Messages in this thread | | | Date | Tue, 27 Oct 2020 16:07:42 +0000 | From | Christoph Hellwig <> | Subject | Re: [PATCH RFC] blk-mq: Don't IPI requests on PREEMPT_RT |
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On Tue, Oct 27, 2020 at 11:11:02AM +0100, Sebastian Andrzej Siewior wrote: > Right. I found this David Runge's log:
True, ->bi_end_io instances can do a lot of things as long as they are hardirq safe.
And in the end the IPI case isn't the super fast path anyway, as it means we don't use a queue per CPU.
Is there a way to raise a softirq and preferably place it on a given CPU without our IPI dance? That should be a win-win situation for everyone.
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