Date: Sun, 27 Dec 2020 01:01:32 GMT From: Jamie Gritton <jamie@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 43c273489523 - main - jail: Make comments on struct prison locking more precise Message-ID: <202012270101.0BR11Wle074591@gitrepo.freebsd.org>
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The branch main has been updated by jamie: URL: https://cgit.FreeBSD.org/src/commit/?id=43c273489523fa39232b499ac547720f45dfffcf commit 43c273489523fa39232b499ac547720f45dfffcf Author: Jamie Gritton <jamie@FreeBSD.org> AuthorDate: 2020-12-27 01:01:16 +0000 Commit: Jamie Gritton <jamie@FreeBSD.org> CommitDate: 2020-12-27 01:01:16 +0000 jail: Make comments on struct prison locking more precise --- sys/sys/jail.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/sys/sys/jail.h b/sys/sys/jail.h index 2a6ee07ecc47..b95406079ea1 100644 --- a/sys/sys/jail.h +++ b/sys/sys/jail.h @@ -150,15 +150,17 @@ struct prison_racct; * * Lock key: * (a) allprison_lock - * (p) locked by pr_mtx + * (m) locked by pr_mtx + * (p) locked by pr_mtx, and also at least shared allprison_lock required + * to update * (c) set only during creation before the structure is shared, no mutex * required to read */ struct prison { TAILQ_ENTRY(prison) pr_list; /* (a) all prisons */ int pr_id; /* (c) prison id */ - int pr_ref; /* (p) refcount */ - int pr_uref; /* (p) user (alive) refcount */ + int pr_ref; /* (m) refcount */ + int pr_uref; /* (m) user (alive) refcount */ unsigned pr_flags; /* (p) PR_* flags */ LIST_HEAD(, prison) pr_children; /* (a) list of child jails */ LIST_ENTRY(prison) pr_sibling; /* (a) next in parent's list */
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