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SubjectRe: 2.1.94 still locks up hard after a few minutes
Bevan Schroeder wrote:
> On Thu, 9 Apr 1998, Linus Torvalds wrote:
> > This bug is definitely due to the changes in device locking. The
> > machine doesn't actually really die, and the system works fine
> > _except_ that all IO to a certain controller will block forever

> I just got a hard lockup in 2.1.94 under minimal load (just X) which
> froze mouse, network, keyboard, etc... Nothing unusual going on at
> the time... Only happened once so far.

It's probably still the same problem. The problem is related to a lock
contention on block devices. For SCSI drivers anyway, whether the scsi
driver interrupt routine calls the scsi_done() function with interrupts
enabled or disabled and whether the driver uses a global cli(); for locking
in the queue routine will determine if the machine is dead, or just the disk
subsystem is dead.


Doug Ledford <>
Opinions expressed are my own, but
they should be everybody's.

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