在 2020/8/12 下午7:45, Rasmus Villemoes 写道:
On 12/08/2020 12.50, zhantao.tang@xxxxxxxxxxxxx wrote:
From: Zhantao Tang <zhantao.tang@xxxxxxxxxxxxx>
In commit: 47b6de0b7f22 ("hrtimer: Add a missing bracket and hide `migration_base' on !SMP")
a inline function is_migration_base() is introduced. But
the logic of the hrtimer_grab_expiry_lock was changed.
This patch is to correct it.
Yup, same patch sent back in April, which also had a fixes tag for 5.2.
https://lore.kernel.org/lkml/20200428144026.5882-1-rasmus.villemoes@xxxxxxxxx/
It got picked up for 4.19-rt, dunno why it wasn't for 5.2-rt.
Yes， currently 5.2 rt kernel not fix the issue.
And I checked the 4.19 rt kernel, but did not find the implementation
of hrtimer_grab_expiry_lock().
It used hrtimer_wait_for_timer() and the logic is OK.
Thanks,
Zhantao
Rasmus
