Re: INFO: rcu detected stall in do_swap_page

[syzbot]

syzbot suspects this bug was fixed by commit:

commit 32aaf0553df99cc4314f6e9f43216cd83afc6c20
Author: Pengfei Li <lpf.vector@xxxxxxxxx>
Date:   Mon Sep 23 22:36:58 2019 +0000

    mm/compaction.c: remove unnecessary zone parameter in  
isolate_migratepages()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=159dcaaae00000
start commit:   c6dd78fc Merge branch 'x86-urgent-for-linus' of git://git...
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=3c8985c08e1f9727
dashboard link: https://syzkaller.appspot.com/bug?extid=2a89b1fb6539ff150c16
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1456f9d0600000

If the result looks correct, please mark the bug fixed by replying with:

#syz fix: mm/compaction.c: remove unnecessary zone parameter in  
isolate_migratepages()

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