From: catalin.marinas@arm•com (Catalin Marinas)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCHv2] arm64: Add atomic pool for non-coherent and CMA allocaitons.
Date: Mon, 9 Jun 2014 10:27:26 +0100 [thread overview]
Message-ID: <20140609092725.GB25590@arm.com> (raw)
In-Reply-To: <539262FA.8010301@codeaurora.org>
On Sat, Jun 07, 2014 at 01:55:22AM +0100, Laura Abbott wrote:
> On 6/5/2014 10:05 AM, Catalin Marinas wrote:
> > On Mon, Jun 02, 2014 at 09:03:52PM +0100, Laura Abbott wrote:
> >> Neither CMA nor noncoherent allocations support atomic allocations.
> >> Add a dedicated atomic pool to support this.
> >
> > CMA indeed doesn't support atomic allocations but swiotlb does, the only
> > problem being the vmap() to create a non-cacheable mapping. Could we not
> > use the atomic pool only for non-coherent allocations?
>
> CMA needs the atomic pool for both non-coherent and coherent allocations.
> Perhaps I should update the code so we only create the coherent atomic
> pool if CMA is used.
It's also needed with non-coherent swiotlb because of vmap (but coherent
is fine).
--
Catalin
prev parent reply other threads:[~2014-06-09 9:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-02 20:03 [PATCHv2] arm64: Add atomic pool for non-coherent and CMA allocaitons Laura Abbott
2014-06-03 0:23 ` David Riley
2014-06-03 13:28 ` Will Deacon
2014-06-04 0:30 ` Laura Abbott
2014-06-04 17:59 ` Will Deacon
2014-06-05 17:05 ` Catalin Marinas
2014-06-07 0:55 ` Laura Abbott
2014-06-09 9:27 ` Catalin Marinas [this message]
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