Date: Sat, 11 Jun 2005 00:44:35 +0900 (JST) From: Hiroki Sato <hrs@FreeBSD.org> To: sparc64@FreeBSD.org Subject: Re: E4500 with 24GB RAM Message-ID: <20050611.004435.59726356.hrs@allbsd.org> In-Reply-To: <20050606132756.X16994@carver.gumbysoft.com> References: <429A7B4D.3080102@samsco.org> <20050607.015510.21897573.hrs@allbsd.org> <20050606132756.X16994@carver.gumbysoft.com>
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----Security_Multipart(Sat_Jun_11_00_44_35_2005_636)-- Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Doug White <dwhite@gumbysoft.com> wrote in <20050606132756.X16994@carver.gumbysoft.com>: 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 handle 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 buffers dw> for the IOMMU on >16GB systems. dw> 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. 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. Is there anyone interested in investigating? I can provide remote access (serial console available) to this box. -- | Hiroki SATO ----Security_Multipart(Sat_Jun_11_00_44_35_2005_636)-- Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQBCqbVjTyzT2CeTzy0RAn/QAJ4zjt/wMbetf7GbTCZjDOoDM7wBTACfQ9EQ E7gD/1tS9XbJtj54W7qZv+I= =ZlRK -----END PGP SIGNATURE----- ----Security_Multipart(Sat_Jun_11_00_44_35_2005_636)----
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