Date: Mon, 19 Mar 2018 03:04:19 +0000 (UTC) From: Eitan Adler <eadler@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r331158 - stable/11/sys/sys Message-ID: <201803190304.w2J34J8Z084739@repo.freebsd.org>
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Author: eadler Date: Mon Mar 19 03:04:19 2018 New Revision: 331158 URL: https://svnweb.freebsd.org/changeset/base/331158 Log: MFC r314052: Document what the different flags mean for locking. Modified: stable/11/sys/sys/bufobj.h Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/sys/bufobj.h ============================================================================== --- stable/11/sys/sys/bufobj.h Mon Mar 19 02:46:17 2018 (r331157) +++ stable/11/sys/sys/bufobj.h Mon Mar 19 03:04:19 2018 (r331158) @@ -90,6 +90,12 @@ struct buf_ops { #define BO_WRITE(bo, bp) ((bo)->bo_ops->bop_write((bp))) #define BO_BDFLUSH(bo, bp) ((bo)->bo_ops->bop_bdflush((bo), (bp))) +/* + * Locking notes: + * 'S' is sync_mtx + * 'v' is the vnode lock which embeds the bufobj. + * '-' Constant and unchanging after initialization. + */ struct bufobj { struct rwlock bo_lock; /* Lock which protects "i" things */ struct buf_ops *bo_ops; /* - Buffer operations */
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