perf core: Allocate perf_buffer in the target node memory
I found the ring buffer pages are allocated in the node but the ring buffer itself is not. Let's convert it to use kzalloc_node() too. Signed-off-by:Namhyung Kim <namhyung@kernel.org> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210315033436.682438-1-namhyung@kernel.org
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