Bug 1224403 - bpftrace: ERROR: Error attaching probe: 'kprobe:swap_readpage'
Summary: bpftrace: ERROR: Error attaching probe: 'kprobe:swap_readpage'
Status: NEW
Alias: None
Product: openSUSE Tumbleweed
Classification: openSUSE
Component: Development (show other bugs)
Version: Current
Hardware: Other Other
: P5 - None : Normal (vote)
Target Milestone: ---
Assignee: Shung-Hsi Yu
QA Contact: E-mail List
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Reported: 2024-05-17 08:45 UTC by Petr Vorel
Modified: 2024-05-17 09:24 UTC (History)
2 users (show)

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Description Petr Vorel 2024-05-17 08:45:32 UTC 
bpftrace fails to attach probe:

# echo -e "\ninterval:s:5 { exit(); }" | cat /usr/share/bpftrace/tools/swapin.bt - | bpftrace -
stdin:1-16: WARNING: swap_readpage is not traceable (either non-existing, inlined, or marked as "notrace"); attaching to it will likely fail
Attaching 3 probes...
cannot attach kprobe, probe entry may not exist
ERROR: Error attaching probe: 'kprobe:swap_readpage'

# echo $?
255

It has been failing for some time (at least since 20240412, but probably much longer).
Comment 1 Anthony Iliopoulos 2024-05-17 09:24:38 UTC 
That's due to upstream kernel commit commit c9bdf768dd93 ("mm: convert swap_readpage() to swap_read_folio()"), merged in v6.8-rc1.

The swapin.bt probe needs to be changed accordingly from kprobe:swap_readpage to kprobe:swap_read_folio.