Messages in this thread | | | Subject | Re: MQ-BFQ crashing on battery mode | From | Massimo Burcheri <> | Date | Fri, 24 Aug 2018 08:29:16 +0200 |
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On Wed, 2018-08-22 at 11:42 -0600, Jens Axboe wrote: > Any chance you can try 4.18 at least?
Of course, I tried the kernel.org sources now, sys-kernel/vanilla-sources-4.18.3 on Gentoo. The issue is the same.
I wonder that nobody has noticed that issue that I can reproduce on many kernels since 4.13 or even older. Is it a rare combination with my bcache, luks or btrfs? Or hardware specific? Or scheduler specific, as even BFQ is not that well tested on btrfs like the default one.
> Schedulers are specific to the queuing infrastructure, so certain types > will only be available with MQ and certain types will only be available > on !MQ.
I noticed that. It's just a bit intransparent from the menuconfig, options don't mention if a scheduler is working on MQ or not, like CONFIG_IOSCHED_BFQ. There it's written in the description, while CONFIG_MQ_IOSCHED_KYBER has the note in the name. Actually MQ schedulers could depend on BLK_MQ to make it obvious.
Best regards, Massimo[unhandled content-type:application/pgp-signature] | |