From: Sasha Levin <levinsasha928@gmail.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Avi Kivity <avi@redhat.com>,
Rusty Russell <rusty@rustcorp.com.au>,
virtualization <virtualization@lists.linux-foundation.org>,
kvm@vger.kernel.org
Subject: Re: [PATCH 0/11] RFC: PCI using capabilitities
Date: Sun, 11 Dec 2011 14:48:43 +0200 [thread overview]
Message-ID: <1323607723.4063.5.camel@lappy> (raw)
In-Reply-To: <20111211123057.GD11504@redhat.com>
On Sun, 2011-12-11 at 14:30 +0200, Michael S. Tsirkin wrote:
> On Sun, Dec 11, 2011 at 12:03:52PM +0200, Sasha Levin wrote:
> > On Sun, 2011-12-11 at 11:05 +0200, Avi Kivity wrote:
> > > mmios are strictly ordered.
> > >
> > > Perhaps your printfs are reordered by buffering? Are they from
> > > different threads? Are you using coalesced mmio (which is still
> > > strictly ordered, if used correctly)?
> >
> > I print the queue_selector and queue_address in the printfs, even if
> > printfs were reordered they would be printing the data right, unlike
> > they do now. It's the data in the printfs that matters, not their order.
> >
> > Same vcpu thread with both accesses.
> >
> > Not using coalesced mmio.
>
> Not sure why this would matter, but is the BAR a prefetcheable one?
> Rusty's patch uses pci_iomap which maps a prefetcheable BAR
> as cacheable.
Wasn't defined as prefetchable, but I'm seeing same thing with or
without it.
--
Sasha.
next prev parent reply other threads:[~2011-12-11 12:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-08 10:22 [PATCH 0/11] RFC: PCI using capabilitities Rusty Russell
2011-12-08 10:30 ` [RFC 1/11] virtio: use u32, not bitmap for struct virtio_device's features Rusty Russell
2011-12-08 10:32 ` [PATCH 0/11] RFC: PCI using capabilitities Sasha Levin
2011-12-08 15:37 ` Sasha Levin
2011-12-09 6:17 ` Rusty Russell
2011-12-10 21:32 ` Sasha Levin
2011-12-11 9:05 ` Avi Kivity
2011-12-11 10:03 ` Sasha Levin
2011-12-11 12:30 ` Michael S. Tsirkin
2011-12-11 12:48 ` Sasha Levin [this message]
2011-12-11 12:47 ` Michael S. Tsirkin
2011-12-11 12:53 ` Sasha Levin
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