UMA zone alloc on large UMA zone causing Page fault in kernel mode

[Jonathan Stuart]

Hiya all,

Does anyone have any idea why a large UMA zone created without the UMA_ZONE_PAGEABLE flag would page fault in kernel mode when I uma_zalloc one item with M_ZERO | M_WAITOK.  The fault takes place during the bzero'ing of
the memory.. the pointer *looks* valid, as well.  This does not happen with some smaller zones I've been using.
The zone shows up in ddb's "show uma", and it's size 620756992.

Do I need to use UMA_ZONE_NOFREE to keep it in memory?  This was not my understanding of that flag.

Thanks for any/all help, if code or ddb output would be preferable please let me know.

Kind Regards,
Jonathan Stuart