Date: Sat, 8 Jun 2013 18:16:42 +0000 (UTC) From: Sergey Kandaurov <pluknet@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r251546 - head/share/man/man9 Message-ID: <201306081816.r58IGg5O056974@svn.freebsd.org>
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Author: pluknet Date: Sat Jun 8 18:16:41 2013 New Revision: 251546 URL: http://svnweb.freebsd.org/changeset/base/251546 Log: Update locking scheme, mostly transition from sched_lock. Modified: head/share/man/man9/signal.9 Modified: head/share/man/man9/signal.9 ============================================================================== --- head/share/man/man9/signal.9 Sat Jun 8 18:13:42 2013 (r251545) +++ head/share/man/man9/signal.9 Sat Jun 8 18:16:41 2013 (r251546) @@ -26,7 +26,7 @@ .\" .\" $FreeBSD$ .\" -.Dd November 20, 2004 +.Dd June 8, 2013 .Dt SIGNAL 9 .Os .Sh NAME @@ -252,7 +252,7 @@ The function resets the signal set and signal stack of a process in preparation for an .Xr execve 2 . -The lock for +The process lock for .Fa p must be held before .Fn execsigs @@ -272,11 +272,9 @@ Stop signals are handled and cleared rig .Fn issignal unless the process is a member of an orphaned process group and the stop signal originated from a TTY. -The -.Va sched_lock -lock may be acquired and released, and if -.Va Giant -is held, it may be released and reacquired. +The process spin lock for +.Fa td->td_proc +may be acquired and released. The .Vt sigacts structure @@ -289,9 +287,6 @@ The process lock for must be acquired before calling .Fn issignal and may be released and reacquired during the call. -The lock for the parent of -.Fa td->td_proc -may also be acquired and released. Default signal actions are not taken for system processes and init. .Pp The @@ -342,7 +337,7 @@ after the kernel has been notified that which causes the flag .Dv PS_NEEDSIGCHK to be set). -The lock for process that owns +The process lock for process that owns .Va curthread must be held before .Fn postsig @@ -360,7 +355,7 @@ function causes the process that owns to exit with a return value of signal number .Fa sig . If required, the process will dump core. -The lock for the process that owns +The process lock for the process that owns .Fa td must be held before .Fn sigexit @@ -377,8 +372,8 @@ to be ignored by .Fa p . The process lock for .Fa p -is acquired and released by -.Fn siginit . +is acquired and released, as is the lock for sigacts structure +.Fa p->p_sigacts . The only process that .Fn siginit is ever called for @@ -390,13 +385,11 @@ The function flags that there are unmasked signals pending that .Fn ast should handle. -The lock for process +The process lock for process .Fa td->td_proc must be held before .Fn signotify -is called, and -.Va sched_lock -is acquired and released. +is called, and the thread lock is acquired and released. .Pp The .Fn trapsignal @@ -410,10 +403,9 @@ will deliver it directly; otherwise, will call .Xr psignal 9 to cause the signal to be delivered. -The -.Va sched_lock -lock is acquired and released, as is the lock for -.Fa td->td_proc . +The process lock for +.Fa td->td_proc +is acquired and released. The lock for the .Va p_sigacts field of
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