Hi Thomas,
I couldn't understand one part of hrtimer (obviously there are
others as well, but here I am sure I couldn't understood it :)).
In switch_hrtimer_base() we are calling hrtimer_check_target()
which guarantees this:
/*
* With HIGHRES=y we do not migrate the timer when it is expiring
* before the next event on the target cpu because we cannot reprogram
* the target cpu hardware and we would cause it to fire late.
*
* Called with cpu_base->lock of target cpu held.
*/
But switch_hrtimer_base() is only called from one place, i.e.
__hrtimer_start_range_ns() and at the point (where we call
switch_hrtimer_base()) expiration time is not yet known as
we call this routine later:
hrtimer_set_expires_range_ns()
So, do we really need to call hrtimer_check_target() at all
in switch_hrtimer_base()? Or do we need to move
hrtimer_set_expires_range_ns() before calling
switch_hrtimer_base() ??
--
viresh
Hi Gary,
Could you please try these two patches wrt
[Bug 1283532] [NEW] NO_HZ fails for BE
I've tested it on my arndale board with my kernel that
they fix cpu hotplug issue for arndale board. I do not have
RT linux setup, so would appreciate help in testing.
Thanks,
Victor
Victor Kamensky (2):
ARM: EXYNOS: Fix hotplug wfi instruction in BE case
ARM: EXYNOS: Fix hotplug BE image mon and hyp mode BE switch
arch/arm/mach-exynos/headsmp.S | 5 ++++-
arch/arm/mach-exynos/hotplug.c | 2 +-
2 files changed, 5 insertions(+), 2 deletions(-)
--
1.8.1.4
Hi Russell,
Please pull fixes for ARM Kprobes big-endian support.
It is reworked initial Ben's series for big endian support [1].
Dropped patches that are not directly related to kprobes.
Current set of patches is enough to have functional BE kprobes.
One ARM kprobe test fails on Cortex-A15 boards (TC2 and Keystone2 EVM),
while it passes on Pandaboard. The issue is not related to this series
and already present in v3.13-rc7.
[1] http://www.spinics.net/lists/arm-kernel/msg285210.html
--
Taras Kondratiuk
--->8
The following changes since commit 7e22e91102c6b9df7c4ae2168910e19d2bb14cd6:
Linux 3.13-rc8 (2014-01-12 17:04:18 +0700)
are available in the git repository at:
git://git.linaro.org/people/taras.kondratiuk/linux.git tags/for_russell/arm-be-kprobes
for you to fetch changes up to 1c2d814c019b63bf0778fc2d2fd54c6e44f1ab5d:
ARM: kprobes-test: Workaround GAS .align bug (2014-01-13 13:58:52 +0200)
----------------------------------------------------------------
Ben Dooks (4):
ARM: kprobes: fix instruction fetch order with <asm/opcodes.h>
ARM: kprobes-test: use <asm/opcodes.h> for instruction accesses
ARM: kprobes-test: use <asm/opcodes.h> for ARM instruction building
ARM: kprobes-test: use <asm/opcodes.h> for Thumb instruction building
Taras Kondratiuk (1):
ARM: kprobes-test: Workaround GAS .align bug
arch/arm/kernel/kprobes-common.c | 19 +-
arch/arm/kernel/kprobes-test-arm.c | 603 +++++++++++++++++-----------------
arch/arm/kernel/kprobes-test-thumb.c | 447 ++++++++++++-------------
arch/arm/kernel/kprobes-test.c | 13 +-
arch/arm/kernel/kprobes-test.h | 2 +-
arch/arm/kernel/kprobes-thumb.c | 20 +-
arch/arm/kernel/kprobes.c | 9 +-
7 files changed, 562 insertions(+), 551 deletions(-)
