From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Pinchart Date: Sun, 26 Oct 2014 12:43:52 +0000 Subject: Re: [PATCH v2 3/4] mm: cma: Ensure that reservations never cross the low/high mem boundary Message-Id: <1436531.s0VJY8ZaKv@avalon> List-Id: References: <1414145922-26042-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> <1414145922-26042-4-git-send-email-laurent.pinchart+renesas@ideasonboard.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org On Friday 24 October 2014 18:26:58 Michal Nazarewicz wrote: > On Fri, Oct 24 2014, Laurent Pinchart wrote: > > Commit 95b0e655f914 ("ARM: mm: don't limit default CMA region only to > > low memory") extended CMA memory reservation to allow usage of high > > memory. It relied on commit f7426b983a6a ("mm: cma: adjust address limit > > to avoid hitting low/high memory boundary") to ensure that the reserved > > block never crossed the low/high memory boundary. While the > > implementation correctly lowered the limit, it failed to consider the > > case where the base..limit range crossed the low/high memory boundary > > with enough space on each side to reserve the requested size on either > > low or high memory. > > > > Rework the base and limit adjustment to fix the problem. The function > > now starts by rejecting the reservation altogether for fixed > > reservations that cross the boundary, tries to reserve from high memory > > first and then falls back to low memory. > > > > Signed-off-by: Laurent Pinchart > > > > Acked-by: Michal Nazarewicz Thank you. Can we get this series merged in v3.18-rc ? -- Regards, Laurent Pinchart