Re: [patch] mm, memcg: avoid unnecessary function call when memcg is disabled
From: Johannes Weiner <hidden>
Date: 2012-11-20 17:27:11
Also in:
linux-mm, lkml
On Mon, Nov 19, 2012 at 05:44:34PM -0800, David Rientjes wrote:
While profiling numa/core v16 with cgroup_disable=memory on the command line, I noticed mem_cgroup_count_vm_event() still showed up as high as 0.60% in perftop. This occurs because the function is called extremely often even when memcg is disabled. To fix this, inline the check for mem_cgroup_disabled() so we avoid the unnecessary function call if memcg is disabled. Signed-off-by: David Rientjes <redacted>
Acked-by: Johannes Weiner <redacted>