Re: [PATCH 4/4] s390/cio: Remove cond_resched() calls

[Peter Oberparleiter]

On 27.07.2026 18:24, Heiko Carstens wrote:
> Since [1] cond_resched() is a no-op on s390. Remove all calls.
> 
> [1] commit 7dadeaa6e851 ("sched: Further restrict the preemption modes")
> 
> Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx>

Makes sense, also given that this use of cond_resched() was added
specifically for the non-preempt case:

To quote b207f5a8f9a6 ("s390/cio: Relax subchannel scan loop"):
    ...
    This processing can take a significant amount of time during which
    no other task can run on the same CPU (unless CONFIG_PREEMPT has
    been enabled).
    ...

Reviewed-by: Peter Oberparleiter <oberpar@xxxxxxxxxxxxx>

-- 
Peter Oberparleiter
Linux on IBM Z Development - IBM Germany R&D