[libvirt] [PATCH V2 2/3] Add a file descriptor set to QEMU private domain struct
Eric Blake
eblake at redhat.com
Tue Feb 5 00:15:57 UTC 2013
On 02/01/2013 02:57 PM, Stefan Berger wrote:
> Add a file descriptor set to the QEMU private domain structure.
>
> Stefan Berger <stefanb at linux.vnet.ibm.com>
>
> ---
> src/qemu/qemu_domain.c | 9 ++++++++-
> src/qemu/qemu_domain.h | 3 +++
> 2 files changed, 11 insertions(+), 1 deletion(-)
I think I mentioned this in another thread, and know I mentioned in IRC,
but just for archival purposes:
This version is overkill; we don't need a bitmap, but can instead just
track a per-vm counter that we increment each time we allocate a new
fdset (which won't be often enough to worry about overflow). On
libvirtd reload, we can recompute the maximum in-use fdset, and set the
counter one greater. Qemu won't care if hotunplugging leaves
lower-valued fdsets unused, nor if we reuse an fdset across a libvirtd
restart that was previously abandoned prior to the libvirtd restart.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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