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| author | Suren Baghdasaryan <surenb@google.com> | 2021-09-03 00:54:47 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-03 19:58:12 +0300 |
| commit | 56cab2859fbe08e1f2a5ac3f4655dcc398bc013d (patch) | |
| tree | f001c7c7f99e1ca4451ae263015ca7ccd1e07c91 /mm/swapfile.c | |
| parent | 1e6decf30af5c5c75445ed6ad4e65a26de578a03 (diff) | |
| download | linux-56cab2859fbe08e1f2a5ac3f4655dcc398bc013d.tar.xz | |
mm, memcg: add mem_cgroup_disabled checks in vmpressure and swap-related functions
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 [1]
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.
[1] https://lkml.org/lkml/2006/8/29/294 also used in mmtests suite
Link: https://lkml.kernel.org/r/20210713010934.299876-1-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Alex Shi <alexs@kernel.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 7527afd95284..627b16aed1dc 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -3784,6 +3784,9 @@ void cgroup_throttle_swaprate(struct page *page, gfp_t gfp_mask) struct swap_info_struct *si, *next; int nid = page_to_nid(page); + if (mem_cgroup_disabled()) + return; + if (!(gfp_mask & __GFP_IO)) return; |