On 2014/5/20 6:35, Luck, Tony wrote:
>> Another problem, maybe we should use get_jiffies_64() instead of jiffies
>> directly here OR we'll meet wraparound problems on 32bit system. But a
>> same problem is that the jiffies_lock is not safe in NMI context...
>
> To quote Winnie the Pooh - "Bother".
>
> Can someone think of a clever way to get a sane 64 bit jiffie value on
> 32-bit systems (even when we get an NMI in the middle of updating the
> 64-bit jiffie)?
Hi Tony & Steven,
I've sent a patch to solve this problem, please help to review, thanks.
http://lkml.org/lkml/2014/6/28/41
tracing: fix uptime overflow problem
Thanks,
XiuQi
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