Messages in this thread | | | Date | Mon, 13 Dec 2021 11:05:29 -0800 | From | Davidlohr Bueso <> | Subject | Re: [PATCH] blk-mq: make synchronous hw_queue runs RT friendly |
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On Mon, 13 Dec 2021, Christoph Hellwig wrote: >But more importantly: why isn't migrate_disable/enable doing the right >thing for !PREEMPT_RT to avoid this mess?
Please see Peter's description of the situation in af449901b84.
While I'm not at all a fan of sprinkling migrate_disabling around code, I didn't want to add any overhead for the common case. If this, however, were not an issue (if most cases are async runs, for example) the ideal solution I think would be to just pin current to the hctx->cpumask.
Thanks, Davidlohr
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