From: Peter Zijlstra <peterz@infradead.org>
To: Hugh Dickins <hughd@google.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Rik van Riel <riel@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Nick Piggin <npiggin@kernel.dk>,
Andrea Arcangeli <aarcange@redhat.com>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [RFC] page-table walkers vs memory order
Date: Thu, 26 Jul 2012 10:11:39 +0200 [thread overview]
Message-ID: <1343290299.26034.84.camel@twins> (raw)
In-Reply-To: <alpine.LSU.2.00.1207251452160.2084@eggly.anvils>
On Wed, 2012-07-25 at 15:09 -0700, Hugh Dickins wrote:
> We find out after it hits us, and someone studies the disassembly -
> if we're lucky enough to crash near the origin of the problem.
This is a rather painful way.. see
https://lkml.org/lkml/2009/1/5/555
we were lucky there in that the lack of ACCESS_ONCE() caused an infinite
loop so we knew exactly where we got stuck.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Hugh Dickins <hughd@google.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Rik van Riel <riel@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Nick Piggin <npiggin@kernel.dk>,
Andrea Arcangeli <aarcange@redhat.com>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [RFC] page-table walkers vs memory order
Date: Thu, 26 Jul 2012 10:11:39 +0200 [thread overview]
Message-ID: <1343290299.26034.84.camel@twins> (raw)
In-Reply-To: <alpine.LSU.2.00.1207251452160.2084@eggly.anvils>
On Wed, 2012-07-25 at 15:09 -0700, Hugh Dickins wrote:
> We find out after it hits us, and someone studies the disassembly -
> if we're lucky enough to crash near the origin of the problem.
This is a rather painful way.. see
https://lkml.org/lkml/2009/1/5/555
we were lucky there in that the lack of ACCESS_ONCE() caused an infinite
loop so we knew exactly where we got stuck.
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next prev parent reply other threads:[~2012-07-26 8:11 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-23 17:34 [RFC] page-table walkers vs memory order Peter Zijlstra
2012-07-23 17:34 ` Peter Zijlstra
2012-07-23 19:27 ` Paul E. McKenney
2012-07-23 19:27 ` Paul E. McKenney
2012-07-24 21:51 ` Hugh Dickins
2012-07-24 21:51 ` Hugh Dickins
2012-07-25 17:56 ` Paul E. McKenney
2012-07-25 17:56 ` Paul E. McKenney
2012-07-25 20:26 ` Hugh Dickins
2012-07-25 20:26 ` Hugh Dickins
2012-07-25 21:12 ` Paul E. McKenney
2012-07-25 21:12 ` Paul E. McKenney
2012-07-25 22:09 ` Hugh Dickins
2012-07-25 22:09 ` Hugh Dickins
2012-07-25 22:37 ` Paul E. McKenney
2012-07-25 22:37 ` Paul E. McKenney
2012-07-26 8:11 ` Peter Zijlstra [this message]
2012-07-26 8:11 ` Peter Zijlstra
2012-07-30 19:21 ` Jamie Lokier
2012-07-30 19:21 ` Jamie Lokier
2012-07-30 20:28 ` Paul E. McKenney
2012-07-30 20:28 ` Paul E. McKenney
2012-07-26 20:39 ` Peter Zijlstra
2012-07-26 20:39 ` Peter Zijlstra
2012-07-27 19:22 ` Hugh Dickins
2012-07-27 19:22 ` Hugh Dickins
2012-07-27 19:39 ` Paul E. McKenney
2012-07-27 19:39 ` Paul E. McKenney
2012-08-04 14:37 ` Andrea Arcangeli
2012-08-04 14:37 ` Andrea Arcangeli
2012-08-04 22:02 ` Paul E. McKenney
2012-08-04 22:02 ` Paul E. McKenney
2012-08-04 22:47 ` Andrea Arcangeli
2012-08-04 22:47 ` Andrea Arcangeli
2012-08-04 22:59 ` Dr. David Alan Gilbert
2012-08-04 22:59 ` Dr. David Alan Gilbert
2012-08-04 23:11 ` Paul E. McKenney
2012-08-04 23:11 ` Paul E. McKenney
2012-08-05 0:10 ` Dr. David Alan Gilbert
2012-08-05 0:10 ` Dr. David Alan Gilbert
2012-08-04 23:06 ` Paul E. McKenney
2012-08-04 23:06 ` Paul E. McKenney
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