From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: automount hangs during boot somewhere in rcu_barrier.
Date: Mon, 4 Jun 2012 07:54:32 -0700 [thread overview]
Message-ID: <20120604145432.GA2490@linux.vnet.ibm.com> (raw)
In-Reply-To: <20120604100925.GC23670@redhat.com>
On Mon, Jun 04, 2012 at 01:09:25PM +0300, Gleb Natapov wrote:
> On Mon, Jun 04, 2012 at 10:48:03AM +0300, Gleb Natapov wrote:
> > On Sun, Jun 03, 2012 at 08:15:49PM -0700, Paul E. McKenney wrote:
> > > Hmmm... Could you please try disabling CONFIG_RCU_FAST_NO_HZ? If that
> > > makes the problem go away, I have some patches 3.6-targeted patches
> > > for you.
> > Will report back.
> >
> Do not see any problems with the option disabled.
OK, then you are probably being bitten by the same bug that was biting
Pascal and Heiko. Could you please apply the following series from -rcu?
bf7757c3 (Merge commit 'v3.4-rc6' into HEAD)
edc17350 (RCU_FAST_NO_HZ detection of callback adoption)
8e03a88e (Update RCU_FAST_NO_HZ tracing for lazy callbacks)
f2298c63 (Move RCU_FAST_NO_HZ per-CPU variables to rcu_dynticks structure)
05cc0fc9 (Precompute RCU_FAST_NO_HZ timer offsets)
477fca01 (Dump only the current CPU's buffers for idle-entry/exit warnings)
f29075fb (The rcu_needs_cpu() function is not a quiescent state)
Of these, 05cc0fc9 (Precompute RCU_FAST_NO_HZ timer offsets) is likely
to be the most relevant. The -rcu tree may be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
Please let me know if you have any trouble pulling this series.
Thanx, Paul
next prev parent reply other threads:[~2012-06-04 15:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-03 11:32 automount hangs during boot somewhere in rcu_barrier Gleb Natapov
2012-06-04 3:15 ` Paul E. McKenney
2012-06-04 7:48 ` Gleb Natapov
2012-06-04 10:09 ` Gleb Natapov
2012-06-04 14:54 ` Paul E. McKenney [this message]
2012-06-05 9:46 ` Gleb Natapov
2012-06-05 15:19 ` Paul E. McKenney
2012-06-05 18:27 ` Gleb Natapov
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=20120604145432.GA2490@linux.vnet.ibm.com \
--to=paulmck@linux.vnet.ibm.com \
--cc=gleb@redhat.com \
--cc=linux-kernel@vger.kernel.org \
/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).