From owner-cvs-src-old@FreeBSD.ORG Thu Jul 9 09:34:27 2009 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 987C01065686 for ; Thu, 9 Jul 2009 09:34:27 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [IPv6:2001:4f8:fff6::29]) by mx1.freebsd.org (Postfix) with ESMTP id 80F7D8FC1B for ; Thu, 9 Jul 2009 09:34:27 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.14.3/8.14.3) with ESMTP id n699YRTL007145 for ; Thu, 9 Jul 2009 09:34:27 GMT (envelope-from kib@repoman.freebsd.org) Received: (from svn2cvs@localhost) by repoman.freebsd.org (8.14.3/8.14.3/Submit) id n699YRs9007144 for cvs-src-old@freebsd.org; Thu, 9 Jul 2009 09:34:27 GMT (envelope-from kib@repoman.freebsd.org) Message-Id: <200907090934.n699YRs9007144@repoman.freebsd.org> X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to kib@repoman.freebsd.org using -f From: Konstantin Belousov Date: Thu, 9 Jul 2009 09:34:11 +0000 (UTC) To: cvs-src-old@freebsd.org X-FreeBSD-CVS-Branch: HEAD Subject: cvs commit: src/sys/amd64/amd64 cpu_switch.S exception.S genassym.c machdep.c sys_machdep.c vm_machdep.c src/sys/amd64/ia32 ia32_exception.S ia32_reg.c ia32_signal.c src/sys/amd64/include pcb.h src/sys/amd64/linux32 linux32_sysvec.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: Thu, 09 Jul 2009 09:34:27 -0000 kib 2009-07-09 09:34:11 UTC FreeBSD src repository Modified files: sys/amd64/amd64 cpu_switch.S exception.S genassym.c machdep.c sys_machdep.c vm_machdep.c sys/amd64/ia32 ia32_exception.S ia32_reg.c ia32_signal.c sys/amd64/include pcb.h sys/amd64/linux32 linux32_sysvec.c Log: SVN rev 195486 on 2009-07-09 09:34:11Z by kib Restore the segment registers and segment base MSRs for amd64 syscall return path only when neither thread was context switched while executing syscall code nor syscall explicitely modified LDT or MSRs. Save segment registers in trap handlers before interrupts are enabled, to not allow context switches to happen before registers are saved. Use separated byte in pcb for indication of fast/full return, since pcb_flags are not synchronized with context switches. The change puts back syscall microbenchmark numbers that were slowed down after commit of the support for LDT on amd64. Reviewed by: jeff Tested (and tested, and tested ...) by: pho Approved by: re (kensmith) Revision Changes Path 1.169 +1 -0 src/sys/amd64/amd64/cpu_switch.S 1.139 +19 -9 src/sys/amd64/amd64/exception.S 1.177 +1 -0 src/sys/amd64/amd64/genassym.c 1.705 +4 -0 src/sys/amd64/amd64/machdep.c 1.94 +8 -0 src/sys/amd64/amd64/sys_machdep.c 1.264 +5 -0 src/sys/amd64/amd64/vm_machdep.c 1.7 +7 -5 src/sys/amd64/ia32/ia32_exception.S 1.5 +1 -0 src/sys/amd64/ia32/ia32_reg.c 1.23 +7 -0 src/sys/amd64/ia32/ia32_signal.c 1.72 +2 -1 src/sys/amd64/include/pcb.h 1.52 +5 -0 src/sys/amd64/linux32/linux32_sysvec.c