Re: [PATCH] perf mem/c2c: Fix perf_mem_events to support powerpc

From: Michael Ellerman
Date: Tue Jan 29 2019 - 04:45:51 EST

Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxx> writes:

> On 1/14/19 9:44 AM, Ravi Bangoria wrote:
>> Powerpc hw does not have inbuilt latency filter (--ldlat) for mem-load
>> event and, perf_mem_events by default includes ldlat=30 which is
>> causing failure on powerpc. Refactor code to support perf mem/c2c on
>> powerpc.
>> This patch depends on kernel side changes done my Madhavan:
>> Signed-off-by: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxx>
> Arnaldo / Michael, Any thoughts?

I haven't merged the kernel patch, I think because Maddy told me not to
because it would break the userspace tooling :)

What is the actual dependency between them? ie. should we merge the
kernel fix first or second or what?