On Tue, 11 Sep 2018 18:11:43 +0200, Takashi Iwai wrote: > > On Tue, 11 Sep 2018 18:09:44 +0200, > Jens Axboe wrote: > > > > On 9/11/18 10:03 AM, Takashi Iwai wrote: > > > Hi, > > > > > > I noticed that bfq doesn't appear in the I/O scheduler list on > > > 4.19-rc3. It seems that blkcg_policy_register() at the beginning of > > > bfq_init() returns -ENOSPC, hence the probe aborts silently. > > > > > > Is this already addressed? > > > > Haven't heard about this one before. What kernel did you last use that > > worked? > > IIRC, 4.18 worked fine. Let me see whether I have a backup... Confirmed that 4.18 worked. It's also with CONFIG_IOSCHED_BFQ=y and CONFIG_BFQ_GROUP_IOSCHED=y. And, 4.19-rc3 with CONFIG_BFQ_GROUP_IOSCHED=n seems working, too (as expected from the error above). (BTW I'll have to leave from this machine now. For any further inquiry, I'll check tomorrow, sorry.) Takashi
