Re: [PATCH] [broken?] Add MSI support to e1000

[Roland Dreier]

    Andi> There seems to be something wrong with the MSI code in the
    Andi> kernel.  I tried to add MSI support to the s2io driver on
    Andi> x86-64, but it just didn't work (/proc/interrupts still
    Andi> displayed IO-APIC mode). I haven't investigated in detail
    Andi> yet though.

Hmm... I've not tried MSI on x86-64 (although I have tried it on
Nocona running a 32-bit kernel).  I have successfully used both MSI
and MSI-X on i386 with my mthca (InfiniBand HCA) driver, although with
some occasional stability glitches, which may be connected to the
e1000 problem I'm seeing.  In any case, /proc/interrupts definitely
shows "PCI-MSI" mode with a non-zero number of interrupts delivered
with my patched e1000 driver.

 - Roland

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