Messages in this thread | | | From | Song Liu <> | Date | Tue, 16 Nov 2021 23:35:33 -0800 | Subject | Re: [PATCH] md/raid5: play nice with PREEMPT_RT |
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On Mon, Nov 15, 2021 at 5:23 PM Davidlohr Bueso <dave@stgolabs.net> wrote: > > raid_run_ops() relies on the implicitly disabled preemption for > its percpu ops, although this is really about CPU locality. This > breaks RT semantics as it can take regular (and thus sleeping) > spinlocks, such as stripe_lock. > > Add a local_lock such that non-RT does not change and continues > to be just map to preempt_disable/enable, but makes RT happy as > the region will use a per-CPU spinlock and thus be preemptible > and still guarantee CPU locality. > > Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Applied to md-next.
Thanks, Song
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