From: Nikolay Borisov <nborisov@suse.com>
To: syzbot <syzbot+738cca7d7d9754493513@syzkaller.appspotmail.com>,
clm@fb.com, dsterba@suse.com, josef@toxicpanda.com,
linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com,
viro@zeniv.linux.org.uk
Subject: Re: INFO: task hung in vfs_setxattr (3)
Date: Tue, 15 Sep 2020 10:26:26 +0300 [thread overview]
Message-ID: <c268d760-2230-ec66-01d4-d3cd725ea522@suse.com> (raw)
In-Reply-To: <0000000000008a633505af53038f@google.com>
On 15.09.20 г. 7:59 ч., syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 7fe10096 Merge branch 'linus' of git://git.kernel.org/pub/..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=140b0853900000
> kernel config: https://syzkaller.appspot.com/x/.config?x=a9075b36a6ae26c9
> dashboard link: https://syzkaller.appspot.com/bug?extid=738cca7d7d9754493513
> compiler: gcc (GCC) 10.1.0-syz 20200507
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=108d45a5900000
>
> The issue was bisected to:
>
> commit 6a3c7f5c87854e948c3c234e5f5e745c7c553722
> Author: Nikolay Borisov <nborisov@suse.com>
> Date: Thu May 28 08:05:13 2020 +0000
>
> btrfs: don't balance btree inode pages from buffered write path
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14884d21900000
> final oops: https://syzkaller.appspot.com/x/report.txt?x=16884d21900000
> console output: https://syzkaller.appspot.com/x/log.txt?x=12884d21900000
Unlikely, that patch does change the performance characteristics because
now we don't balance metadata when doing buffered writes but I don't see
how it can lead to a hang.
next prev parent reply other threads:[~2020-09-15 7:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-15 4:59 INFO: task hung in vfs_setxattr (3) syzbot
2020-09-15 7:26 ` Nikolay Borisov [this message]
2020-09-15 7:57 ` David Sterba
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