Messages in this thread | | | Date | Mon, 25 Dec 2000 04:26:31 +0200 (IST) | From | Dan Aloni <> | Subject | Re: innd mmap bug in 2.4.0-test12 |
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On 25 Dec 2000, Zlatko Calusic wrote:
> Linus Torvalds <torvalds@transmeta.com> writes: > > > On Sun, 24 Dec 2000, Linus Torvalds wrote: > > > > > > Marco, would you mind changing the test in reclaim_page(), somewheer > > > around line mm/vmscan.c:487 that says: > > > > Speaking of page_launder() I just stumbled upon two oopsen today on > the UP build. Maybe it could give a hint to someone, I'm not that good > at Oops decoding. > > Unable to handle kernel NULL pointer dereference at virtual address 0000000c > printing eip: > c012872e > *pde = 00000000 > Oops: 0000 > CPU: 0 > EIP: 0010:[page_launder+510/2156]
I suspected I'm not the only one who is getting these exact same Oopses (and the lockups that follow them) so earlier today, I've decoded the Oops I got, and found that the problem is in vmscan.c:line-605, where page->mapping is NULL and a_ops gets resolved and dereferenced at 0x0000000c.
I leave the fix for the mm experts, I've notified Linus, I guess he's looking into it.
-- Dan Aloni dax@karrde.org
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