From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
syzbot <syzbot+d29d18215e477cfbfbdd@syzkaller.appspotmail.com>,
linux-kernel@vger.kernel.org, pmladek@suse.com,
sergey.senozhatsky@gmail.com, syzkaller-bugs@googlegroups.com,
Samuel Ortiz <sameo@linux.intel.com>,
"David S. Miller" <davem@davemloft.net>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: INFO: rcu detected stall in vprintk_emit
Date: Tue, 26 Jun 2018 13:22:08 +0900 [thread overview]
Message-ID: <20180626042208.GA31439@jagdpanzerIV> (raw)
In-Reply-To: <20180625225937.43aee76c@vmware.local.home>
On (06/25/18 22:59), Steven Rostedt wrote:
> > Or ratelimited error reporting and cond_resched()
> > [that would be option B]:
>
> I don't think this is a printk() issue per se, so I think Option B is
> the only option. You should not get stuck in an infinite loop if we run
> short on memory. Perhaps we could have an Option C which would exit
> this loop gracefully with some kind of error. But I haven't looked at
> the surrounding code to be sure if that is possible.
Agree. I like Option B - an endless loop is the root cause, at the same
time filling up logbuf with useless data is useless. Can't tell if Option C
is feasible, up to networking people.
-ss
next prev parent reply other threads:[~2018-06-26 4:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <000000000000720530056f7f9b63@google.com>
2018-06-26 1:49 ` INFO: rcu detected stall in vprintk_emit Sergey Senozhatsky
2018-06-26 2:59 ` Steven Rostedt
2018-06-26 4:22 ` Sergey Senozhatsky [this message]
2018-06-26 5:03 ` Dmitry Vyukov
2018-06-26 5:07 ` Sergey Senozhatsky
2018-06-26 4:56 ` Dmitry Vyukov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180626042208.GA31439@jagdpanzerIV \
--to=sergey.senozhatsky.work@gmail.com \
--cc=davem@davemloft.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-wireless@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pmladek@suse.com \
--cc=rostedt@goodmis.org \
--cc=sameo@linux.intel.com \
--cc=sergey.senozhatsky@gmail.com \
--cc=syzbot+d29d18215e477cfbfbdd@syzkaller.appspotmail.com \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).