FYI, there is an obvious bug in cpusets in 2.6.15-rcX:
cpuset_excl_nodes_overlap() may sleep (as it takes semaphore), but is
called from atomic context - select_bad_process() under tasklist_lock.
BUG. Found by Denis Lunev.
the same actually applies to cpuset_zone_allowed() which is called e.g.
from __alloc_pages()->get_page_from_freelist() and doesn't check for
GPF_NOATOMIC anyhow...
Kirill
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