Hi Mark,
On Tue, Feb 03, 2009 at 10:25:27AM +0000, Mark McLoughlin wrote:
> Hi,
>
> Same guest, this time a kvmclock related oops.
>
> Cheers,
> Mark.
>
> kernel BUG at include/linux/mm.h:302!
static inline void get_page(struct page *page)
{
page = compound_head(page);
VM_BUG_ON(atomic_read(&page->_count) == 0);
atomic_inc(&page->_count);
}
> RIP [<ffffffff810bb332>] do_wp_page+0x324/0x6d8
>From do_wp_page (COW pagefault handler). So the page was freed (or
thats how do_wp_page perceives it) while expected not to be (probably
because the page is pinned by the read-only pte reference, by the time
do_wp_page starts).
> invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
The FC11 kernel has pvmmu on. It _could_ be a weird side effect of the
pvmmu slab bug (which only happens with DEBUG_PAGEALLOC). What were you
doing when this happened? Reproducible?
Or some other corruption that causes the crazy symptom.
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
