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Subjectata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
Hi,

I am experiencing a strange problem with 2.6.23.15-137.fc8 (Fedora 8)
kernel. Everything works fine, but if I provide the "nosmp" option to
the kernel, I get some (S)ATA errors and the system does not boot.

Here is a screenshot:
http://folk.uio.no/vegardno/DSCF2543.JPG

Handwritten summary:
scsi0 : ahci
scsi1 : ahci
ata1: SATA max UDMA/133 cmd 0xf884c100 ctl 0x00000000 bmdma 0x000...
ata2: SATA max UDMA/133 cmd 0xf884c180 ctl 0x00000000 bmdma 0x000...
ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata1.00: qc timeout (cmd 0xec)
ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata1: port is slow to respond, please be patient (Status 0x80)
ata1: COMRESET failed (errno=-16)
ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
...
I don't see the connection between (no-)smp and ata. Something with
interrupt routing/IPI, missing irq ack? Booting another !SMP kernel
works fine. The problem also exists in 2.6.24-rc2.


Kind regards,
Vegard Nossum


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