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Re: [PATCH] remap_file_pages needs to check for cache coherency

To: John David Anglin <dave.anglin@bell.net>
Subject: Re: [PATCH] remap_file_pages needs to check for cache coherency
From: John David Anglin <dave.anglin@bell.net>
Date: Fri, 27 Dec 2013 15:14:39 -0500
Cc: Matthew Wilcox <willy@linux.intel.com>, linux-mm@kvack.org, "David S. Miller" <davem@davemloft.net>, sparclinux@vger.kernel.org, linux-parisc@vger.kernel.org, linux-mips@linux-mips.org
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On 27-Dec-13, at 2:47 PM, John David Anglin wrote:

It's worth looking at. The value is supposed to be returned by the PDC_CACHE PDC call but I know my rp3440 returns a value of 0 indicating that the aliasing boundary
is unknown and may be greater than 16MB.

c3750 data cache has an aliasing boundary of 4 MB, so I think we are stuck with large
SHMLBA.

Dave
--
John David Anglin       dave.anglin@bell.net




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