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Date: Fri, 29 Aug 2014 13:24:11 +0300
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Dexuan Cui <decui@microsoft.com>
Cc: KY Srinivasan <kys@microsoft.com>, Sitsofe Wheeler <sitsofe@gmail.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "devel@linuxdriverproject.org" <devel@linuxdriverproject.org>
Subject: Re: [PANIC, hyperv] BUG: unable to handle kernel paging request at
 ffff880077800004 (hv_ringbuffer_write)
Message-ID: <20140829102411.GE5071@mwanda>
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On Fri, Aug 29, 2014 at 10:16:32AM +0000, Dexuan Cui wrote:
> Hi Dan,
> 
> Section 4.11.3 of Hypervisor Top Level Functional Specification(available at
> http://blogs.msdn.com/b/virtual_pc_guy/archive/2014/02/17/updated-hypervisor-top-level-functional-specification.aspx)
> says HV_STATUS_INVALID_ALIGNMENT can also be returned for a hypercall if
> "the specified input or output parameter lists spans pages."
> 
> My understanding is: the input's memory range shouldn't cross a page
> boundary.

Ah.  That makes sense then.  Thanks.

regards,
dan carpenter