* [Bug bpf/24543] New: stapbpf breaks when cpu0 is disabled
@ 2019-05-09 18:52 me at serhei dot io
2019-06-24 18:29 ` [Bug bpf/24543] " me at serhei dot io
0 siblings, 1 reply; 2+ messages in thread
From: me at serhei dot io @ 2019-05-09 18:52 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=24543
Bug ID: 24543
Summary: stapbpf breaks when cpu0 is disabled
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: bpf
Assignee: systemtap at sourceware dot org
Reporter: me at serhei dot io
Target Milestone: ---
There is code in stapbpf to handle the case when some cpu cores are disabled.
However, certain things in stapbpf.cxx are still hardcoded to cpu0 (e.g. perf
group fd). If cpu0 is disabled, stapbpf doesn't work.
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* [Bug bpf/24543] stapbpf breaks when cpu0 is disabled
2019-05-09 18:52 [Bug bpf/24543] New: stapbpf breaks when cpu0 is disabled me at serhei dot io
@ 2019-06-24 18:29 ` me at serhei dot io
0 siblings, 0 replies; 2+ messages in thread
From: me at serhei dot io @ 2019-06-24 18:29 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=24543
Serhei Makarov <me at serhei dot io> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Serhei Makarov <me at serhei dot io> ---
Strictly speaking cpu0 is not always safe or possible to disable. But I was
able to do so on a test vm, so the fix has been committed just in case. (As
usual, before the fix stapbpf's error message is based on a failing syscall
return code, which fails to reveal the reason why things don't work.)
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