From owner-cvs-src-old@FreeBSD.ORG Tue Feb 8 00:17:10 2011 Return-Path: Delivered-To: cvs-src-old@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 089BA106564A for ; Tue, 8 Feb 2011 00:17:10 +0000 (UTC) (envelope-from mdf@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [IPv6:2001:4f8:fff6::29]) by mx1.freebsd.org (Postfix) with ESMTP id CC8C18FC08 for ; Tue, 8 Feb 2011 00:17:09 +0000 (UTC) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.14.4/8.14.4) with ESMTP id p180H9oB081335 for ; Tue, 8 Feb 2011 00:17:09 GMT (envelope-from mdf@repoman.freebsd.org) Received: (from svn2cvs@localhost) by repoman.freebsd.org (8.14.4/8.14.4/Submit) id p180H9bc081334 for cvs-src-old@freebsd.org; Tue, 8 Feb 2011 00:17:09 GMT (envelope-from mdf@repoman.freebsd.org) Message-Id: <201102080017.p180H9bc081334@repoman.freebsd.org> X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to mdf@repoman.freebsd.org using -f From: Matthew D Fleming Date: Tue, 8 Feb 2011 00:16:36 +0000 (UTC) To: cvs-src-old@freebsd.org X-FreeBSD-CVS-Branch: HEAD Subject: cvs commit: src/sys/dev/sio sio.c src/sys/kern kern_synch.c kern_sysctl.c subr_uio.c vfs_bio.c vfs_mount.c vfs_subr.c vfs_vnops.c src/sys/pc98/cbus sio.c src/sys/sys proc.h uio.h src/sys/ufs/ffs ffs_softdep.c X-BeenThere: cvs-src-old@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: **OBSOLETE** CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Feb 2011 00:17:10 -0000 mdf 2011-02-08 00:16:36 UTC FreeBSD src repository Modified files: sys/dev/sio sio.c sys/kern kern_synch.c kern_sysctl.c subr_uio.c vfs_bio.c vfs_mount.c vfs_subr.c vfs_vnops.c sys/pc98/cbus sio.c sys/sys proc.h uio.h sys/ufs/ffs ffs_softdep.c Log: SVN rev 218424 on 2011-02-08 00:16:36Z by mdf Based on discussions on the svn-src mailing list, rework r218195: - entirely eliminate some calls to uio_yeild() as being unnecessary, such as in a sysctl handler. - move should_yield() and maybe_yield() to kern_synch.c and move the prototypes from sys/uio.h to sys/proc.h - add a slightly more generic kern_yield() that can replace the functionality of uio_yield(). - replace source uses of uio_yield() with the functional equivalent, or in some cases do not change the thread priority when switching. - fix a logic inversion bug in vlrureclaim(), pointed out by bde@. - instead of using the per-cpu last switched ticks, use a per thread variable for should_yield(). With PREEMPTION, the only reasonable use of this is to determine if a lock has been held a long time and relinquish it. Without PREEMPTION, this is essentially the same as the per-cpu variable. Revision Changes Path 1.476 +0 -1 src/sys/dev/sio/sio.c 1.322 +33 -2 src/sys/kern/kern_synch.c 1.214 +1 -1 src/sys/kern/kern_sysctl.c 1.5 +1 -23 src/sys/kern/subr_uio.c 1.600 +1 -1 src/sys/kern/vfs_bio.c 1.328 +1 -1 src/sys/kern/vfs_mount.c 1.805 +4 -4 src/sys/kern/vfs_subr.c 1.300 +2 -2 src/sys/kern/vfs_vnops.c 1.251 +0 -1 src/sys/pc98/cbus/sio.c 1.563 +4 -0 src/sys/sys/proc.h 1.44 +0 -2 src/sys/sys/uio.h 1.265 +1 -1 src/sys/ufs/ffs/ffs_softdep.c