[PATCH 0/3] perf: Support multiple stacks (v2)

From: Arun Sharma
Date: Fri Apr 20 2012 - 15:35:49 EST

If userspace has two or more stacks and we happen to take a sample when
the stack pointer is pointing to a higher stack, we might get truncated
callchains. This patch series tries to address that.


v2: do this for compat32 as well
v2: improve safety checks and reduce max callchain size

Arun Sharma (3):
perf, x86: Allow multiple stacks
perf, x86: Don't leak kernel data via callchains
perf, x86: Limit callchains to 127

arch/x86/kernel/cpu/perf_event.c | 14 +++++++-------
include/linux/perf_event.h | 2 +-
2 files changed, 8 insertions(+), 8 deletions(-)


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