+ =utf-8bw1bbveniigxpbnv4lw5lehrdbw0sig9vbtpkdw1wx3rhc2tzigfkzcbyc3mgzgv0ywlszwqgaw5mb3jtyxrpb24gchjpbnrpbmc==.patch added to mm-unstable branch

+ =utf-8bw1bbveniigxpbnv4lw5lehrdbw0sig9vbtpkdw1wx3rhc2tzigfkzcbyc3mgzgv0ywlszwqgaw5mb3jtyxrpb24gchjpbnrpbmc==.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm, oom:dump_tasks add rss detailed information printing
has been added to the -mm mm-unstable branch.  Its filename is
     =utf-8bw1bbveniigxpbnv4lw5lehrdbw0sig9vbtpkdw1wx3rhc2tzigfkzcbyc3mgzgv0ywlszwqgaw5mb3jtyxrpb24gchjpbnrpbmc==.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/=utf-8bw1bbveniigxpbnv4lw5lehrdbw0sig9vbtpkdw1wx3rhc2tzigfkzcbyc3mgzgv0ywlszwqgaw5mb3jtyxrpb24gchjpbnrpbmc==.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Yong Wang <wang.yong12@zte.com.cn>
Subject: mm, oom:dump_tasks add rss detailed information printing
Date: Thu, 23 Nov 2023 18:40:18 +0800 (CST)

When the system is under oom, it prints out the RSS information of each
process.  However, we don't know the size of rss_anon, rss_file, and
rss_shmem.

To distinguish the memory occupied by anonymous or file mappings
or shmem, could help us identify the root cause of the oom.

So this patch adds RSS details, which refers to the /proc/<pid>/status[1].
It can help us know more about process memory usage.

Example of oom including the new rss_* fields:
[ 1630.902466] Tasks state (memory values in pages):
[ 1630.902870] [  pid  ]   uid  tgid total_vm      rss rss_anon rss_file rss_shmem pgtables_bytes swapents oom_score_adj name
[ 1630.903619] [    149]     0   149      486      288        0      288         0    36864        0             0 ash
[ 1630.904210] [    156]     0   156   153531   153345   153345        0         0  1269760        0             0 mm_test

[1] commit 8cee852ec53f ("mm, procfs: breakdown RSS for anon, shmem and file in /proc/pid/status").

Link: https://lkml.kernel.org/r/202311231840181856667@zte.com.cn
Signed-off-by: Yong Wang <wang.yong12@zte.com.cn>
Reviewed-by: Yang Yang <yang.yang29@zte.com.cn>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Xuexin Jiang <jiang.xuexin@zte.com.cn>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/oom_kill.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/mm/oom_kill.c~=utf-8bw1bbveniigxpbnv4lw5lehrdbw0sig9vbtpkdw1wx3rhc2tzigfkzcbyc3mgzgv0ywlszwqgaw5mb3jtyxrpb24gchjpbnrpbmc==
+++ a/mm/oom_kill.c
@@ -399,10 +399,11 @@ static int dump_task(struct task_struct
 		return 0;
 	}
 
-	pr_info("[%7d] %5d %5d %8lu %8lu %8ld %8lu         %5hd %s\n",
+	pr_info("[%7d] %5d %5d %8lu %8lu %8lu %8lu %9lu %8ld %8lu         %5hd %s\n",
 		task->pid, from_kuid(&init_user_ns, task_uid(task)),
 		task->tgid, task->mm->total_vm, get_mm_rss(task->mm),
-		mm_pgtables_bytes(task->mm),
+		get_mm_counter(task->mm, MM_ANONPAGES), get_mm_counter(task->mm, MM_FILEPAGES),
+		get_mm_counter(task->mm, MM_SHMEMPAGES), mm_pgtables_bytes(task->mm),
 		get_mm_counter(task->mm, MM_SWAPENTS),
 		task->signal->oom_score_adj, task->comm);
 	task_unlock(task);
@@ -423,7 +424,7 @@ static int dump_task(struct task_struct
 static void dump_tasks(struct oom_control *oc)
 {
 	pr_info("Tasks state (memory values in pages):\n");
-	pr_info("[  pid  ]   uid  tgid total_vm      rss pgtables_bytes swapents oom_score_adj name\n");
+	pr_info("[  pid  ]   uid  tgid total_vm      rss rss_anon rss_file rss_shmem pgtables_bytes swapents oom_score_adj name\n");
 
 	if (is_memcg_oom(oc))
 		mem_cgroup_scan_tasks(oc->memcg, dump_task, oc);
_

Patches currently in -mm which might be from wang.yong12@zte.com.cn are

=utf-8bw1bbveniigxpbnv4lw5lehrdbw0sig9vbtpkdw1wx3rhc2tzigfkzcbyc3mgzgv0ywlszwqgaw5mb3jtyxrpb24gchjpbnrpbmc==.patch