Linux-kernel mailing list archive 1999-23,: Re: Oops in 2.3.X, 2.2.X, and 2.0.3X with FENRIS and NCR53c875 SCSI Driver

# Re: Oops in 2.3.X, 2.2.X, and 2.0.3X with FENRIS and NCR53c875 SCSI Driver

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 10 Jun 1999 00:32:54 +0100 (BST)

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> Also shows up single processor (different machine, same chipset 53C875). =
> Looks like a possible SCSI Scipts error. FENRIS, unlike UNIX FS's will =
> talk to more than one disk or partition concurrently since a volume can =
> have multiple segments strip[ed across several drives. May be exposing =
> some timing condition with the way I am calling breada abd bread.

The raid code already does that kind of concurrency. Now the important clue
is probably

> More on this -- am also getting "..could not get a free page...". =

This indicates a memory allocation failed. That means its more likely someone
doesnt check a get_free_page/kmalloc return and continues blissfully into
oblivion mode.

Could be the driver fs or scsi layer. Are your other test setups producing
a "free page.." message too ? (ie the working ones)

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