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Waiman Long 47b428d14f xen/spinlock: Don't use pvqspinlock if only 1 vCPU 
On a VM with only 1 vCPU, the locking fast paths will always be
successful. In this case, there is no need to use the the PV qspinlock
code which has higher overhead on the unlock side than the native
qspinlock code.

The xen_pvspin veriable is also turned off in this 1 vCPU case to
eliminate unneeded pvqspinlock initialization in xen_init_lock_cpu()
which is run after xen_init_spinlocks().

Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2018-07-26 23:05:14 -04:00
..
alpha alpha: fix osf_wait4() breakage 2018-07-22 11:51:30 -07:00
arc ARC fixes for 4.18-rc6 2018-07-20 11:33:22 -07:00
arm ARM: SoC fixes for 4.18-rc 2018-07-21 17:27:42 -07:00
arm64 arm64: neon: Fix function may_use_simd() return error status 2018-07-11 17:02:02 +01:00
c6x Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-06-04 20:27:54 -07:00
h8300 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-06-04 20:27:54 -07:00
hexagon hexagon: drop the unused variable zero_page_mask 2018-06-15 07:55:25 +09:00
ia64 mm: make vm_area_alloc() initialize core fields 2018-07-21 15:24:03 -07:00
m68k m68k: fix "bad page state" oops on ColdFire boot 2018-07-02 10:05:13 +10:00
microblaze Microblaze patches for 4.18-rc3 2018-06-27 09:49:30 -07:00
mips MIPS: Fix ioremap() RAM check 2018-07-05 14:43:21 -07:00
nds32 nds32: fix build error "relocation truncated to fit: R_NDS32_25_PCREL_RELA" when 2018-07-05 16:13:47 +08:00
nios2 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-06-04 20:27:54 -07:00
openrisc openrisc: entry: Fix delay slot exception detection 2018-07-01 16:48:24 +09:00
parisc parisc: Build kernel without -ffunction-sections 2018-06-29 17:27:20 +02:00
powerpc powerpc/powernv: Fix save/restore of SPRG3 on entry/exit from stop (idle) 2018-07-18 20:40:17 +10:00
riscv RISC-V: Fix the rv32i kernel build 2018-07-04 14:12:53 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-07-06 09:14:34 -07:00
sh arch/*: Kconfig: fix documentation for NMI watchdog 2018-06-15 12:48:59 -03:00
sparc arch/*: Kconfig: fix documentation for NMI watchdog 2018-06-15 12:48:59 -03:00
um Solve a series of broken links for files under Documentation: 2018-06-17 05:25:18 +09:00
unicore32 docs: Fix some broken references 2018-06-15 18:10:01 -03:00
x86 xen/spinlock: Don't use pvqspinlock if only 1 vCPU 2018-07-26 23:05:14 -04:00
xtensa docs: Fix some broken references 2018-06-15 18:10:01 -03:00
.gitignore
Kconfig docs: Fix some broken references 2018-06-15 18:10:01 -03:00