* Mike Galbraith | 2014-05-06 07:33:51 [+0200]:
>> Hmm, do all archs check? Perhaps we need to also update
>> include/asm-generic/preempt.h?
>
>Per cpu preempt_count is x86, and tif_need_resched() handles laziness,
>so all should be well. Did I just manage to overlook the obvious for
>the second time?
In include/asm-generic/preempt.h we have
| static __always_inline bool __preempt_count_dec_and_test(void)
| {
| return !--*preempt_count_ptr() && tif_need_resched();
| }
and tif_need_resched() is in include/linux/thread_info.h
| #ifdef CONFIG_PREEMPT_LAZY
| #define tif_need_resched() (test_thread_flag(TIF_NEED_RESCHED) || \
| test_thread_flag(TIF_NEED_RESCHED_LAZY))
| #else
| #define tif_need_resched() (test_thread_flag(TIF_NEED_RESCHED))
| #endif
So I guess we are fine.
>-Mike
Sebastian
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
