Module name: src
Changes by: dlg@cvs.openbsd.org 2014/09/16 17:05:34

Modified files:
sys/kern : subr_pool.c

Log message:
disable taking the mutex to read pool stats.

some pool users (eg, mbufs and mbuf clusters) protect calls to pools
with their own locks that operate at high spl levels, rather than
pool_setipl() to have pools protect themselves.

this means pools mtx_enter doesnt necessarily prevent interrupts
that will use a pool, so we get code paths that try to mtx_enter
twice, which blows up.

reported by vlado at bsdbg dot net and matt bettinger
diagnosed by kettenis@