kernel.3045 and MSI/e1000?

[Dave Jones]

On Sat, Apr 07, 2007 at 11:07:30AM -0700, Tom London wrote:
 > On 4/7/07, dragoran dragoran <drago01 at gmail.com> wrote:
 > >
 > > On 4/7/07, Tom London <selinux at gmail.com> wrote:
 > > >
 > > > * Wed Apr 04 2007 Dave Jones <davej at redhat.com >
 > > > - Disable PCI MSI and MMCONFIG by default (cebbert)
 > > >
 > > > And I now get
 > > > Apr  7 09:55:55  localhost kernel: assign_interrupt_mode Found MSI
 > > capability
 > > > Apr  7 09:55:56  localhost kernel: e1000: eth1: e1000_request_irq:
 > > > Unable to allocate MSI interrupt Error: -22
 > > > Apr  7 09:56:09  localhost kernel: e1000: eth1: e1000_request_irq:
 > > > Unable to allocate MSI interrupt Error: -22
 > >
 > > try booting with pci=msi
 > Yeah, this makes the messages 'go away'.  Thanks.
 > Not sure I understand the apparent confusion here.....

It's harmless, just noisy.
In the 'Unable to allocate' case, it'll fall back to allocating non-MSI interrupts.
For the majority of users, MSI will make absolutely no discernable difference.
The patch referenced in the changelog inverts the usual logic the
kernel uses (Enable MSI by default, and offer 'pci=nomsi') to
disable by default, and offer with pci=msi for the minority cases where it
may be necessary.

This was done because the MSI code is still evolving at a rate where breakage occurs
frequently, even when drivers aren't using it.

	Dave

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