[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <181C946095F0252B+7cc60eca-1abf-4502-aad3-ffd8ef89d910@ex.bilibili.com>
Date: Wed, 20 Sep 2023 17:38:49 +0800
From: liwenyu <wenyuli@...bilibili.com>
To: akpm@...ux-foundation.org
Cc: bsingharora@...il.com, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, wangyun@...ibili.com
Subject: [PATCH] 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().
Signed-off-by: Wen Yu Li <wenyuli@...bilibili.com>
---
mm/vmscan.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 6f13394b112e..88be3dedc584 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -8026,6 +8026,7 @@ 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
@@ -8048,6 +8049,7 @@ 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);
--
2.30.2
Powered by blists - more mailing lists