Re: DVD burning still have problems

[Jens Axboe]

On Fri, Jan 28 2005, Kasper Sandberg wrote:
> On Mon, 2005-01-24 at 23:48 +0000, Alan Cox wrote:
> > On Llu, 2005-01-24 at 23:01, Kasper Sandberg wrote:
> > > > there are certainly chipset and CPU errata in this area.
> > > would this mean that i should not use cpu frequency scaling?
> > 
> > Worth an experiment but I'd be suprised if it was your fix. The more
> > data the better however 
> I disabled cpufreq in the kernel, acpi i still have in kernel.. when i
> booted i did acpi=off, and changed IO scheduler to anticipatory
> i just burned a DVD, and it works ;D pretty neat, im not sure what
> caused it. but im glad.. i still have the small change in scsi_ioctl.h,
> however nothing appears in dmesg.. gonna burn one more dvd in a little
> bit, if it doesent work, i will let you know, if you dont hear more
> about it, assume it works :DD
> 
> btw: the reason i changed to anticipatory from cfq is that i noticed
> that sometimes the speed dropped abit, and thought it might have
> something to do with it, and, with as it did not

That's interesting, a short io starvation could for sure cause it. I
would really appreciate if you could try one change at the time though,
right now it's not really clear if it's acpi or the io scheduler.

-- 
Jens Axboe

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