Re: [PATCH v6] x86/hpet: Reduce HPET counter read contention

2016-08-25 Thread Waiman Long
On 08/25/2016 02:50 PM, Dave Hansen wrote: On 08/12/2016 05:59 PM, Waiman Long wrote: + * The lock and the hpet value are stored together and can be read in a + * single atomic 64-bit read. It is explicitly assumed that arch_spinlock_t + * is 32 bits in size. This requirement forces us to give

Re: [PATCH v6] x86/hpet: Reduce HPET counter read contention

2016-08-25 Thread Dave Hansen
On 08/12/2016 05:59 PM, Waiman Long wrote: > + * The lock and the hpet value are stored together and can be read in a > + * single atomic 64-bit read. It is explicitly assumed that arch_spinlock_t > + * is 32 bits in size. This requirement forces us to give up all of the goodness of lockdep. Is th

Re: [PATCH v6] x86/hpet: Reduce HPET counter read contention

2016-08-15 Thread Waiman Long
On 08/12/2016 10:30 PM, kbuild test robot wrote: Hi Waiman, [auto build test ERROR on tip/auto-latest] [also build test ERROR on v4.8-rc1 next-20160812] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/

Re: [PATCH v6] x86/hpet: Reduce HPET counter read contention

2016-08-12 Thread kbuild test robot
Hi Waiman, [auto build test ERROR on tip/auto-latest] [also build test ERROR on v4.8-rc1 next-20160812] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Waiman-Long/x86-hpet-Reduce-HPET-counter-re