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Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation.
From: |
Ian Jackson |
Subject: |
Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation. |
Date: |
Tue, 26 Aug 2008 12:02:45 +0100 |
Gerd Hoffmann writes ("[Qemu-devel] [PATCH 1/2] xenner: add event channel
implementation."):
> The patch also adds a XenEvtOps struct with function pointers for the
> xc_evtchn_* family, which is used to switch between libxenctrl and the
> qemu implementation at runtime. By default libxenctrl is used.
I don't understand why it's necessary to switch between these two
modes at runtime. That adds a lot of extra boilerplate and
indirection code and probably has some tiny performance effect too.
Why not make it a compile-time option ?
Even if the xen qemu becomes nearly identical to upstream, version
skew issues with the hypervisor, dom0 kernel, and so on will mean that
there will have to be a separate qemu branch for xen just for release
management purposes and so on.
Ian.
- Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., (continued)
- Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., Gerd Hoffmann, 2008/08/22
- Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., Gerd Hoffmann, 2008/08/25
- Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., Anthony Liguori, 2008/08/25
- Re: [Xen-devel] Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., Keir Fraser, 2008/08/26
- Re: [Xen-devel] Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., Anthony Liguori, 2008/08/25
- Re: [Xen-devel] Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., Keir Fraser, 2008/08/26
- Re: [Xen-devel] Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., Gerd Hoffmann, 2008/08/26
- Re: [Xen-devel] Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., Keir Fraser, 2008/08/26
- Re: [Xen-devel] Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation., Daniel P. Berrange, 2008/08/26
[Qemu-devel] [PATCH 2/2] xenner: use evtchn function pointers in the backends., Gerd Hoffmann, 2008/08/22
Message not available
- Re: [Qemu-devel] [PATCH 1/2] xenner: add event channel implementation.,
Ian Jackson <=