Re: v4.15 and I/O hang with BFQ

> Il giorno 30 gen 2018, alle ore 16:40, Paolo Valente > ha scritto: > > > >> Il giorno 30 gen 2018, alle ore 15:40, Ming Lei ha >> scritto: >> >> On Tue, Jan 30, 2018 at 03:30:28PM +0100, Oleksandr Natalenko wrote: >>> Hi. >>> >> ... >>> systemd-udevd-271 [000] 4.311033: bfq

Re: v4.15 and I/O hang with BFQ

> Il giorno 30 gen 2018, alle ore 15:40, Ming Lei ha > scritto: > > On Tue, Jan 30, 2018 at 03:30:28PM +0100, Oleksandr Natalenko wrote: >> Hi. >> > ... >> systemd-udevd-271 [000] 4.311033: bfq_insert_requests: insert >> rq->0 >> systemd-udevd-271 [000] ...1 4.311037: blk

Re: v4.15 and I/O hang with BFQ

On Tue, Jan 30, 2018 at 03:30:28PM +0100, Oleksandr Natalenko wrote: > Hi. > ... >systemd-udevd-271 [000] 4.311033: bfq_insert_requests: insert > rq->0 >systemd-udevd-271 [000] ...1 4.311037: blk_mq_do_dispatch_sched: > not get rq, 1 > cfdisk-408 [000]

Re: v4.15 and I/O hang with BFQ

Hi. 30.01.2018 09:19, Ming Lei wrote: Hi, We knew there is IO hang issue on BFQ over USB-storage wrt. blk-mq, and last time I found it is inside BFQ. You can try the debug patch in the following link[1] to see if it is same with the previous report[1][2]: [1] https://marc.info/?l=linux-block&m=

Re: v4.15 and I/O hang with BFQ

Hi, On Tue, Jan 30, 2018 at 09:05:26AM +0100, Oleksandr Natalenko wrote: > Hi, Paolo, Ivan, Ming et al. > > It looks like I've just encountered the issue Ivan has already described in > [1]. Since I'm able to reproduce it reliably in a VM, I'd like to draw more > attention to it. > > First, I'm

v4.15 and I/O hang with BFQ

Hi, Paolo, Ivan, Ming et al. It looks like I've just encountered the issue Ivan has already described in [1]. Since I'm able to reproduce it reliably in a VM, I'd like to draw more attention to it. First, I'm using v4.15 kernel with all pending BFQ fixes: === 2ad909a300c4 bfq-iosched: don't