Subject: Re: [PATCH v4 04/11] drivers: base: support cpu cache information interface to userspace via sysfs

From: Sudeep Holla <[email-masked]>
Date: Wed, 17 Sep 2014 18:25:10 +0100

Hi Greg,

On 03/09/14 18:00, Sudeep Holla wrote:
> From: Sudeep Holla <[email-masked]>
>
> This patch adds initial support for providing processor cache information
> to userspace through sysfs interface. This is based on already existing
> implementations(x86, ia64, s390 and powerpc) and hence the interface is
> intended to be fully compatible.
>
> The main purpose of this generic support is to avoid further code
> duplication to support new architectures and also to unify all the existi=
ng
> different implementations.
>
> This implementation maintains the hierarchy of cache objects which reflec=
ts
> the system's cache topology. Cache devices are instantiated as needed as
> CPUs come online. The cache information is replicated per-cpu even if the=
y are
> shared. A per-cpu array of cache information maintained is used mainly fo=
r
> sysfs-related book keeping.
>
> It also implements the shared_cpu_map attribute, which is essential for
> enabling both kernel and user-space to discover the system's overall cach=
e
> topology.
>
> This patch also add the missing ABI documentation for the cacheinfo sysfs
> interface already, which is well defined and widely used.
>

Can you review the first 4 patches in this series please ?

Regards,
Sudeep