AuxXxilium/linux_dsm_epyc7002
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Adrian Hunter 09b3e0bc8e perf intel-pt: Fix 'CPU too large' error 
commit 5501e9229a80d95a1ea68609f44c447a75d23ed5 upstream.

In some cases, the number of cpus (nr_cpus_online) is confused with the
maximum cpu number (nr_cpus_avail), which results in the error in the
example below:

Example on system with 8 cpus:

 Before:
   # echo 0 > /sys/devices/system/cpu/cpu2/online
   # ./perf record --kcore -e intel_pt// taskset --cpu-list 7 uname
   Linux
   [ perf record: Woken up 1 times to write data ]
   [ perf record: Captured and wrote 0.147 MB perf.data ]
   # ./perf script --itrace=e
   Requested CPU 7 too large. Consider raising MAX_NR_CPUS
   0x25908 [0x8]: failed to process type: 68 [Invalid argument]

 After:
   # ./perf script --itrace=e
   #

Fixes: 8c7274691f ("perf machine: Replace MAX_NR_CPUS with perf_env::nr_cpus_online")
Fixes: 7df4e36a47 ("perf session: Replace MAX_NR_CPUS with perf_env::nr_cpus_online")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lore.kernel.org/lkml/20210107174159.24897-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-01-19 18:27:29 +01:00
..
accounting
arch x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes 2020-12-06 09:58:13 +01:00
bootconfig tools/bootconfig: Add tracing_on support to helper scripts 2021-01-19 18:27:19 +01:00
bpf bpftool: Fix compilation failure for net.o with older glibc 2021-01-17 14:17:03 +01:00
build tools build: Add missing libcap to test-all.bin target 2020-12-30 11:53:59 +01:00
cgroup
debugging
edid
firewire
firmware
gpio
hv
iio
include tools headers UAPI: Sync linux/fscrypt.h with the kernel sources 2021-01-17 14:17:06 +01:00
io_uring
kvm/kvm_stat tools/kvm_stat: Exempt time-based counters 2020-12-11 19:18:51 -05:00
laptop
leds
lib libbpf: Sanitise map names before pinning 2020-12-30 11:53:33 +01:00
memory-model
objtool
pci
pcmcia
perf perf intel-pt: Fix 'CPU too large' error 2021-01-19 18:27:29 +01:00
power
scripts
spi
testing selftests: fix the return value for UDP GRO test 2021-01-19 18:27:26 +01:00
thermal/tmon
time
usb
virtio
vm
wmi
Makefile