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  1. 01 9月, 2010 2 次提交
    • A
      lockup_detector: Convert cpu notifier to return encapsulate errno value · eac24335
      由 Akinobu Mita 提交于 
      By the commit e6bde73b
("cpu-hotplug: return better errno on cpu hotplug failure"),
the cpu notifier can return encapsulate errno value, resulting
in more meaningful error codes for CPU hotplug failures.

This converts the cpu notifier to return encapsulate errno value
for the lockup_detector as well.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: peterz@infradead.org
Cc: gorcunov@gmail.com
Cc: fweisbec@gmail.com
LKML-Reference: <1283310009-22168-3-git-send-email-dzickus@redhat.com>
Signed-off-by: NDon Zickus <dzickus@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      eac24335
    • S
      tracing/lockdep: Fix dependency of TRACE_IRQFLAGS · 46b93b74
      由 Steven Rostedt 提交于 
      When CONFIG_IRQSOFF_TRACER is set and CONFIG_PROVE_LOCKING is not, we
get the following error:

$  make oldconfig
scripts/kconfig/conf --oldconfig arch/x86/Kconfig
warning: (IRQSOFF_TRACER && TRACING_SUPPORT && FTRACE && TRACE_IRQFLAGS_SUPPORT && !ARCH_USES_GETTIMEOFFSET) selects TRACE_IRQFLAGS which has unmet direct dependencies (DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && PROVE_LOCKING)
warning: (IRQSOFF_TRACER && TRACING_SUPPORT && FTRACE && TRACE_IRQFLAGS_SUPPORT && !ARCH_USES_GETTIMEOFFSET) selects TRACE_IRQFLAGS which has unmet direct dependencies (DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && PROVE_LOCKING)

This is because IRQSOFF_TRACER selects TRACE_IRQFLAGS but TRACE_IRQFLAGS
has PROVE_LOCKING as a dependency. This code is incorrect, and
this patch changes the TRACE_IRQFLAGS to be just a simple bool that
does not depend or select anything. Instead both IRQSOFF_TRACER and
PROVE_LOCKING select it.
Reported-by: NRichard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      46b93b74
  3. 30 8月, 2010 1 次提交
  5. 27 8月, 2010 2 次提交
    • F
      Merge branch 'perf/urgent' into perf/core · 98ee74a7
      由 Frederic Weisbecker 提交于 
      Conflicts:
	tools/perf/util/callchain.h

Merge reason:
	Fix a non-trivial conflict with latest fixes
      98ee74a7
    • F
      perf: Initialize callchains roots's childen hits · 5225c458
      由 Frederic Weisbecker 提交于 
      Each histogram entry has a callchain root that stores the
callchain samples. However we forgot to initialize the
tracking of children hits of these roots, which then got
random values on their creation.

The root children hits is multiplied by the minimum percentage
of hits provided by the user, and the result becomes the minimum
hits expected from children branches. If the random value due
to the uninitialization is big enough, then this minimum number
of hits can be huge and eventually filter every children branches.

The end result was invisible callchains. All we need to
fix this is to initialize the children hits of the root.
Reported-by: NChristoph Hellwig <hch@infradead.org>
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: 2.6.32.x-2.6.35.y <stable@kernel.org>
      5225c458
  7. 26 8月, 2010 6 次提交
  9. 25 8月, 2010 13 次提交
  11. 24 8月, 2010 16 次提交