On Fri, Apr 23, 2010 at 2:34 PM, Richard Mawson <richard@xxxxxxxxxxxxxxxxxxx> wrote: > On Thu, Apr 22, 2010 at 09:23:10PM -0600, Robert Hancock wrote: >> Hmm, that seems like this line in drivers/ata/sata_sil24.c: >> >> /* Set max read request size to 4096. This slightly increases >> * write throughput for pci-e variants. >> */ >> pcie_set_readrq(pdev, 4096); >> >> Can you try commenting out or deleting that line and rebuilding, and see >> if things work better? That's not really a solution, but if it worked, >> it would indicate there's something about the system configuration with >> that converter card installed that explodes when trying to set the max >> read request size. In that case can you post the output of "lspci -vv" >> and the full dmesg boot log? > > Having put printk messages all over the driver, I see it currently locks up > during this readl call: > > /* Clear port RST */ > tmp = readl(port + PORT_CTRL_STAT); > > .. but as this is clearly later on from the previously mentioned stack, I'm > starting to suspect that this is failing in random places when talking across > this pci-pcie bridge. Do you agree that this sounds plausible? I suspect it's something like that - not sure what else could cause things to explode at that point.. > > I did attempt to get a crash dump, but failed to get any joy from using the > nmi watchdog to trigger the use of the debug kernel in this state. > > I will attempt using a different machine, hopefully tomorrow, but I have no > native pcie machines so can't eliminate the pci-pcie bridge being at fault. > > Thanks for your help. > > -- > Richard Mawson > Mawson IT Services > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (GNU/Linux) > > iEYEARECAAYFAkvSBGYACgkQEqu+mbnN8VKZTgCeMu3flpdyVdp7smp8qaaJPGIp > 8h8AnReBz04O1NVYqD16zLnYcnN9NNHZ > =bANg > -----END PGP SIGNATURE----- > > -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
