Re: bdrv_drained_begin deadlock with io-threads

[Kevin Wolf]

Am 02.04.2020 um 11:10 hat Dietmar Maurer geschrieben:
> > It seems to fix it, yes. Now I don't get any hangs any more. 
> 
> I just tested using your configuration, and a recent centos8 image
> running dd loop inside it:
> 
> # while dd if=/dev/urandom of=testfile.raw bs=1M count=100; do sync; done
> 
> With that, I am unable to trigger the bug.
> 
> Would you mind running the test using a Debian Buster image running 
> "stress-ng -d 5" inside?
> I (and to other people here) can trigger the bug quite reliable with that.
> 
> On Debian, you can easily install stress-ng using apt:
> 
> # apt update
> # apt install stress-ng
> 
> Seems stress-ng uses a different write pattern which can trigger the bug 
> more reliable.

I was going to, just give me some time...

Kevin