linux-kernel - Re: Use of VM

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Message-ID: <8074b77d-d784-95ee-8d47-069827855876@suse.com>
Date:   Thu, 9 Apr 2020 08:37:48 +0200
From:   Jürgen Groß <jgross@...e.com>
To:     Christoph Hellwig <hch@....de>, Wei Liu <wl@....org>
Cc:     Bob Liu <bob.liu@...cle.com>,
        "Durrant, Paul" <pdurrant@...zon.com>,
        Konrad Wilk <konrad.wilk@...cle.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Subject: Re: Use of VM_IOREMAP in xenbus

Adjusting recipient list (dropping David, new mail addresses for Wei and
Paul).

On 09.04.20 08:18, Christoph Hellwig wrote:
> Hi Wei,
> 
> commit ccc9d90a9a8b5 ("xenbus_client: Extend interface to support
> multi-page ring") addes a use of vmap in what is now
> xenbus_map_ring_valloc_hvm, and uses the VM_IOREMAP flag that is
> only really intended for implementing ioremap.  Do you remember
> what the reason is that this flag was used?
> 

Juergen