Re: [PATCH v2 5/8] perf auxtrace: Change to use SMP memory barriers

[Peter Zijlstra]

On Wed, Jun 02, 2021 at 06:30:04PM +0800, Leo Yan wrote:
> The kernel and the userspace tool can access the AUX ring buffer head
> and tail from different CPUs, thus SMP class of barriers are required
> on SMP system.
> 
> This patch changes to use SMP barriers to replace mb() and rmb()
> barriers.
> 
> Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>

Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>