Commit 168eeccb authored by Tim Bird's avatar Tim Bird Committed by Linus Torvalds

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: default avatarTim 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 43e13cc1
...@@ -884,9 +884,9 @@ static void check_stack_usage(void) ...@@ -884,9 +884,9 @@ static void check_stack_usage(void)
spin_lock(&low_water_lock); spin_lock(&low_water_lock);
if (free < lowest_to_date) { if (free < lowest_to_date) {
printk(KERN_WARNING "%s used greatest stack depth: %lu bytes " printk(KERN_WARNING "%s (%d) used greatest stack depth: "
"left\n", "%lu bytes left\n",
current->comm, free); current->comm, task_pid_nr(current), free);
lowest_to_date = free; lowest_to_date = free;
} }
spin_unlock(&low_water_lock); spin_unlock(&low_water_lock);
......
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