Re: [PATCH] perf_events: improve DS/BTS/PEBS buffer allocation

Peter Zijlstra
2010-09-13T15:24:51Z

On Mon, 2010-09-13 at 17:20 +0200, Stephane Eranian wrote:

> That is the case we the sizes you have chosen today. For DS, we
> could round up to one page for now.

Markus chose the BTS size, for PEBS a single page was plenty since we do
single event things (although we could do multiple for attr.precise_ip <
2).

For DS there's:
kmalloc_node(sizeof(struct ds), GFP_KERNEL | __GFP_ZERO, cpu_node(cpu));