Re: [PATCH] Revert "timers: Don't wake ktimersoftd on every tick"

[Sebastian Andrzej Siewior]

On 2017-05-26 19:16:07 [+0200], Anna-Maria Gleixner wrote:
> This reverts commit 032f93cae150a.
> 
> The problem is that the look ahead optimization from the tick timer
> interrupt context can race with the softirq thread expiring timer. As
> a consequence the temporary hlist heads which hold the to expire
> timers are overwritten and the timers which are already removed from
> the wheel bucket for expiry are now dangling w/o a list head.
> 
> That means those timers never get expired. If one of those timers is
> canceled the removal operation will result in a hlist corruption.
> 
> Signed-off-by: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>

Applied

Sebastian