Ubuntu
linux package

  1. Bug #620074
  2. Comment #21

Comment 21 for bug 620074

Revision history for this message
In , l.wandrebeck (l.wandrebeck-linux-kernel-bugs) wrote :

I've met the high I/O wait problem with 3ware cards on Centos 5.x.
This is related to pci_try_set_mwi. More information here:
https://bugzilla.redhat.com/show_bug.cgi?id=444759
Now Thomas seems to have found another source for the problem. Maybe mwi is adding on top of that (not every controller driver sets MWI - BIOS is supposed to do so, but I've met a couple of boards that do not).
HTH.