Messages in this thread | | | Date | Wed, 4 May 2005 13:09:54 +0200 | From | Mikael Pettersson <> | Subject | Re: 2.6.12-rc3: Bad page state at prep_new_page |
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Andrew Morton writes: > Mikael Pettersson <mikpe@user.it.uu.se> wrote: > > > > My trusty network server (440BX PentiumIII box serving NFS and News) > > just threw the following at me: > > > > Bad page state at prep_new_page (in process 'python', page c10984e0) > > flags:0x20021008 mapping:00000000 mapcount:0 count:0 > > Backtrace: > > [<c0137555>] bad_page+0x75/0xb0 > > [<c01378aa>] prep_new_page+0x2a/0x70 > > [<c0137e60>] buffered_rmqueue+0xc0/0x1c0 > > [<c01380f0>] __alloc_pages+0xc0/0x400 > > [<c01425a9>] do_anonymous_page+0x79/0x150 > > [<c0142870>] do_no_page+0x1f0/0x360 > > [<c0142c2d>] handle_mm_fault+0x13d/0x170 > > [<c0110c92>] do_page_fault+0x2a2/0x6bf > > [<c0111d12>] recalc_task_prio+0xc2/0x170 > > [<c026b49b>] schedule+0x31b/0x5c0 > > [<c01109f0>] do_page_fault+0x0/0x6bf > > [<c0102dbf>] error_code+0x4f/0x54 > > Trying to fix it up, but a reboot is needed > > > > It's running 2.6.12-rc3 since last Friday, but had been running > > 2.6.12-rc2 for weeks before that w/o problems. 2.4 kernels and > > most recent 2.6 kernels have always been rock solid on it. > > > > PG_swapcache is set. It wasn't set when this page was returned to the page > allocator. > > > This is the first time this box has had a problem like this. > > While I can't rule out bad memory (I'll memtest86 it when I > > get a chance to), I'm inclined to suspect a 2.6 kernel bug. > > Could be a bug, but it'd be a damn unusual one. I wouldn't rule out a > bitflip.
Confirmed, it was a HW issue. Please disregard the original problem report.
(A recent upgrade led to a combination of front side bus speed setting and number of unregistered memory modules that the chipset couldn't quite handle. Darn, I would have preferred it to have been a bad SIMM.)
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