From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org (Andrew Morton) Date: Tue, 26 Aug 2014 16:10:00 -0700 Subject: [PATCH 0/2] ARM: Remove lowmem limit for default CMA region In-Reply-To: <1408610714-16204-1-git-send-email-m.szyprowski@samsung.com> References: <1408610714-16204-1-git-send-email-m.szyprowski@samsung.com> Message-ID: <20140826161000.c760fadf0d7223372524d2ce@linux-foundation.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, 21 Aug 2014 10:45:12 +0200 Marek Szyprowski wrote: > Russell King recently noticed that limiting default CMA region only to > low memory on ARM architecture causes serious memory management issues > with machines having a lot of memory (which is mainly available as high > memory). More information can be found the following thread: > http://thread.gmane.org/gmane.linux.ports.arm.kernel/348441/ > > Those two patches removes this limit letting kernel to put default CMA > region into high memory when this is possible (there is enough high > memory available and architecture specific DMA limit fits). > > This should solve strange OOM issues on systems with lots of RAM > (i.e. >1GiB) and large (>256M) CMA area. What do we think is the priority on these fixes? 3.17 or 3.18?