Re: 2.4 mm trouble [possible lru race]

Richard Zidlicky (rz@linux-m68k.org)
Wed, 2 Oct 2002 11:45:25 +0200


On Tue, Oct 01, 2002 at 08:01:10PM +0200, Daniel Phillips wrote:

> Richard, before I go making a test patch for you (it's not completely
> straightforward) can you confirm that your bug comes back when you back
> the lru race patch out?

bad luck, the disappearance of the bug was rather accidental - I have
switched to a different swap partition in the meantime. So backing out
the changes doesn't make the bug reappear, restoring previous IDE
configuration does.

Very likely interrupt related trouble, somewhere a missing spinlock_irqsave
perhaps. The bug manifests itself so that pages from wrong procesess get
swapped in for some process, however I have also had the luck to crash the
kernel (no Oops) so it is not likely to be one of the TLB/cache problems.

What strikes me is that is always related to swap and I 've never got any
strange dmesg so far.

Richard
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