Messages in this thread | | | Date | Sat, 28 Jun 2014 19:56:09 +0800 | From | Xie XiuQi <> | Subject | Re: [PATCH] time: Provide full featured jiffies_to_nsecs() function |
| |
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
| |