On Thu, 24 May 2007 22:19:09 -0600 [EMAIL PROTECTED] (Eric W. Biederman) wrote:
> Currently we blacklist known bad msi configurations which means we > keep getting MSI enabled on chipsets that either do not support MSI, > or MSI is implemented improperly. Since the normal IRQ routing > mechanism seems to works even when MSI does not, this is a bad default > and causes non-functioning systems for no good reason. > > So this patch inverts the sense of the MSI bus flag to only enable > MSI on known good systems. I am seeding that list with the set of > chipsets with an enabled hypertransport MSI mapping capability. Which > is as close as I can come to an generic MSI enable. So for actually > using MSI this patch is a regression, but for just having MSI enabled > in the kernel by default things should just work with this patch > applied. > > People can still enable MSI on a per bus level for testing by writing > to sysfs so discovering chipsets that actually work (assuming we are > using modular drivers) should be pretty straight forward. Yup. Do we have a feel for how much performace we're losing on those systems which _could_ do MSI, but which will end up defaulting to not using it? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/