linux-kernel - Re: [PATCH v4 0/2] mm/highmem: make kmap cache coloring aware

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Message-ID: <20140825171600.GH25892@linux-mips.org>
Date:	Mon, 25 Aug 2014 19:16:00 +0200
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Max Filippov <jcmvbkbc@...il.com>
Cc:	linux-xtensa@...ux-xtensa.org, Chris Zankel <chris@...kel.net>,
	Marc Gauthier <marc@...ence.com>, linux-mm@...ck.org,
	linux-arch@...r.kernel.org, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org, David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Leonid Yegoshin <Leonid.Yegoshin@...tec.com>,
	Steven Hill <Steven.Hill@...tec.com>
Subject: Re: [PATCH v4 0/2] mm/highmem: make kmap cache coloring aware

On Sat, Aug 02, 2014 at 05:11:37AM +0400, Max Filippov wrote:

> this series adds mapping color control to the generic kmap code, allowing
> architectures with aliasing VIPT cache to use high memory. There's also
> use example of this new interface by xtensa.

I haven't actually ported this to MIPS but it certainly appears to be
the right framework to get highmem aliases handled on MIPS, too.

Though I still consider increasing PAGE_SIZE to 16k the preferable
solution because it will entirly do away with cache aliases.

Thanks,

  Ralf
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