On Fri, Mar 30, 2007 at 12:03:47PM -0700, Mitch Williams wrote: > This patch fixes a kernel bug which is triggered when using the > irqbalance daemon with MSI-X hardware. > > Because both MSI-X interrupt messages and MSI-X table writes are posted, > it's possible for them to cross while in-flight. This results in > interrupts being received long after the kernel thinks they're disabled, > and in interrupts being sent to stale vectors after rebalancing. > > This patch performs a read flush after writes to the MSI-X table for > mask and unmask operations. Since the SMP affinity is set while > the interrupt is masked, and since it's unmasked immediately after, > no additional flushes are required in the various affinity setting > routines. > > This patch has been validated with (unreleased) network hardware which > uses MSI-X. > > Revised with input from Eric Biederman. > > Signed-off-by: Mitch Williams <[EMAIL PROTECTED]>
Sorry, but this isn't going to go into 2.6.20 any time soon as it doesn't fit the rules for the -stable tree. But I'll take an updated version for my pci tree to go to Linus after 2.6.21 is out. thanks, greg k-h - 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/
