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alistair23-linux/arch/x86/xen
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Juergen Gross de7689cf8f x86/xen: Support the vCPU preemption check 
Support the vcpu_is_preempted() functionality under Xen. This will
enhance lock performance on overcommitted hosts (more runnable vCPUs
than physical CPUs in the system) as doing busy waits for preempted
vCPUs will hurt system performance far worse than early yielding.

A quick test (4 vCPUs on 1 physical CPU doing a parallel build job
with "make -j 8") reduced system time by about 5% with this patch.

Signed-off-by: Juergen Gross <jgross@suse.com>
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: boqun.feng@gmail.com
Cc: borntraeger@de.ibm.com
Cc: bsingharora@gmail.com
Cc: dave@stgolabs.net
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/1478077718-37424-11-git-send-email-xinhui.pan@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-22 12:48:09 +01:00
..
apic.c x86/apic: Remove the unused struct apic::apic_id_mask field 2016-07-15 10:39:05 +02:00
debugfs.c x86/xen: Audit and remove any unnecessary uses of module.h 2016-07-14 15:06:59 +02:00
debugfs.h
efi.c XEN: EFI: Move x86 specific codes to architecture directory 2016-07-06 10:34:46 +01:00
enlighten.c xen: fixes for 4.9-rc2 2016-10-24 19:52:24 -07:00
grant-table.c xen/grant-table: Use kmalloc_array() in arch_gnttab_valloc() 2016-08-26 10:44:22 +01:00
irq.c x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op 2016-07-25 13:32:34 +01:00
Kconfig xen: features and fixes for 4.3-rc0 2015-09-08 11:46:48 -07:00
Makefile xen/PMU: Initialization code for Xen PMU 2015-08-20 12:25:20 +01:00
mmu.c x86/xen: Audit and remove any unnecessary uses of module.h 2016-07-14 15:06:59 +02:00
mmu.h
multicalls.c
multicalls.h
p2m.c x86/xen: Audit and remove any unnecessary uses of module.h 2016-07-14 15:06:59 +02:00
pci-swiotlb-xen.c
platform-pci-unplug.c x86/xen: add missing \n at end of printk warning message 2016-09-30 11:21:45 +01:00
pmu.c xen: Make VPMU init message look less scary 2016-08-24 18:45:38 +01:00
pmu.h xen/PMU: Intercept PMU-related MSR and APIC accesses 2015-08-20 12:25:25 +01:00
setup.c x86/e820: Prepare e280 code for switch to dynamic storage 2016-09-21 15:02:12 +02:00
smp.c xen/x86: Update topology map for PV VCPUs 2016-10-06 11:47:05 +01:00
smp.h xen/x86: Move irq allocation from Xen smp_op.cpu_up() 2016-08-24 18:44:40 +01:00
spinlock.c x86/xen: Support the vCPU preemption check 2016-11-22 12:48:09 +01:00
suspend.c xen: features and fixes for 4.5-rc0 2016-01-12 13:05:36 -08:00
time.c xen: Remove event channel notification through Xen PCI platform device 2016-09-30 11:44:34 +01:00
trace.c
vdso.h
vga.c
xen-asm.h
xen-asm.S x86/asm/xen: Create stack frames in xen-asm.S 2016-02-24 08:35:42 +01:00
xen-asm_32.S x86/paravirt: Remove the unused irq_enable_sysexit pv op 2015-11-23 10:48:16 +01:00
xen-asm_64.S x86/asm/xen: Set ELF function type for xen_adjust_exception_frame() 2016-02-24 08:35:41 +01:00
xen-head.S Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-24 09:47:32 -07:00
xen-ops.h xen/pvhvm: run xen_vcpu_setup() for the boot CPU 2016-07-25 13:34:23 +01:00