Re: [PATCH 2/9] drivers: base: support cpu cache information interface to userspace via sysfs

Sudeep Holla
2014-06-26T18:41:32Z

Hi,

On 25/06/14 23:23, Russell King - ARM Linux wrote:
> On Wed, Jun 25, 2014 at 06:30:37PM +0100, Sudeep Holla wrote:
>> + coherency_line_size: the minimum amount of data that gets transferred
>
> So, what value to do envision this taking for a CPU where the cache
> line size is 32 bytes, but each cache line has two dirty bits which
> allow it to only evict either the upper or lower 16 bytes depending
> on which are dirty?
>

IIUC most of existing implementations of cacheinfo on various architectures
are representing the cache line size as coherency_line_size, in which case I
need fix the definition in this file.

BTW will there be any architectural way of finding such configuration ?

Regards,
Sudeep