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Date: Mon, 4 Feb 2013 08:18:29 -0800
From: Tejun Heo <tj@kernel.org>
To: "Marciniszyn, Mike" <mike.marciniszyn@intel.com>
Cc: "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
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        "axboe@kernel.dk" <axboe@kernel.dk>, infinipath <infinipath@intel.com>,
        "linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
        "roland@kernel.org" <roland@kernel.org>
Subject: Re: [PATCH 27/62] infiniband/ipath: convert to idr_alloc()
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Hello,

On Mon, Feb 04, 2013 at 04:15:52PM +0000, Marciniszyn, Mike wrote:
> I tried the branch you indicated in the initial patch cover.
> 
> When run with a qib driver, and ipoib ping of another system produces:
...
> Looks like this is tripping during the arp/neighbour path resolution:
> 
> void idr_preload(gfp_t gfp_mask)
> {
>     /*
>      * Consuming preload buffer from non-process context breaks preload
>      * allocation guarantee.  Disallow usage from those contexts.
>      */
>     WARN_ON_ONCE(in_interrupt()); <------------------------
> 
> Any ideas Roland?

Yeah, firewire had the same problem.  It needs to conditionalize
preload() if !__GFP_WAIT (no point anyway).  Will send update patches
soon.

Thanks.

-- 
tejun