Date: Tue, 14 Jul 2015 13:48:20 -0500
From: Alex Thorlton <athorlton@sgi.com>
To: andrew banman <abanman@sgi.com>
Cc: Or Gerlitz <gerlitz.or@gmail.com>,
        Linux Kernel <linux-kernel@vger.kernel.org>,
        Doug Ledford <dledford@redhat.com>, Sean Hefty <sean.hefty@intel.com>,
        Hal Rosenstock <hal.rosenstock@gmail.com>,
        Or Gerlitz <ogerlitz@mellanox.com>,
        "David S. Miller" <davem@davemloft.net>,
        Roland Dreier <roland@purestorage.com>,
        Matan Barak <matanb@mellanox.com>, Moni Shoua <monis@mellanox.com>,
        Jack Morgenstein <jackm@dev.mellanox.co.il>,
        Yishai Hadas <yishaih@mellanox.com>,
        Eran Ben Elisha <eranbe@mellanox.com>, Ira Weiny <ira.weiny@intel.com>,
        "linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
        athorlton@sgi.com
Subject: Re: [BUG] mellanox IB driver fails to load on large config
Message-ID: <20150714184820.GB58053@asylum.americas.sgi.com>
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On Tue, Jul 14, 2015 at 01:22:34PM -0500, andrew banman wrote:
> On Sat, Jul 11, 2015 at 11:20:19PM +0300, Or Gerlitz wrote:
> > On Fri, Jul 10, 2015 at 10:15 PM, andrew banman <abanman@sgi.com> wrote:
> > > I'm seeing a large number of allocation errors originating from the Mellanox IB
> > > driver when booting the 4.2-rc1 kernel on a 4096cpu 32TB memory system:
> > 
> > Just to make sure, mlx4 works fine on this small (...) system with 4.1
> > and 4.2-rc1 breaks, or 4.2-rc1 is the 1st time you're trying that
> > config?
> 
> I'll let Alex comment on that, he did some testing on that.

I started seeing this on a 4.1-rc8 kernel, so it's been around for a
little while.  It may have been around before 4.1-rc8, but I haven't run
any kernels older than that on the big machine for some time.

- Alex
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