These patches fix up issues with interspersed output from multiple simultaneous calls to warn or dump_stack on multi-cpu systems. References: <[email protected]> Content-Disposition: inline; filename=add-cpu-pid-warn.patch
This patch adds in the cpu/pid that called WARN() so that the stack traces can be matched up with the WARNING messages. Cc: Andrew Morton <[email protected]> Cc: Stephen Boyd <[email protected]> Cc: Vikram Mulukutla <[email protected]> Cc: Rusty Russell <[email protected]> Cc: Tejun Heo <[email protected]> Reviewed-by: Robin Holt <[email protected]> Signed-off-by: Alex Thorlton <[email protected]> --- kernel/panic.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- linux.orig/kernel/panic.c +++ linux/kernel/panic.c @@ -399,8 +399,9 @@ struct slowpath_args { static void warn_slowpath_common(const char *file, int line, void *caller, unsigned taint, struct slowpath_args *args) { - printk(KERN_WARNING "------------[ cut here ]------------\n"); - printk(KERN_WARNING "WARNING: at %s:%d %pS()\n", file, line, caller); + pr_warn("------------[ cut here ]------------\n"); + pr_warn("WARNING: CPU: %d PID: %d at %s:%d %pS()\n", ' + raw_smp_processor_id(), current->pid, file, line, caller); if (args) vprintk(args->fmt, args->args); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
