From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Andrew Morton <akpm@linux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrea Arcangeli <aarcange@redhat.com>,
linux-mm@kvack.org,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Marcelo Tosatti <mtosatti@redhat.com>,
Adam Litke <agl@us.ibm.com>, Avi Kivity <avi@redhat.com>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Rik van Riel <riel@redhat.com>, Mel Gorman <mel@csn.ul.ie>,
Dave Hansen <dave@linux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Ingo Molnar <mingo@elte.hu>, Mike Travis <travis@sgi.com>,
Christoph Lameter <cl@linux-foundation.org>,
Chris Wright <chrisw@sous-sol.org>,
bpicco@redhat.com,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
Chris Mason <chris.mason@oracle.com>,
Borislav Petkov <bp@alien8.de>,
Miklos Szeredi <miklos@szeredi.hu>
Subject: Re: linux-next early user mode crash (Was: Re: Transparent Hugepage Support #33)
Date: Thu, 16 Dec 2010 07:11:22 -0800 [thread overview]
Message-ID: <20101216151122.GA2203@linux.vnet.ibm.com> (raw)
In-Reply-To: <20101216180047.4bb69b80.sfr@canb.auug.org.au>
On Thu, Dec 16, 2010 at 06:00:47PM +1100, Stephen Rothwell wrote:
> Hi Paul,
>
> On Thu, 16 Dec 2010 17:08:14 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> >
> > On Wed, 15 Dec 2010 21:29:58 -0800 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> wrote:
> > >
> > > RCU problems would normally take longer to run the system out of memory,
> > > but who knows?
> > >
> > > I did a push into -rcu in the suspect time frame, so have pulled it. I am
> > > sure that kernel.org will push this change to its mirrors at some point.
> > > Just in case tree-by-tree bisecting is faster than commit-by-commit
> > > bisecting.
> >
> > I have bisected it down to the rcu tree, so the three commits that were
> > added yesterday are the suspects. I am still bisecting. If will just
> > revert those three commits from linux-next today in the hope that Andrew
> > will end up with a working tree.
>
> Bisect finished:
>
> 4e40200dab0e673b019979b5b8f5e5d1b25885c2 is first bad commit
> commit 4e40200dab0e673b019979b5b8f5e5d1b25885c2
> Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> Date: Fri Dec 10 15:02:47 2010 -0800
>
> rcu: fine-tune grace-period begin/end checks
>
> Use the CPU's bit in rnp->qsmask to determine whether or not the CPU
> should try to report a quiescent state. Handle overflow in the check
> for rdp->gpnum having fallen behind.
>
> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
>
> So far 4 of my 6 boot tests that failed yesterday have succeeded today
> (with those last three rcu commits reverted) - the others are still
> building.
So I blew it not once, but twice -- once in the patch itself, and once
in messing up my -next process. :-/
Please accept my apologies!!!
Thanx, Paul
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next prev parent reply other threads:[~2010-12-16 15:15 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-15 5:15 Transparent Hugepage Support #33 Andrea Arcangeli
2010-12-15 23:55 ` Andrew Morton
2010-12-16 2:35 ` kvm mmu transparent hugepage support for linux-next Andrea Arcangeli
2010-12-16 0:54 ` Transparent Hugepage Support #33 KAMEZAWA Hiroyuki
2010-12-16 1:10 ` Daisuke Nishimura
2010-12-16 2:13 ` Andrea Arcangeli
2010-12-16 1:18 ` Andrew Morton
2010-12-16 2:02 ` linux-next early user mode crash (Was: Re: Transparent Hugepage Support #33) Stephen Rothwell
2010-12-16 5:29 ` Paul E. McKenney
2010-12-16 6:08 ` Stephen Rothwell
2010-12-16 7:00 ` Stephen Rothwell
2010-12-16 15:11 ` Paul E. McKenney [this message]
2010-12-20 11:16 ` Transparent Hugepage Support #33 Mel Gorman
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