Date: Wed, 11 Nov 2009 14:25:20 -0800 From: Pyun YongHyeon <pyunyh@gmail.com> To: Jack Vogel <jfvogel@gmail.com> Cc: jfv@freebsd.org, Mykola Dzham <freebsd@levsha.org.ua>, re <re@freebsd.org>, current@freebsd.org, Mike Tancsa <mike@sentex.net> Subject: Re: page fault in igb driver on 8.0-RC2 Message-ID: <20091111222520.GD15449@michelle.cdnetworks.com> In-Reply-To: <2a41acea0911111419v5ae5682cy12613e1bd9a9c325@mail.gmail.com> References: <200911092215.nA9MFeDP013898@lava.sentex.ca> <2a41acea0911091459w2b4fec5djd64d0324557b7da2@mail.gmail.com> <200911100021.nAA0LvMG014534@lava.sentex.ca> <2a41acea0911091633u2899b47ewb514b6276ba2cf62@mail.gmail.com> <200911100227.nAA2RtDY015177@lava.sentex.ca> <2a41acea0911101057q4f913e30m9319e52bbd254cfe@mail.gmail.com> <2a41acea0911101120o39fd695cpa325736d00b11587@mail.gmail.com> <200911102018.nAAKI3s7021614@lava.sentex.ca> <20091111203101.GC15449@michelle.cdnetworks.com> <2a41acea0911111419v5ae5682cy12613e1bd9a9c325@mail.gmail.com>
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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@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. > Agreed. :-) > In fact, I have a number of places in the ixgbe driver where I'm pondering > over what to do in failure mode anyway. > That's great! > Jack >
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