Commit 168eeccb authored May 31, 2012 by Tim Bird Committed by Linus Torvalds May 31, 2012

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 <tim.bird@am.sony.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 43e13cc1

kernel/exit.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -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);

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