-team.ru
Cc:	netdev@...r.kernel.org, yishaih@...lanox.com, eugenia@...lanox.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/mlx4_en: do batched put_page using atomic_sub

From: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Date: Mon, 18 Apr 2016 14:34:05 +0300

> This patch fixes couple error paths after allocation failures.
> Atomic set of page reference counter is safe only if it is zero,
> otherwise set can race with any speculative get_page_unless_zero.
> 
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>

Applied.