From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
To: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
"marc.zyngier@arm.com" <marc.zyngier@arm.com>,
Will Deacon <will.deacon@arm.com>,
Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>,
Ian Campbell <Ian.Campbell@citrix.com>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Olof Johansson <olof@lixom.net>, <arnd@arndb.de>,
Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH v6 0/5] xen/arm/arm64: CONFIG_PARAVIRT and stolen ticks accounting
Date: Thu, 27 Jun 2013 14:53:37 +0100 [thread overview]
Message-ID: <alpine.DEB.2.02.1306271446570.4782@kaball.uk.xensource.com> (raw)
Hi all,
this patch series introduces stolen ticks accounting for Xen on ARM and
ARM64.
Stolen ticks are clocksource ticks that have been "stolen" from the cpu,
typically because Linux is running in a virtual machine and the vcpu has
been descheduled.
To account for these ticks we introduce CONFIG_PARAVIRT and pv_time_ops
so that we can make use of:
kernel/sched/cputime.c:steal_account_process_tick
In this last iteration I have added support for stolen ticks to arm64
and rebased on Catalin's upstream branch (that contains support for Xen
on arm64).
Stefano Stabellini (5):
xen: move xen_setup_runstate_info and get_runstate_snapshot to drivers/xen/time.c
kernel: missing include in cputime.c
arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops
arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops
xen/arm: account for stolen ticks
arch/arm/Kconfig | 20 ++++++++
arch/arm/include/asm/paravirt.h | 19 ++++++++
arch/arm/kernel/Makefile | 1 +
arch/arm/kernel/paravirt.c | 25 ++++++++++
arch/arm/xen/enlighten.c | 21 +++++++++
arch/arm64/Kconfig | 20 ++++++++
arch/arm64/include/asm/paravirt.h | 19 ++++++++
arch/arm64/kernel/Makefile | 1 +
arch/arm64/kernel/paravirt.c | 25 ++++++++++
arch/ia64/xen/time.c | 48 +++-----------------
arch/x86/xen/time.c | 76 +------------------------------
drivers/xen/Makefile | 2 +-
drivers/xen/time.c | 91 +++++++++++++++++++++++++++++++++++++
include/xen/xen-ops.h | 5 ++
kernel/sched/cputime.c | 4 +-
15 files changed, 258 insertions(+), 119 deletions(-)
create mode 100644 arch/arm/include/asm/paravirt.h
create mode 100644 arch/arm/kernel/paravirt.c
create mode 100644 arch/arm64/include/asm/paravirt.h
create mode 100644 arch/arm64/kernel/paravirt.c
create mode 100644 drivers/xen/time.c
git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xen.git lost_ticks_6
Cheers,
Stefano
next reply other threads:[~2013-06-27 13:53 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-27 13:53 Stefano Stabellini [this message]
2013-06-27 13:54 ` [PATCH v6 1/5] xen: move xen_setup_runstate_info and get_runstate_snapshot to drivers/xen/time.c Stefano Stabellini
2013-06-27 13:54 ` [PATCH v6 2/5] kernel: missing include in cputime.c Stefano Stabellini
2013-06-27 14:12 ` Peter Zijlstra
2013-06-27 14:17 ` Ingo Molnar
2013-06-27 14:43 ` Stefano Stabellini
2013-06-27 13:54 ` [PATCH v6 3/5] arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops Stefano Stabellini
2013-06-27 13:54 ` [PATCH v6 4/5] arm64: " Stefano Stabellini
2013-06-27 13:54 ` [PATCH v6 5/5] xen/arm: account for stolen ticks Stefano Stabellini
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