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From: Richard Zidlicky <rz@linux-m68k.org>
To: Daniel Phillips <phillips@arcor.de>
Cc: Jens Axboe <axboe@suse.de>, Rik van Riel <riel@conectiva.com.br>,
	zippel@linux-m68k.org, linux-m68k@lists.linux-m68k.org,
	linux-kernel@vger.kernel.org
Subject: Re: 2.4 mm trouble [possible lru race]
Date: Wed, 2 Oct 2002 11:45:25 +0200	[thread overview]
Message-ID: <20021002114524.A237@linux-m68k.org> (raw)
In-Reply-To: <E17wRKZ-0005vf-00@starship>; from phillips@arcor.de on Tue, Oct 01, 2002 at 08:01:10PM +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

  parent reply	other threads:[~2002-10-02 10:07 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-01 14:20 Richard.Zidlicky
2002-10-01 15:12 ` Daniel Phillips
2002-10-01 15:29 ` Daniel Phillips
2002-10-01 16:56   ` Rik van Riel
2002-10-01 17:10     ` Daniel Phillips
2002-10-01 17:31       ` Jens Axboe
2002-10-01 18:01         ` Daniel Phillips
2002-10-01 18:04           ` Jens Axboe
2002-10-01 18:14             ` Daniel Phillips
2002-10-01 18:22               ` Rik van Riel
2002-10-02 12:07               ` Geert Uytterhoeven
2002-10-02  9:45           ` Richard Zidlicky [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-10-20 14:37 Richard Zidlicky
     [not found] <20020925122439.C198@linux-m68k.org>
     [not found] ` <Pine.LNX.4.44.0209281634240.338-100000@serv>
     [not found]   ` <20021001112229.A235@linux-m68k.org>
2002-10-01 10:26     ` Daniel Phillips

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