Re: 2.6.18-rc5-mm1

[Jeremy Fitzhardinge <jeremy@goop.org>]

Jeremy Fitzhardinge wrote:
> The NULL EIP is desc->handle_irq in do_IRQ():
>
>         asm volatile(
>             "       xchgl  %%ebx,%%esp      \n"
>             "       call   *%%edi           \n"
>             "       movl   %%ebx,%%esp      \n"
>             : "=a" (arg1), "=d" (arg2), "=c" (arg3), "=b" (ebx)
>             :  "0" (irq),   "1" (desc),  "2" (regs),  "3" (isp),
>                "D" (desc->handle_irq)
>             : "memory", "cc"
>         );
>
> In my case, the IRQ is 0xdb = 219, which is an MSI interrupt for 
> libata (the AHCI SATA controller, presumably).  The exception happens 
> just after the SATA driver has probed all the hard disks.
>
> So it seems to me that the suspects are 1) sata, or 2) MSI.  I'll try 
> turning off MSI to see if it helps.

Yes, that fixed it; with MSI disabled I can boot successfully.

: ezr:pts/0; cd hg/linux-2.6/patches/broken-out/
: ezr:pts/0; ls *msi* | wc -l
23

Hm, where to start...

    J

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