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| author |   Benjamin Gray <bgray@linux.ibm.com> | 2023-08-29 16:34:55 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2023-09-18 12:23:47 +1000 |
| commit | cc879ab3ce39bc39f9b1d238b283f43a5f6f957d (patch) | |
| tree | 8110700ed8845eb60e09ab728ebfecb578a18ac0 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | powerpc/perf/hv-24x7: Update domain value check (diff) | |
| download | wireguard-linux-cc879ab3ce39bc39f9b1d238b283f43a5f6f957d.tar.xz wireguard-linux-cc879ab3ce39bc39f9b1d238b283f43a5f6f957d.zip | |
powerpc/watchpoints: Disable preemption in thread_change_pc()
thread_change_pc() uses CPU local data, so must be protected from
swapping CPUs while it is reading the breakpoint struct.
The error is more noticeable after 1e60f3564bad ("powerpc/watchpoints:
Track perf single step directly on the breakpoint"), which added an
unconditional __this_cpu_read() call in thread_change_pc(). However the
existing __this_cpu_read() that runs if a breakpoint does need to be
re-inserted has the same issue.
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230829063457.54157-2-bgray@linux.ibm.com
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions