From: Dave Jones <davej@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: a whole bunch of crashes since todays -mm merge.
Date: Thu, 7 Jun 2012 21:12:15 -0400 [thread overview]
Message-ID: <20120608011215.GB7191@redhat.com> (raw)
In-Reply-To: <CA+55aFxwVWiVwxj39DoJmMTknh7JKvCxzxyu-cMQZwd53jOmgQ@mail.gmail.com>
On Thu, Jun 07, 2012 at 06:06:27PM -0700, Linus Torvalds wrote:
> On Thu, Jun 7, 2012 at 6:00 PM, Dave Jones <davej@redhat.com> wrote:
> >
> > Or I might just be getting lucky..
>
> Do you have SPLIT_RSS_COUNTING enabled?
I don't think so ? I have CONFIG_SPLIT_PTLOCK_CPUS=999999,
so it looks like that never gets defined unless I'm missing something obvious.
> Do you see multiple "BUG: Bad rss-counter state" messages?
no
> The sync_mm_rss() thing could basically overwrite an already-free'd
> piece of memory, so it could cause pretty random stuff. But I think
> you need to be unlucky to hit the window.
the 8169 debug stuff I was trying to run used the function tracer. Could that have
widened the window ?
Dave
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WARNING: multiple messages have this Message-ID (diff)
From: Dave Jones <davej@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: a whole bunch of crashes since todays -mm merge.
Date: Thu, 7 Jun 2012 21:12:15 -0400 [thread overview]
Message-ID: <20120608011215.GB7191@redhat.com> (raw)
In-Reply-To: <CA+55aFxwVWiVwxj39DoJmMTknh7JKvCxzxyu-cMQZwd53jOmgQ@mail.gmail.com>
On Thu, Jun 07, 2012 at 06:06:27PM -0700, Linus Torvalds wrote:
> On Thu, Jun 7, 2012 at 6:00 PM, Dave Jones <davej@redhat.com> wrote:
> >
> > Or I might just be getting lucky..
>
> Do you have SPLIT_RSS_COUNTING enabled?
I don't think so ? I have CONFIG_SPLIT_PTLOCK_CPUS=999999,
so it looks like that never gets defined unless I'm missing something obvious.
> Do you see multiple "BUG: Bad rss-counter state" messages?
no
> The sync_mm_rss() thing could basically overwrite an already-free'd
> piece of memory, so it could cause pretty random stuff. But I think
> you need to be unlucky to hit the window.
the 8169 debug stuff I was trying to run used the function tracer. Could that have
widened the window ?
Dave
next prev parent reply other threads:[~2012-06-08 1:12 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-08 0:24 a whole bunch of crashes since todays -mm merge Dave Jones
2012-06-08 0:24 ` Dave Jones
2012-06-08 0:52 ` Linus Torvalds
2012-06-08 0:52 ` Linus Torvalds
2012-06-08 1:00 ` Dave Jones
2012-06-08 1:00 ` Dave Jones
2012-06-08 1:06 ` Linus Torvalds
2012-06-08 1:06 ` Linus Torvalds
2012-06-08 1:12 ` Dave Jones [this message]
2012-06-08 1:12 ` Dave Jones
2012-06-08 1:25 ` Linus Torvalds
2012-06-08 1:25 ` Linus Torvalds
2012-06-08 1:05 ` Andrew Morton
2012-06-08 1:05 ` Andrew Morton
2012-06-08 1:09 ` Linus Torvalds
2012-06-08 1:09 ` Linus Torvalds
2012-06-08 2:22 ` Dave Jones
2012-06-08 2:22 ` Dave Jones
2012-06-08 1:39 ` Stephen Rothwell
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