[v3, 2/3] powerpc/powernv: Enable removal of memory for in memory tracing

[Michael Ellerman]

On Thu, 2017-06-01 at 05:34:39 UTC, Rashmica Gupta wrote:
> The hardware trace macro feature requires access to a chunk of real
> memory. This patch provides a debugfs interface to do this. By
> writing an integer containing the size of memory to be unplugged into
> /sys/kernel/debug/powerpc/memtrace/enable, the code will attempt to
> remove that much memory from the end of each NUMA node.
> 
> This patch also adds additional debugsfs files for each node that
> allows the tracer to interact with the removed memory, as well as
> a trace file that allows userspace to read the generated trace.
> 
> Note that this patch does not invoke the hardware trace macro, it
> only allows memory to be removed during runtime for the trace macro
> to utilise.
> 
> Signed-off-by: Rashmica Gupta <rashmica.g at gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/9d5171a8f248b1b0e69329bf141e17

cheers