Tejun, I have an SB600/RS690 here with SATA drives connected. I haven't been following this thread, but I can help test something if it would help. Thanks, -Andrew On Jan 24, 2008 7:21 PM, Tejun Heo <htejun@xxxxxxxxx> wrote: > Hello, Shane. Sorry about the delay. Got caught up in other stuff. > > Shane Huang wrote: > > Quoting Tejun: > >> Uh-oh, wait a bit. Nope. Until we figure out what the something > >> else > > is > >> and positively verify 64bit DMA works fine, the quirk stays in. > > > > Our HW engineer has confirmed that our SB600 SATA controller indeed > > has some MSI issue, and we do not have any workaround. > > > > The workaround "quirk_msi_intx_disable_bug" to SB700 SATA controller > > can NOT work to SB600 SATA controller in my debug, while disablement > > to RS690 MSI in kernel source can fix it. > > Hmmm... Okay. Is the SB600 SATA controller culprit or the north bridge > - RS690? If the former is the case, proper way to work around it is to > add AHCI_HFLAG_NO_MSI for SB600 AHCI. > > > As to the SB600 64 bit DMA capacity, do you have any methods to do > > further verification? I do NOT find any problem in my debug after I > > disabled RS690 MSI in kernel 2.6.24-rc7. > > The problem is that we didn't actually prove anything. In the tests > you've done, pci=nomsi didn't fix the problem but disable_all_msi quirk > did. pci=nomsi and disable_all_msi quirk are identical. Also, > Srihari's problem was not reproduced, so currently we can't say much > from the test results. Srihari, do you still have the system around? > > Thanks. > > -- > tejun - 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
