Re: [PATCH 02/36] ipc: Add COMPAT_SHMLBA support

From: Will Deacon
Date: Wed Jul 18 2012 - 05:04:09 EST

On Wed, Jul 18, 2012 at 06:53:34AM +0100, Jon Masters wrote:
> On 07/06/2012 05:05 PM, Catalin Marinas wrote:
> > The reason for this patch is that we want SHMLBA to be 64K on AArch64
> Presumably this is to obviate differences between 64K or 4K pages?

Right, we don't have D-side aliasing with AArch64 processors, so SHMLBA can
be left as the minimum alignment requirement, which is PAGE_SIZE.

The compat bit is more fun because userspace expects to see 16k there.

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