FreeBSD Architecture Handbook
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2.2 Shared Exclusive Locks

These locks provide basic reader-writer type functionality and may be held by a sleeping process. Currently they are backed by lockmgr(9).

Table 2-2. Shared Exclusive Lock List

Variable Name Protectees
allproc_lock allproc zombproc pidhashtbl proc.p_list proc.p_hash nextpid
proctree_lock proc.p_children proc.p_sibling
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