lkml.org 
[lkml]   [2017]   [Sep]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/4] make virt_spin_lock() a pvops function
Date
With virt_spin_lock() being a pvops function the bare metal case can be
optimized by patching the call away completely. In case a kernel running
as a guest it can decide whether to use paravitualized spinlocks, the
current fallback to the unfair test-and-set scheme, or to mimic the
bare metal behavior.

Juergen Gross (4):
paravirt: add generic _paravirt_false() function
paravirt: switch vcpu_is_preempted to use _paravirt_false() on bare
metal
paravirt: add virt_spin_lock pvops function
paravirt,xen: correct xen_nopvspin case

arch/x86/include/asm/paravirt.h | 5 ++++
arch/x86/include/asm/paravirt_types.h | 3 +++
arch/x86/include/asm/qspinlock.h | 48 ++++++++++++++++++++++++-----------
arch/x86/kernel/paravirt-spinlocks.c | 22 ++++++++--------
arch/x86/kernel/paravirt.c | 7 +++++
arch/x86/kernel/paravirt_patch_32.c | 18 ++++++-------
arch/x86/kernel/paravirt_patch_64.c | 17 +++++--------
arch/x86/kernel/smpboot.c | 2 ++
arch/x86/xen/spinlock.c | 2 ++
9 files changed, 79 insertions(+), 45 deletions(-)

--
2.12.3

\
 
 \ /
  Last update: 2017-09-05 15:25    [W:0.083 / U:0.392 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site