From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: [patch 00/18] pvclock vsyscall support + KVM hypervisor support (v5) Date: Mon, 19 Nov 2012 19:57:58 -0200 Message-ID: <20121119215758.686768790@redhat.com> References: <20121115000823.285102321@redhat.com> Cc: johnstul@us.ibm.com, jeremy@goop.org, glommer@parallels.com To: mingo@kernel.org, kvm@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:44382 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752594Ab2KSV6a (ORCPT ); Mon, 19 Nov 2012 16:58:30 -0500 In-Reply-To: <20121115000823.285102321@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: This patchset, based on earlier work by Jeremy Fitzhardinge, implements paravirtual clock vsyscall support. It should be possible to implement Xen support relatively easily. It reduces clock_gettime from 500 cycles to 200 cycles on my testbox. v5: - reduce preempt disable window in kvm_get_wallclock (Glauber) - improve comment about SSE2 (Glauber) v4: - remove aligned_pvti structure, align directly (Glauber) - add comments to migration notifier (Glauber) - mark migration notifier condition as unlikely (Glauber) - add comment about rdtsc barrier dependency on sse2 (Gleb) - add idea to improve vdso gettime call (Gleb) - remove new msr interface, reuse kernel copy of pvclock data (Glauber) - move copying of timekeeping data from generic timekeeping code to kvm code (John) v3: - fix PVCLOCK_VSYSCALL_NR_PAGES definition (glommer) - fold flags race fix into pvclock refactoring (avi) - remove CONFIG_PARAVIRT_CLOCK_VSYSCALL (glommer) - add reference to tsc.c from vclock_gettime.c about cycle_last rationale (glommer) - fix whitespace damage (glommer) v2: - Do not allow visibility of different tuples. - Add option to disable vsyscall.