[dm-devel] dm-crypt: fix lost ioprio when queuing crypto bios from task with ioprio
Kent Overstreet
kent.overstreet at gmail.com
Sun Dec 18 22:54:06 UTC 2016
On Sat, Dec 17, 2016 at 10:58:00AM -0500, Mike Snitzer wrote:
> The time for 4.10 inclusion has passed. This needs to wait until 4.11.
>
> It also needs more review, testing and possible re-working. Each DM
> target shouldn't have to worry about these details (though I do grant
> that dm-crypt.c:clone_init call to bio_set_prio makes sense).
>
> A more generic solution is needed (likely in DM core).
>
> A while ago, Vivek floated a patch that spoke to the need for iocontext
> (for the purposes of cgroups):
> https://patchwork.kernel.org/patch/8485451/
>
> I don't consider your patch too dissimilar. But it just needs to be
> worked on during a development window. On to 4.11 ;)
Mike, this current patch is a pure bugfix, and you can't fault Eric for not
wanting to do work on dm-cache too when all he's trying to do is solve a
particular real world problem. He should be able to do that without having to
dive into dm-cache code too.
Furthermore, pretty much every filesystem has private ioctls and interfaces -
this is no different.
If you dm guys want to standardize something, that's awesome - and in hindsight,
it wouldn't have been a bad idea to CC you guys on the original patches. But
please keep in mind Eric's not a full time kernel developer, and don't crap on
his work just becausue he's not working on dm-cache too.
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