Dominic Fandrey wrote:
While ripping DVDs the irq14: ata0 eats ~95% of one of my cores. The channel is exclusive to the drive.
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behaviour has changed. This is an HP 6510b GR695EA#ABD, if anyone thinks it might be helpful, I can supply you with a dmesg and the output of pciconf -lv.

The problem remains with fresh sources:

  PID USERNAME   THR PRI NICE   SIZE    RES STATE  C   TIME    CPU COMMAND
   12 root         1 171 ki31     0K    16K RUN    0  22:04 97.85% idle: cpu0
   37 root         1 -64    -     0K    16K CPU1   1   2:35 96.00% irq14: ata0
   11 root         1 171 ki31     0K    16K RUN    1  19:32  6.40% idle: cpu1

The rip is done by k3b, so the drive is accessed through the cam interface.
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