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SubjectRe: test10-pre1 problems on 4-way SuperServer8050
On Wed, 11 Oct 2000, Tigran Aivazian wrote:
> On Wed, 11 Oct 2000, Rik van Riel wrote:
> > Could you send me the backtrace of one of the cases where
> > you hit the bug ?
>
> here you are:

> Oct 11 16:05:26 hilbert36 kernel: kernel BUG at page_alloc.c:221!
> Oct 11 16:05:27 hilbert36 kernel: Call Trace: [tvecs+9181/112440] [tvecs+9707/112440] [__alloc_pages+225/740] [filemap_nopage+240/1120] [do_no_page+93/440] [<fcd9d025>] [<fcd9d025>]
> Oct 11 16:05:27 hilbert36 kernel: [<fcd9d025>] [<fcd9d025>] [<fcd9d025>] [handle_mm_fault+944/1388] [do_page_fault+0/1008] [unmap_fixup+99/316] [do_page_fault+323/1008] [do_page_fault+0/1008]
> Oct 11 16:05:27 hilbert36 kernel: [timer_bh+56/700] [bh_action+78/176] [tasklet_hi_action+81/124] [do_softirq+90/136] [do_IRQ+218/236] [error_code+52/60]

Ughhh, of course ... this comes into __alloc_pages(), which
finds a page with some flags set on the free list ... this
backtrace - of course - isn't helpful in debugging the thing,
sorry for wasting your time...

[off to find other ways of finding this problem ... note that
__free_pages_ok() does the SAME BUG() check before putting the
page on the free list]

regards,

Rik
--
"What you're running that piece of shit Gnome?!?!"
-- Miguel de Icaza, UKUUG 2000

http://www.conectiva.com/ http://www.surriel.com/

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