From: Gerd Hoffmann <kraxel@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>,
virtualization@lists.linux-foundation.org,
habanero@linux.vnet.ibm.com, Shirley Ma <mashirle@us.ibm.com>,
Krishna Kumar2 <krkumar2@in.ibm.com>,
kvm@vger.kernel.org, steved@us.ibm.com,
Tom Lendacky <tahm@linux.vnet.ibm.com>,
borntraeger@de.ibm.com, avi@redhat.com,
bryanv@daemoninthecloset.org
Subject: Re: [PATCHv3] virtio-spec: 64 bit features, used/avail event, fixes
Date: Wed, 03 Aug 2011 18:15:33 +0200 [thread overview]
Message-ID: <4E397425.90808@redhat.com> (raw)
In-Reply-To: <20110803160518.GA16563@redhat.com>
Hi,
> E.g. with 32 bridges, and 32 devices behind each one,
> the available 64K space gets us only 64 bytes per device.
15 bridges (with io window enabled) max, the smallest io window you can
assign to a bridge is 4k, and you need some space for the devices on the
root bus ...
cheers,
Gerd
next prev parent reply other threads:[~2011-08-03 16:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-01 10:25 [PATCHv3] virtio-spec: 64 bit features, used/avail event, fixes Michael S. Tsirkin
2011-06-02 1:49 ` Rusty Russell
2011-08-03 16:05 ` Michael S. Tsirkin
2011-08-03 16:15 ` Gerd Hoffmann [this message]
2011-08-03 16:29 ` Michael S. Tsirkin
2011-08-03 16:39 ` Michael S. Tsirkin
2011-08-04 7:55 ` Gerd Hoffmann
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