leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
41946c8687
linux/arch
History
Pan Xinhui 41946c8687 locking/core, powerpc: Implement vcpu_is_preempted(cpu) 
Optimize spinlock and mutex busy-loops by providing a vcpu_is_preempted(cpu)
function on pSeries. We do not support PowerNV.

All this can be achieved by using lppaca->yield_count, which is zero on PowerNV.

Suggested-by: Boqun Feng <boqun.feng@gmail.com>
Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David.Laight@ACULAB.COM
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: benh@kernel.crashing.org
Cc: borntraeger@de.ibm.com
Cc: bsingharora@gmail.com
Cc: dave@stgolabs.net
Cc: jgross@suse.com
Cc: kernellwp@gmail.com
Cc: konrad.wilk@oracle.com
Cc: linuxppc-dev@lists.ozlabs.org
Cc: mpe@ellerman.id.au
Cc: paulmck@linux.vnet.ibm.com
Cc: paulus@samba.org
Cc: pbonzini@redhat.com
Cc: rkrcmar@redhat.com
Cc: virtualization@lists.linux-foundation.org
Cc: will.deacon@arm.com
Cc: xen-devel-request@lists.xenproject.org
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1478077718-37424-5-git-send-email-xinhui.pan@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-22 12:48:06 +01:00
..
alpha locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
arc Merge branch 'linus' into locking/core, to pick up fixes 2016-11-22 12:37:38 +01:00
arm Merge branch 'linus' into locking/core, to pick up fixes 2016-11-22 12:37:38 +01:00
arm64 Merge branch 'linus' into locking/core, to pick up fixes 2016-11-22 12:37:38 +01:00
avr32 locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
blackfin locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
c6x locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
cris locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
frv locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
h8300 locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
hexagon locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
ia64 locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
m32r locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
m68k locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
metag locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
microblaze locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
mips locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
mn10300 locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
nios2 Merge branch 'linus' into locking/core, to pick up fixes 2016-11-22 12:37:38 +01:00
openrisc locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
parisc locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
powerpc locking/core, powerpc: Implement vcpu_is_preempted(cpu) 2016-11-22 12:48:06 +01:00
s390 Merge branch 'linus' into locking/core, to pick up fixes 2016-11-22 12:37:38 +01:00
score locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
sh locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
sparc Merge branch 'linus' into locking/core, to pick up fixes 2016-11-22 12:37:38 +01:00
tile Merge branch 'linus' into locking/core, to pick up fixes 2016-11-22 12:37:38 +01:00
um
unicore32 locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
x86 Merge branch 'linus' into locking/core, to pick up fixes 2016-11-22 12:37:38 +01:00
xtensa Merge branch 'linus' into locking/core, to pick up fixes 2016-11-22 12:37:38 +01:00
.gitignore
Kconfig