linux_dsm_epyc7002/arch/x86/oprofile
Robert Richter 8fe7e94eb7 oprofile, x86: Fix race in nmi handler while starting counters
In some rare cases, nmis are generated immediately after the nmi
handler of the cpu was started. This causes the counter not to be
enabled. Before enabling the nmi handlers we need to set variable
ctr_running first and make sure its value is written to memory.

Also, the patch makes all existing barriers a memory barrier instead
of a compiler barrier only.

Reported-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: <stable@kernel.org> # .35+
Signed-off-by: Robert Richter <robert.richter@amd.com>
2011-06-15 14:31:29 +02:00
..
backtrace.c x86: Remove warning and warning_symbol from struct stacktrace_ops 2011-05-12 15:31:28 +02:00
init.c x86: coding style fixes to arch/x86/oprofile/init.c 2008-04-17 17:40:49 +02:00
Makefile x86/oprofile: reanaming op_model_athlon.c to op_model_amd.c 2008-07-26 11:48:14 +02:00
nmi_int.c oprofile, x86: Fix race in nmi handler while starting counters 2011-06-15 14:31:29 +02:00
nmi_timer_int.c x86, NMI: Add priorities to handlers 2011-01-07 15:08:52 +01:00
op_counter.h oprofile, x86: Allow setting EDGE/INV/CMASK for counter events 2011-03-24 18:45:44 +01:00
op_model_amd.c oprofile, x86: Add comments to IBS LVT offset initialization 2011-05-30 16:36:54 +02:00
op_model_p4.c Kill off warning: ‘inline’ is not at beginning of declaration 2011-01-19 15:43:08 +01:00
op_model_ppro.c x86: Replace uses of current_cpu_data with this_cpu ops 2010-12-30 12:22:03 +01:00
op_x86_model.h oprofile/x86: make AMD IBS hotplug capable 2010-05-06 15:11:15 +02:00