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| author | Tejun Heo <tj@kernel.org> | 2018-07-03 11:14:56 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-07-09 09:07:54 -0600 |
| commit | 2cf855837b89d92996cf264713f3bed2bf9b0b4f (patch) | |
| tree | d2e61e78a5dce7925bebb7c50d345838aa948b4a /include/linux/swap.h | |
| parent | d09d8df3a29403693d9d20cc34ed101f2c558e2b (diff) | |
| download | linux-2cf855837b89d92996cf264713f3bed2bf9b0b4f.tar.gz linux-2cf855837b89d92996cf264713f3bed2bf9b0b4f.tar.bz2 linux-2cf855837b89d92996cf264713f3bed2bf9b0b4f.zip | |
memcontrol: schedule throttling if we are congested
Memory allocations can induce swapping via kswapd or direct reclaim. If
we are having IO done for us by kswapd and don't actually go into direct
reclaim we may never get scheduled for throttling. So instead check to
see if our cgroup is congested, and if so schedule the throttling.
Before we return to user space the throttling stuff will only throttle
if we actually required it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/swap.h')
| -rw-r--r-- | include/linux/swap.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index c063443d8638..1a8bd05a335e 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -629,7 +629,6 @@ static inline int mem_cgroup_swappiness(struct mem_cgroup *memcg) return memcg->swappiness; } - #else static inline int mem_cgroup_swappiness(struct mem_cgroup *mem) { @@ -637,6 +636,16 @@ static inline int mem_cgroup_swappiness(struct mem_cgroup *mem) } #endif +#if defined(CONFIG_SWAP) && defined(CONFIG_MEMCG) && defined(CONFIG_BLK_CGROUP) +extern void mem_cgroup_throttle_swaprate(struct mem_cgroup *memcg, int node, + gfp_t gfp_mask); +#else +static inline void mem_cgroup_throttle_swaprate(struct mem_cgroup *memcg, + int node, gfp_t gfp_mask) +{ +} +#endif + #ifdef CONFIG_MEMCG_SWAP extern void mem_cgroup_swapout(struct page *page, swp_entry_t entry); extern int mem_cgroup_try_charge_swap(struct page *page, swp_entry_t entry); |