FreeBSD Developers' Handbook
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10.2 Lock Manager Locks

Locks that are provided via the lockmgr(9) interface are lock manager locks. These locks are reader-writer locks and may be held by a sleeping process.

Table 10-2. lockmgr(9) 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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