How do I turn off "preemption" (getting "TIMEOUT - WRITE_DMA")

Kris Kennaway kris at obsecurity.org
Wed Sep 29 07:14:16 PDT 2004


On Wed, Sep 29, 2004 at 03:07:06AM +0200, Emanuel Strobl wrote:
> Am Dienstag, 28. September 2004 18:36 schrieb Kris Kennaway:
> > On Tue, Sep 28, 2004 at 12:15:54PM -0400, bsdfsse wrote:
> > > I am getting "TIMEOUT - WRITE_DMA" messages on my ad2 and ad3
> > > hard-drives.  I never get them on ad0 or the CD drive.  I did some
> > > searching, and it sounds like I need to turn of "preemption" in the
> > > kernel.  I'm running 5.3-BETA4 on the computer.
> > >
> > > I am going to guess this is turned on for the beta-testing.
> > >
> > > Any ideas?  I just started running 5.x last night.  %-)
> >
> > Update to the latest beta, which has a fixed ata driver.
> > Kris
> 
> Right, but I'd also like to know how I can turn it off. Just for curiosity.

Don't include the PREEMPTION kernel config option (it's off by default).

Kris
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