[PATCH RFC 1/3] drivers: base: support cpu cache information interface to userspace via sysfs
Sudeep.Holla at arm.com
Fri Jan 10 06:07:39 EST 2014
On 08/01/14 20:26, Greg Kroah-Hartman wrote:
> On Wed, Jan 08, 2014 at 07:26:06PM +0000, Sudeep Holla wrote:
>> From: Sudeep Holla <sudeep.holla at arm.com>
>> This patch adds initial support for providing processor cache information
>> to userspace through sysfs interface. This is based on x86 implementation
>> and hence the interface is intended to be fully compatible.
>> A per-cpu array of cache information maintained is used mainly for
>> sysfs-related book keeping.
>> Signed-off-by: Sudeep Holla <sudeep.holla at arm.com>
>> drivers/base/Makefile | 2 +-
>> drivers/base/cacheinfo.c | 296 ++++++++++++++++++++++++++++++++++++++++++++++
>> include/linux/cacheinfo.h | 43 +++++++
>> 3 files changed, 340 insertions(+), 1 deletion(-)
>> create mode 100644 drivers/base/cacheinfo.c
>> create mode 100644 include/linux/cacheinfo.h
> You are creating sysfs files, yet you didn't add Documentation/ABI/
> information, which is required. Please fix that.
Ah, I overlooked it. But I am not creating any new sysfs files in this series.
I am just trying to unify duplicated code in various architectures.
Since these sysfs files are already created in:
4. arch/x86/kernel/cpu/intel_cacheinfo.c and
also already used by user-space tools like `lscpu` I assumed it's already
I will add it in next version.
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