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Date: Wed, 23 May 2007 15:57:43 -0700
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: freebsd-current@freebsd.org
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Subject: kernel page fault with non-sleepable lock
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(hand transcribed)

kernel page fault with following non-sleepable locks held:
exclusive sleep mutex vm object (standard object) r=0 (0xffffff0313a437d0)
locked@/usr/src/sys/vm/vm_fault.c 898

db_warn_self_wrapper
witness_warn
trap
calltrap
_mtx_assert
vm_page_wakeup
vm_fault
trap_pfault

-- 
Steve