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SubjectRe: aha152x driver can lockup your machine
On Fri, 18 Dec 1998, Aaron J . Grier wrote:

> On Fri, Dec 11, 1998 at 04:01:39PM +0000, Alan Cox wrote:
> > Can you see if you can find exactly which kernel it died on (ie if 89 is
> > ok and 93 isnt then try 91, and so on (binary search)). That means we can
> > cut the possible causes down to the changes in one patch file.
>
> While we're bashing the aha152x driver, I figured I'd chime in with my
> complaints...
>
> The aha152x driver (in 130 at least) has got a horrible tendency to suck
> interrupts away from everything else when the machine is under high
> load. I was ripping from my CD-ROM (plextor 32x on an ncr53c875) to a

Not only 2.1.130 but 2.0.37-pre3, If i say load a pine mailbox off the
SCSI hdd, while playing an audio file it'll break up every nowand then or
quite severe depending on how hard the scsi bus is getting hit..

swap and the audio file i question are on a DMA mode 4 IDE bus.. and
theres no problem with thrasing the IDE disk while doing the same task.

I'ts not I/O thats missing.. it just hits the interrupts very hard..

I'm using an Adaptec AVA-1515 (ISA) SCSI2 whch uses the aha-152x drivers.
I didnt notice this so much with 2.0.35..

I am curious to what causes it, no major problem tho.. but if its a simple
fix then it could be worthwhile..

Regards, Jim.

_____________________________________________________________________________
__ name: james woodward (jim)
/ . _ _ email: jim@jim.southcom.com.au, jim@woodward.southcom.com.au
(_/ / / \/ ) www: http://jim.southcom.com.au, http://www.mailbag.ml.org
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