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Stephane Eranian 07f29e658b perf/x86/intel: Check PEBS status correctly 
[ Upstream commit fc17db8aa4c53cbd2d5469bb0521ea0f0a6dbb27 ]

The kernel cannot disambiguate when 2+ PEBS counters overflow at the
same time. This is what the comment for this code suggests.  However,
I see the comparison is done with the unfiltered p->status which is a
copy of IA32_PERF_GLOBAL_STATUS at the time of the sample. This
register contains more than the PEBS counter overflow bits. It also
includes many other bits which could also be set.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201126110922.317681-2-namhyung@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-03-16 16:42:30 +08:00
..
alpha alpha: fix annotation of io{read,write}{16,32}be() 2021-03-16 16:34:34 +08:00
arc ARC: stack unwinding: don't assume non-current task is sleeping 2021-03-16 16:42:10 +08:00
arm ARM: dts: imx6qdl-kontron-samx6i: fix I2C_PM scl pin 2021-03-16 16:42:24 +08:00
arm64 arm64: syscall: exit userspace before unmasking exceptions 2021-03-16 16:42:29 +08:00
c6x Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
csky csky: Fixup abiv2 syscall_trace break a4 & a5 2021-03-16 16:28:56 +08:00
h8300 Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
hexagon hexagon: define ioremap_uc 2021-03-16 16:27:29 +08:00
ia64 ia64: fix build error with !COREDUMP 2021-03-16 16:40:09 +08:00
m68k m68k: q40: Fix info-leak in rtc_ioctl 2021-03-16 16:36:33 +08:00
microblaze Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
mips arch: pgtable: define MAX_POSSIBLE_PHYSMEM_BITS where needed 2021-03-16 16:41:41 +08:00
nds32 Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
nios2 Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
openrisc openrisc: Fix issue with get_user for 64-bit values 2021-03-16 16:39:36 +08:00
parisc kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables 2021-03-16 16:35:20 +08:00
powerpc powerpc: Drop -me200 addition to build flags 2021-03-16 16:42:10 +08:00
riscv arch: pgtable: define MAX_POSSIBLE_PHYSMEM_BITS where needed 2021-03-16 16:41:41 +08:00
s390 s390/cpum_sf.c: fix file permission for cpum_sfb_size 2021-03-16 16:41:30 +08:00
sh sh: landisk: Add missing initialization of sh_io_port_base 2021-03-16 16:34:22 +08:00
sparc sparc64: remove mm_cpumask clearing to fix kthread_use_mm race 2021-03-16 16:39:40 +08:00
um um: change sigio_spinlock to a mutex 2021-03-16 16:39:41 +08:00
unicore32 Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
x86 perf/x86/intel: Check PEBS status correctly 2021-03-16 16:42:30 +08:00
xtensa xtensa: uaccess: Add missing __user to strncpy_from_user() prototype 2021-03-16 16:41:40 +08:00
.gitignore Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Kconfig mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race 2021-03-16 16:39:40 +08:00