* Use of VM_IOREMAP in xenbus
@ 2020-04-09 6:18 ` Christoph Hellwig
0 siblings, 0 replies; 6+ messages in thread
From: Christoph Hellwig @ 2020-04-09 6:18 UTC (permalink / raw)
To: Wei Liu
Cc: Bob Liu, Paul Durrant, Konrad Wilk, Boris Ostrovsky,
David Vrabel, Juergen Gross, Stefano Stabellini, xen-devel,
linux-kernel
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?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Use of VM_IOREMAP in xenbus
@ 2020-04-09 6:18 ` Christoph Hellwig
0 siblings, 0 replies; 6+ messages in thread
From: Christoph Hellwig @ 2020-04-09 6:18 UTC (permalink / raw)
To: Wei Liu
Cc: Juergen Gross, Stefano Stabellini, Konrad Wilk, linux-kernel,
Bob Liu, Paul Durrant, David Vrabel, xen-devel, Boris Ostrovsky
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?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Use of VM_IOREMAP in xenbus
2020-04-09 6:18 ` Christoph Hellwig
@ 2020-04-09 6:37 ` Jürgen Groß
-1 siblings, 0 replies; 6+ messages in thread
From: Jürgen Groß @ 2020-04-09 6:37 UTC (permalink / raw)
To: Christoph Hellwig, Wei Liu
Cc: Bob Liu, Durrant, Paul, Konrad Wilk, Boris Ostrovsky,
Stefano Stabellini, xen-devel, linux-kernel
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
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Use of VM_IOREMAP in xenbus
@ 2020-04-09 6:37 ` Jürgen Groß
0 siblings, 0 replies; 6+ messages in thread
From: Jürgen Groß @ 2020-04-09 6:37 UTC (permalink / raw)
To: Christoph Hellwig, Wei Liu
Cc: Stefano Stabellini, Konrad Wilk, Durrant, Paul, linux-kernel,
Bob Liu, xen-devel, Boris Ostrovsky
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
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Use of VM_IOREMAP in xenbus
2020-04-09 6:37 ` Jürgen Groß
@ 2020-04-09 14:28 ` Wei Liu
-1 siblings, 0 replies; 6+ messages in thread
From: Wei Liu @ 2020-04-09 14:28 UTC (permalink / raw)
To: Jürgen Groß
Cc: Christoph Hellwig, Wei Liu, Bob Liu, Durrant, Paul, Konrad Wilk,
Boris Ostrovsky, Stefano Stabellini, xen-devel, linux-kernel
Hi Christoph
On Thu, Apr 09, 2020 at 08:37:48AM +0200, Jürgen Groß wrote:
> 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?
> >
I don't remember the reason. I can that flag can be dropped per your
reasoning.
Wei.
>
> Juergen
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Use of VM_IOREMAP in xenbus
@ 2020-04-09 14:28 ` Wei Liu
0 siblings, 0 replies; 6+ messages in thread
From: Wei Liu @ 2020-04-09 14:28 UTC (permalink / raw)
To: Jürgen Groß
Cc: Stefano Stabellini, Wei Liu, Konrad Wilk, Durrant, Paul,
linux-kernel, Bob Liu, xen-devel, Boris Ostrovsky,
Christoph Hellwig
Hi Christoph
On Thu, Apr 09, 2020 at 08:37:48AM +0200, Jürgen Groß wrote:
> 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?
> >
I don't remember the reason. I can that flag can be dropped per your
reasoning.
Wei.
>
> Juergen
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-04-09 14:55 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-04-09 6:18 Use of VM_IOREMAP in xenbus Christoph Hellwig
2020-04-09 6:18 ` Christoph Hellwig
2020-04-09 6:37 ` Jürgen Groß
2020-04-09 6:37 ` Jürgen Groß
2020-04-09 14:28 ` Wei Liu
2020-04-09 14:28 ` Wei Liu
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