summaryrefslogtreecommitdiff
path: root/fs/exec.c
diff options
context:
space:
mode:
authorOleg Nesterov <oleg@redhat.com>2013-06-20 17:50:09 +0200
committerIngo Molnar <mingo@kernel.org>2013-06-20 17:57:01 +0200
commitc790b0ad23f427c7522ffed264706238c57c007e (patch)
treeb05dfd247ea14cbba3931b44614635b0de4760fd /fs/exec.c
parent8b4d801b2b123b6c09742f861fe44a8527b84d47 (diff)
hw_breakpoint: Use cpu_possible_mask in {reserve,release}_bp_slot()
fetch_bp_busy_slots() and toggle_bp_slot() use for_each_online_cpu(), this is obviously wrong wrt cpu_up() or cpu_down(), we can over/under account the per-cpu numbers. For example: # echo 0 >> /sys/devices/system/cpu/cpu1/online # perf record -e mem:0x10 -p 1 & # echo 1 >> /sys/devices/system/cpu/cpu1/online # perf record -e mem:0x10,mem:0x10,mem:0x10,mem:0x10 -C1 -a & # taskset -p 0x2 1 triggers the same WARN_ONCE("Can't find any breakpoint slot") in arch_install_hw_breakpoint(). Reported-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20130620155009.GA6327@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'fs/exec.c')
0 files changed, 0 insertions, 0 deletions