On 11/06/2014 05:07 PM, Vivek Goyal wrote:
> 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?
Oops -- didn't see this until just now.
Once again, Vivek beat me to the punch :) and much more succinctly than I will
ever be able to do. :)
P.
>
> Thanks
> Vivek
>
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