Messages in this thread Patch in this message | | | Date | Wed, 08 May 2013 16:01:04 -0500 | From | athorlton@sgi ... | Subject | [patch 2/2] panic: add cpu/pid to warn_slowpath_common in WARNING printk()s |
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These patches fix up issues with interspersed output from multiple simultaneous calls to warn or dump_stack on multi-cpu systems. References: <20130508210102.898396979@asylum.americas.sgi.com> 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 <akpm@linux-foundation.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Vikram Mulukutla <markivx@codeaurora.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Tejun Heo <tj@kernel.org> Reviewed-by: Robin Holt <holt@sgi.com> Signed-off-by: Alex Thorlton <athorlton@sgi.com> --- 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);
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