Re: [syzbot] [bcachefs?] INFO: task hung in bch2_copygc_stop

[syzbot]

syzbot has bisected this issue to:

commit f5095b9f85a1674a92d00e7ab466499a8ba49ce1
Author: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Date:   Tue Jan 2 00:42:37 2024 +0000

    bcachefs: dev_usage updated by new accounting

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1256e29f980000
start commit:   adfc3ded5c33 Merge tag 'for-6.12/io_uring-discard-20240913..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1156e29f980000
console output: https://syzkaller.appspot.com/x/log.txt?x=1656e29f980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6f94136b4da4e897
dashboard link: https://syzkaller.appspot.com/bug?extid=c6fd966ebbdea1e8ff08
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10936a8b980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10bdd7c7980000

Reported-by: syzbot+c6fd966ebbdea1e8ff08@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: f5095b9f85a1 ("bcachefs: dev_usage updated by new accounting")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection