The patch titled
Subject: mm/oom_kill.c: add task UID to info message on an oom kill
has been added to the -mm tree. Its filename is
mm-oom_killer-add-task-uid-to-info-message-on-an-oom-kill.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-oom_killer-add-task-uid-to-info-message-on-an-oom-kill.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-oom_killer-add-task-uid-to-info-message-on-an-oom-kill.patch
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------------------------------------------------------
From: Joel Savitz <jsavitz@xxxxxxxxxx>
Subject: mm/oom_kill.c: add task UID to info message on an oom kill
In the event of an oom kill, useful information about the killed process
is printed to dmesg. Users, especially system administrators, will find
it useful to immediately see the UID of the process.
In the following example, abuse_the_ram is the name of a program that
attempts to iteratively allocate all available memory until it is stopped
by force.
Current message:
Out of memory: Killed process 35389 (abuse_the_ram)
total-vm:133718232kB, anon-rss:129624980kB, file-rss:0kB,
shmem-rss:0kB
Patched message:
Out of memory: Killed process 2739 (abuse_the_ram),
total-vm:133880028kB, anon-rss:129754836kB, file-rss:0kB,
shmem-rss:0kB, UID:0
Link: http://lkml.kernel.org/r/1560362273-534-1-git-send-email-jsavitz@xxxxxxxxxx
Signed-off-by: Joel Savitz <jsavitz@xxxxxxxxxx>
Suggested-by: David Rientjes <rientjes@xxxxxxxxxx>
Acked-by: Rafael Aquini <aquini@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/oom_kill.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/mm/oom_kill.c~mm-oom_killer-add-task-uid-to-info-message-on-an-oom-kill
+++ a/mm/oom_kill.c
@@ -876,12 +876,13 @@ static void __oom_kill_process(struct ta
*/
do_send_sig_info(SIGKILL, SEND_SIG_PRIV, victim, PIDTYPE_TGID);
mark_oom_victim(victim);
- pr_err("%s: Killed process %d (%s) total-vm:%lukB, anon-rss:%lukB, file-rss:%lukB, shmem-rss:%lukB\n",
+ pr_err("%s: Killed process %d (%s) total-vm:%lukB, anon-rss:%lukB, file-rss:%lukB, shmem-rss:%lukB, UID %d\n",
message, task_pid_nr(victim), victim->comm,
K(victim->mm->total_vm),
K(get_mm_counter(victim->mm, MM_ANONPAGES)),
K(get_mm_counter(victim->mm, MM_FILEPAGES)),
- K(get_mm_counter(victim->mm, MM_SHMEMPAGES)));
+ K(get_mm_counter(victim->mm, MM_SHMEMPAGES)),
+ from_kuid(&init_user_ns, task_uid(victim)));
task_unlock(victim);
/*
_
Patches currently in -mm which might be from jsavitz@xxxxxxxxxx are
mm-oom_killer-add-task-uid-to-info-message-on-an-oom-kill.patch
