Messages in this thread | | | From | Linus Torvalds <> | Date | Mon, 14 Feb 2011 07:26:13 -0800 | Subject | Re: Heads up Linux 2.6.38-rc4 compile problems. |
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On Sun, Feb 13, 2011 at 9:34 PM, Eric W. Biederman <ebiederm@xmission.com> wrote: > > And for completeness. When I was rebooting v2.6.38-rc4 to start running > 795abaf1e4e188c4171e3cd3dbb11a9fcacaf505 I hit this.
.. but this was while still running the older kernel, right?
> <2>kernel BUG at mm/filemap.c:125!
I suspect this is "normal" after page table corruption. Any page that was mapped but overwritten by the corruption would never get unmapped (since it can't be found in the page tables), and then you trigger the
BUG_ON(page_mapped(page));
in __remove_from_page_cache() at umount time. Your register state shows that %eax is 0, and that's the count that we tested ("page->_mapcount" is -1 when there are no mappings, so you have one lost mapping reference to that page).
So that oops isn't all that interesting, I'm afraid.
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