Messages in this thread | | | From | Martijn Coenen <> | Date | Thu, 15 Aug 2019 21:08:36 +0200 | Subject | Re: [PATCH] RFC: loop: Avoid calling blk_mq_freeze_queue() when possible. |
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On Thu, Aug 15, 2019 at 6:34 PM Ming Lei <tom.leiming@gmail.com> wrote: > If nothing will change, why does the userspace bother to send > SET_STATUS?
We don't change transfer, but we do change the offset and sizelimit. In our specific case, we know there won't be any I/O from userspace at this point; so from that point of view the freeze wouldn't be necessary. But I'm not sure how we can make loop aware of that in a safe way. Ideally we'd just have a way of completely configuring a loop device before starting the block request queue, but that seems like a pretty big change.
Martijn
> > > Thanks, > Ming Lei
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