diff options
| author | liwenyu <wenyuli@ex.bilibili.com> | 2023-09-20 17:38:49 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-06 14:44:10 -0700 |
| commit | 76a0fb4fd5c940fe4977f2fbdb08167fa16e32f6 (patch) | |
| tree | 244ced6cc521dc7a2001d09dd3c038af07045eb5 /mm/vmscan.c | |
| parent | 7ced098fcfe596feab3cea4f40128b0119c7bf1a (diff) | |
delayacct: add memory reclaim delay in get_page_from_freelist
The current memory reclaim delay statistics only count the direct memory
reclaim of the task in do_try_to_free_pages(). In systems with NUMA open,
some tasks occasionally experience slower response times, but the total
count of reclaim does not increase, using ftrace can show that
node_reclaim has occurred.
The memory reclaim occurring in get_page_from_freelist() is also due to
heavy memory load. To get the impact of tasks in memory reclaim, this
patch adds the statistics of the memory reclaim delay statistics for
__node_reclaim().
Link: https://lkml.kernel.org/r/181C946095F0252B+7cc60eca-1abf-4502-aad3-ffd8ef89d910@ex.bilibili.com
Signed-off-by: Wen Yu Li <wenyuli@ex.bilibili.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: <wangyun@bilibili.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 3df0e2a59052..55424215f759 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -7326,6 +7326,7 @@ static int __node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned in cond_resched(); psi_memstall_enter(&pflags); + delayacct_freepages_start(); fs_reclaim_acquire(sc.gfp_mask); /* * We need to be able to allocate from the reserves for RECLAIM_UNMAP @@ -7348,6 +7349,7 @@ static int __node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned in memalloc_noreclaim_restore(noreclaim_flag); fs_reclaim_release(sc.gfp_mask); psi_memstall_leave(&pflags); + delayacct_freepages_end(); trace_mm_vmscan_node_reclaim_end(sc.nr_reclaimed); |