IDE "lost interrupt" on SMP

IDE "lost interrupt" on SMP

[Paul Flinders]

I decided to replace the Celerons on my Asus P2B-D with something
a little faster so I bought a new 1Ghz PIII** (it would have been two but
the local dealer only had one in stock).

However I can't boot any SMP configured kernel. It gets as far as
the partition check and then starts printing "hd<x>: lost interrupt"
after than it proceeds _very_ slowly to print the partitions and
then grinds to a halt as it tries to mount the root fs (I suspect that
it hasn't actually crashed but that disk I/O is proceeding extremely
slowly).

Configuring the kernel for single processor works and boots OK
- this is true for all the kernels (2.2.x and 2.4.x including 2.4.7)
that I've tried.

I thought that SMP kernels were OK with just one processor. Do
I need to add the second one or could there be something else
wrong.

** Actually underclocked at 750Mhz as the BX chipset only goes to
100 Mhz FSB

Re: IDE "lost interrupt" on SMP

[Zdenek Kabelac]

Paul Flinders wrote:
> However I can't boot any SMP configured kernel. It gets as far as
> the partition check and then starts printing "hd<x>: lost interrupt"
> after than it proceeds _very_ slowly to print the partitions and
> then grinds to a halt as it tries to mount the root fs (I suspect that
> it hasn't actually crashed but that disk I/O is proceeding extremely
> slowly).
> 
> Configuring the kernel for single processor works and boots OK
> - this is true for all the kernels (2.2.x and 2.4.x including 2.4.7)
> that I've tried.

I've been reporting this problem for years 
(since day I've bought SMP board with two Celeron)

However noone seems to care - so you simply can't use SMP kernel
for monoprocessor system - unless Andre Hedric will consider this
is serious problem  (simple test - boot SMP kernel on SMP
computer with cpu=1 or nosmp parameter)

bye

kabi