From 168eeccbc956d2ec083c3a513f7706784ee0dc5f Mon Sep 17 00:00:00 2001 From: Tim Bird Date: Thu, 31 May 2012 16:26:16 -0700 Subject: [PATCH] stack usage: add pid to warning printk in check_stack_usage In embedded systems, sometimes the same program (busybox) is the cause of multiple warnings. Outputting the pid with the program name in the warning printk helps distinguish which instances of a program are using the stack most. This is a small patch, but useful. Signed-off-by: Tim Bird Cc: Oleg Nesterov Cc: Frederic Weisbecker Cc: Andrea Arcangeli Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/exit.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/exit.c b/kernel/exit.c index 3281493ce7ad..6d85655353e9 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -884,9 +884,9 @@ static void check_stack_usage(void) spin_lock(&low_water_lock); if (free < lowest_to_date) { - printk(KERN_WARNING "%s used greatest stack depth: %lu bytes " - "left\n", - current->comm, free); + printk(KERN_WARNING "%s (%d) used greatest stack depth: " + "%lu bytes left\n", + current->comm, task_pid_nr(current), free); lowest_to_date = free; } spin_unlock(&low_water_lock); -- 2.20.1