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[PULL,Xenial] Revert arm64 KVM switch to CLOCK_MONOTONIC_RAW

Message ID CALdTtnsXqJ6rGwbyHURgx9bXU4v9gzaTRoUCqQGGA0WH=y0Hsg@mail.gmail.com
State New
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Pull-request

git://kernel.ubuntu.com/dannf/ubuntu-xenial.git REVERT-hrtimer-C_M_R

Message

dann frazier March 21, 2016, 9:26 p.m. UTC 
In testing, we found that the performance in large VMs (~90 cores) was
severely impacted by these changes. Upstream also chose to later
revert these patches from linux-next:
   http://lkml.iu.edu/hypermail/linux/kernel/1603.0/02726.html
I suggest we drop them for now and await a more suitable fix for LP: #1549494.

The following changes since commit c3a461f342afc842d56df5dff8cbabd3437ce083:

  arcmsr: change driver version to v1.30.00.22-20151126 (2016-03-21
10:25:17 -0600)

are available in the git repository at:

  git://kernel.ubuntu.com/dannf/ubuntu-xenial.git REVERT-hrtimer-C_M_R

for you to fetch changes up to ac1e4b55b0eacf960906bc5d2517942cc7371912:

  Revert "KVM: arm/arm64: timer: Switch to CLOCK_MONOTONIC_RAW"
(2016-03-21 15:16:44 -0600)

----------------------------------------------------------------
dann frazier (3):
      Revert "hrtimer: Add support for CLOCK_MONOTONIC_RAW"
      Revert "hrtimer: Catch illegal clockids"
      Revert "KVM: arm/arm64: timer: Switch to CLOCK_MONOTONIC_RAW"

 include/linux/hrtimer.h   |  1 -
 kernel/time/hrtimer.c     | 18 ++----------------
 virt/kvm/arm/arch_timer.c |  4 ++--
 3 files changed, 4 insertions(+), 19 deletions(-)

Comments

Tim Gardner March 21, 2016, 11:28 p.m. UTC | #1