On Thu, Nov 06, 2014 at 01:57:36PM -0800, David Rientjes wrote:
[..]
> You see that doing
>
> if (panic_on_warn) {
> panic_on_warn = 0;
> panic(...);
> }
>
> is racy, I hope. If two threads WARN() at the same time, then there's
> nothing preventing a double panic() because WARN() itself is not
> serialized against anything. So both the current comment and your
> suggested revision comment are bogus.
panic() is serialized on panic_lock. So I guess it is fine to hit WARN()
on multiple cpus. Do you see an issue there?
Thanks
Vivek
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