lkml.org 
[lkml]   [2012]   [Apr]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/3] perf: Support multiple stacks (v2)
Date
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.

Changelog:

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(-)

--
1.7.8.4



\
 
 \ /
  Last update: 2012-04-20 21:39    [W:0.029 / U:0.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site