Author: pluknet Date: Fri Sep 26 04:33:27 2014 New Revision: 272153 URL: http://svnweb.freebsd.org/changeset/base/272153
Log: Fix description of mutex acquisition. Reviewed by: kib X-MFC with: r272070 Sponsored by: Nginx, Inc. Modified: head/lib/libthr/libthr.3 Modified: head/lib/libthr/libthr.3 ============================================================================== --- head/lib/libthr/libthr.3 Fri Sep 26 03:03:58 2014 (r272152) +++ head/lib/libthr/libthr.3 Fri Sep 26 04:33:27 2014 (r272153) @@ -29,7 +29,7 @@ .\" .\" $FreeBSD$ .\" -.Dd September 20, 2014 +.Dd September 26, 2014 .Dt LIBTHR 3 .Os .Sh NAME @@ -85,8 +85,14 @@ owning the lock. .Nm performs a contested mutex acquisition in three stages, each of which is more resource-consuming than the previous. +The first two stages are only applied for a mutex of +.Dv PTHREAD_MUTEX_ADAPTIVE_NP +type and +.Dv PTHREAD_PRIO_NONE +protocol (see +.Xr pthread_mutexattr 3 ) . .Pp -First, a spin loop +First, on SMP systems, a spin loop is performed, where the library attempts to acquire the lock by .Xr atomic 9 operations. _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
