linux-toradex.git/include/trace/events/xen.h, branch v3.4.58

xen/mmu: Use Xen specific TLB flush instead of the generic one.

2012-11-17T21:15:54+00:00

commit 95a7d76897c1e7243d4137037c66d15cbf2cce76 upstream.

As Mukesh explained it, the MMUEXT_TLB_FLUSH_ALL allows the
hypervisor to do a TLB flush on all active vCPUs. If instead
we were using the generic one (which ends up being xen_flush_tlb)
we end up making the MMUEXT_TLB_FLUSH_LOCAL hypercall. But
before we make that hypercall the kernel will IPI all of the
vCPUs (even those that were asleep from the hypervisor
perspective). The end result is that we needlessly wake them
up and do a TLB flush when we can just let the hypervisor
do it correctly.

This patch gives around 50% speed improvement when migrating
idle guest's from one host to another.

Oracle-bug: 14630170

Tested-by:  Jingjie Jiang 
Suggested-by:  Mukesh Rathor 
Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Greg Kroah-Hartman

xen/tracing: fix compile errors when tracing is disabled.

2011-07-25T22:51:02+00:00

When CONFIG_FUNCTION_TRACER is disabled, compilation fails as follows:
  CC      arch/x86/xen/setup.o
In file included from arch/x86/include/asm/xen/hypercall.h:42,
                 from arch/x86/xen/setup.c:19:
include/trace/events/xen.h:31: warning: 'struct multicall_entry' declared inside parameter list
include/trace/events/xen.h:31: warning: its scope is only this definition or declaration, which is probably not what you want
include/trace/events/xen.h:31: warning: 'struct multicall_entry' declared inside parameter list
include/trace/events/xen.h:31: warning: 'struct multicall_entry' declared inside parameter list
include/trace/events/xen.h:31: warning: 'struct multicall_entry' declared inside parameter list
[...]
arch/x86/xen/trace.c:5: error: '__HYPERVISOR_set_trap_table' undeclared here (not in a function)
arch/x86/xen/trace.c:5: error: array index in initializer not of integer type
arch/x86/xen/trace.c:5: error: (near initialization for 'xen_hypercall_names')
arch/x86/xen/trace.c:6: error: '__HYPERVISOR_mmu_update' undeclared here (not in a function)
arch/x86/xen/trace.c:6: error: array index in initializer not of integer type
arch/x86/xen/trace.c:6: error: (near initialization for 'xen_hypercall_names')

Fix this by making sure struct multicall_entry has a declaration in
scope at all times, and don't bother compiling xen/trace.c when tracing
is disabled.

Reported-by: Randy Dunlap 
Signed-off-by: Jeremy Fitzhardinge

xen/trace: use class for multicall trace

2011-07-18T22:43:46+00:00

Signed-off-by: Jeremy Fitzhardinge

xen/trace: convert mmu events to use DECLARE_EVENT_CLASS()/DEFINE_EVENT()

2011-07-18T22:43:46+00:00

Signed-off-by: Jeremy Fitzhardinge

xen/trace: add tlb flush tracepoints

2011-07-18T22:43:27+00:00

Signed-off-by: Jeremy Fitzhardinge

xen/trace: add segment desc tracing

2011-07-18T22:43:27+00:00

Signed-off-by: Jeremy Fitzhardinge

xen/trace: add xen_pgd_(un)pin tracepoints

2011-07-18T22:43:27+00:00

Signed-off-by: Jeremy Fitzhardinge

xen/trace: add ptpage alloc/release tracepoints

2011-07-18T22:43:27+00:00

Signed-off-by: Jeremy Fitzhardinge

xen/trace: add mmu tracepoints

2011-07-18T22:43:27+00:00

Signed-off-by: Jeremy Fitzhardinge

xen/trace: add multicall tracing

2011-07-18T22:43:26+00:00

Signed-off-by: Jeremy Fitzhardinge