Date: Fri, 10 Jun 2005 17:12:39 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Hiroki Sato <hrs@FreeBSD.org> Cc: sparc64@FreeBSD.org Subject: Re: E4500 with 24GB RAM Message-ID: <20050610211239.GA59402@xor.obsecurity.org> In-Reply-To: <20050611.004435.59726356.hrs@allbsd.org> References: <429A7B4D.3080102@samsco.org> <20050607.015510.21897573.hrs@allbsd.org> <20050606132756.X16994@carver.gumbysoft.com> <20050611.004435.59726356.hrs@allbsd.org>
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--M9NhX3UHpAaciwkO Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jun 11, 2005 at 12:44:35AM +0900, Hiroki Sato wrote: > Doug White <dwhite@gumbysoft.com> wrote > in <20050606132756.X16994@carver.gumbysoft.com>: >=20 > dw> Since the panic is in a KASSERT thats why it only pops up under > dw> INVARIANTS. However the bus_dma tags specify that hme can only handl= e 32 > dw> bit addresses so it should be using a bounce buffer. I'm guessing that > dw> bus_dma needs to be taught about this limitation and use bounce buffe= rs > dw> for the IOMMU on >16GB systems. > dw>=20 > dw> Someone should also research this value a bit more ... I wonder if its > dw> from some older system (E450?), and newer machines have larger limits= . I > dw> would hope they'd build E4500s with IOMMUs that can address all of > dw> physical memory. >=20 > Hmmm, I notice the box sometimes hangs up with <16GB RAM under > moderate network load just after "hme0: invalid packet size > xxxx; dropping" is displayed. I tried 16, 12, 8, and 4GB. > Another E4500 with 5GB RAM seems OK, though. I wonder if it's disk related. I tried to check out a ports tree on this machine and it hung in a few seconds (although this was also checking out using the network via nfs). Kris > Is there anyone interested in investigating? I can provide remote > access (serial console available) to this box. >=20 > --=20 > | Hiroki SATO --M9NhX3UHpAaciwkO Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCqgJFWry0BWjoQKURAhTTAJ0ZDxuuZyvZinb/2/Q+xnR/zbuYPwCeJ2zb 9Vn7H0BhuWNChOE0+L9FrXA= =919b -----END PGP SIGNATURE----- --M9NhX3UHpAaciwkO--
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