From owner-cvs-src@FreeBSD.ORG Wed Nov 1 04:54:51 2006 Return-Path: X-Original-To: cvs-src@FreeBSD.org Delivered-To: cvs-src@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BB14F16A403; Wed, 1 Nov 2006 04:54:51 +0000 (UTC) (envelope-from jb@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8814043D49; Wed, 1 Nov 2006 04:54:51 +0000 (GMT) (envelope-from jb@FreeBSD.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.13.6/8.13.6) with ESMTP id kA14spp9014614; Wed, 1 Nov 2006 04:54:51 GMT (envelope-from jb@repoman.freebsd.org) Received: (from jb@localhost) by repoman.freebsd.org (8.13.6/8.13.4/Submit) id kA14spYn014613; Wed, 1 Nov 2006 04:54:51 GMT (envelope-from jb) Message-Id: <200611010454.kA14spYn014613@repoman.freebsd.org> From: John Birrell Date: Wed, 1 Nov 2006 04:54:51 +0000 (UTC) To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org X-FreeBSD-CVS-Branch: HEAD Cc: Subject: cvs commit: src/sys/amd64/amd64 genassym.c src/sys/arm/arm genassym.c src/sys/i386/i386 genassym.c src/sys/ia64/ia64 genassym.c src/sys/kern subr_prf.c tty_cons.c src/sys/powerpc/powerpc genassym.c src/sys/sparc64/sparc64 ... X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Nov 2006 04:54:51 -0000 jb 2006-11-01 04:54:51 UTC FreeBSD src repository Modified files: sys/amd64/amd64 genassym.c sys/arm/arm genassym.c sys/i386/i386 genassym.c sys/ia64/ia64 genassym.c sys/kern subr_prf.c tty_cons.c sys/powerpc/powerpc genassym.c sys/sparc64/sparc64 genassym.c sys/sys cons.h pcpu.h Log: Add a cnputs() function to write a string to the console with a lock to prevent interspersed strings written from different CPUs at the same time. To avoid putting a buffer on the stack or having to malloc one, space is incorporated in the per-cpu structure. The buffer size if 128 bytes; chosen because it's the next power of 2 size up from 80 characters. String writes to the console are buffered up the end of the line or until the buffer fills. Then the buffer is flushed to all console devices. Existing low level console output via cnputc() is unaffected by this change. ithread calls to log() are also unaffected to avoid blocking those threads. A minor change to the behaviour in a panic situation is that console output will still be buffered, but won't be written to a tty as before. This should prevent interspersed panic output as a number of CPUs panic before we end up single threaded running ddb. Reviewed by: scottl, jhb MFC after: 2 weeks Revision Changes Path 1.158 +1 -0 src/sys/amd64/amd64/genassym.c 1.7 +1 -0 src/sys/arm/arm/genassym.c 1.154 +1 -0 src/sys/i386/i386/genassym.c 1.43 +1 -0 src/sys/ia64/ia64/genassym.c 1.126 +72 -17 src/sys/kern/subr_prf.c 1.136 +25 -0 src/sys/kern/tty_cons.c 1.57 +1 -0 src/sys/powerpc/powerpc/genassym.c 1.62 +1 -0 src/sys/sparc64/sparc64/genassym.c 1.40 +1 -0 src/sys/sys/cons.h 1.18 +5 -0 src/sys/sys/pcpu.h