Re: bad page state in 3.13-rc4

[Dave Jones]

On Thu, Dec 19, 2013 at 02:53:52PM -0500, Benjamin LaHaise wrote:

 > is populated into the page tables).  The only place I can see things going 
 > off the rails is if the get_user_pages() call fails.  It's possible trinity 
 > could be arranging things so that the get_user_pages() call is failing 
 > somehow.  Also, if it were a double free of a page, we should at least get 
 > a VM_BUG() occuring when the page's count is 0.
 > 
 > Dave -- do you have CONFIG_DEBUG_VM on in your test rig?

Yes. Note the original trace in this thread was a VM_BUG_ON(atomic_read(&page->_count) <= 0);

Right after these crashes btw, the box locks up solid. So bad that traces don't
always make it over usb-serial. Annoying.

	Dave


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/