From: Dave Jones <davej@redhat.com>
To: David Rientjes <rientjes@google.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>,
tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
akpm@linux-foundation.org, zhangyanfei@cn.fujitsu.com,
guz.fnst@cn.fujitsu.com, x86@kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] numa, mem-hotplug: Fix stack overflow in numa when seting kernel nodes to unhotpluggable.
Date: Thu, 23 Jan 2014 01:58:24 -0500 [thread overview]
Message-ID: <20140123065824.GA17684@redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1401222214290.8088@chino.kir.corp.google.com>
On Wed, Jan 22, 2014 at 10:15:51PM -0800, David Rientjes wrote:
> On Thu, 23 Jan 2014, Dave Jones wrote:
>
> > It's 10, because I had MAXSMP set.
> >
> > So, MAX_NUMNODES = 1 << 10
> >
> > And the bitmask is made of longs. 1024 of them.
> >
> > How does this work ?
> >
>
> It's 1024 bits.
ok, I got lost in the maze of macros.
128 bytes is a pretty small amount of stack though, so I'm just as confused
as to what the actual bug here is.
After trying the proposed fix, I got another oops in the early init code..
<trace>
nr_free_zone_pages
nr_free_pagecache_pages
build_all_zonelists
start_kernel
<rip> ffffffffbc164b1e next_zones_zonelist
<rsp> ffffffffbcc01f00
I'll poke at it more in the morning. Too sleepy.
Dave
next prev parent reply other threads:[~2014-01-23 14:41 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-23 5:49 [PATCH] numa, mem-hotplug: Fix stack overflow in numa when seting kernel nodes to unhotpluggable Tang Chen
2014-01-23 6:01 ` Dave Jones
2014-01-23 6:05 ` Andrew Morton
2014-01-23 6:06 ` David Rientjes
2014-01-23 6:13 ` Dave Jones
2014-01-23 6:15 ` David Rientjes
2014-01-23 6:58 ` Dave Jones [this message]
2014-01-23 22:31 ` Dave Jones
2014-01-27 7:29 ` Tang Chen
2014-01-27 14:52 ` Dave Jones
2014-01-23 6:36 ` Tang Chen
2014-01-28 0:32 ` David Rientjes
2014-01-28 1:01 ` Tang Chen
2014-01-28 2:55 ` Dave Jones
2014-01-28 3:14 ` Tang Chen
2014-01-28 3:24 ` Tang Chen
2014-01-28 3:55 ` Dave Jones
2014-01-28 4:47 ` Tang Chen
2014-01-28 4:47 ` Dave Jones
2014-01-28 5:17 ` Tang Chen
2014-01-28 6:53 ` Dave Jones
2014-01-28 5:31 ` Tang Chen
2014-01-28 7:10 ` Tang Chen
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