Re: [PATCH 1/3] mm, memcg: add mem_cgroup_disabled checks in vmpressure and swap-related functions
From: Johannes Weiner <hannes@cmpxchg.org>
Date: 2021-07-09 14:41:05
Also in:
linux-mm, lkml
On Thu, Jul 08, 2021 at 05:05:07PM -0700, Suren Baghdasaryan wrote:
Add mem_cgroup_disabled check in vmpressure, mem_cgroup_uncharge_swap and
cgroup_throttle_swaprate functions. This minimizes the memcg overhead in
the pagefault and exit_mmap paths when memcgs are disabled using
cgroup_disable=memory command-line option.
This change results in ~2.1% overhead reduction when running PFT test
comparing {CONFIG_MEMCG=n, CONFIG_MEMCG_SWAP=n} against {CONFIG_MEMCG=y,
CONFIG_MEMCG_SWAP=y, cgroup_disable=memory} configuration on an 8-core
ARM64 Android device.
Signed-off-by: Suren Baghdasaryan <surenb@google.com>Acked-by: Johannes Weiner <hannes@cmpxchg.org>