page fault in igb driver on 8.0-RC2
pyunyh at gmail.com
Wed Nov 11 22:25:54 UTC 2009
On Wed, Nov 11, 2009 at 02:19:21PM -0800, Jack Vogel wrote:
> On Wed, Nov 11, 2009 at 12:31 PM, Pyun YongHyeon <pyunyh at gmail.com> wrote:
> > On Tue, Nov 10, 2009 at 03:18:09PM -0500, Mike Tancsa wrote:
> > > At 02:20 PM 11/10/2009, Jack Vogel wrote:
> > > >This is a fix for this problem, please apply and test this.
> > >
> > > Hi,
> > > Thanks! Yes, I am able to use both ports of the NIC now and
> > > no panics yet. Prior to this patch, bringing up both ports resulted
> > > in a non functioning NIC and panic! Generating some UDP and tcp
> > > traffic through the box, all seems to be OK on first blush.
> > >
> > I think this is a separate issue. Jack's patch surely reduce the
> > number of chance of bus_dmamap_load_mbuf_sg(9) failure because it
> > removed unnecessary DMA alignment restriction but once it happen
> > you would get the same result. Note, original poster's machine is
> > amd64.
> > Ya, so maybe a more robust solution to that failure would be a good
> thing, but this is not the time for more elaborate code, having this small
> fix put in is low risk and the better failure response can come later.
> In fact, I have a number of places in the ixgbe driver where I'm pondering
> over what to do in failure mode anyway.
More information about the freebsd-current