From: Alexei Starovoitov Date: Thu, 19 Feb 2026 19:29:41 +0000 (-0800) Subject: Merge branch 'selftests-bpf-fix-flaky-build_id-test' X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9cd168a2720bc614647dd20bc5d1c308c56a44ec;p=thirdparty%2Flinux.git Merge branch 'selftests-bpf-fix-flaky-build_id-test' Gregory Bell says: ==================== selftests/bpf: fix flaky build_id test The build_id selftest intermittently fails with the following error: ./test_progs -t build_id/nofault-paged-out serial_test_build_id:PASS:parse_build_id 0 nsec subtest_nofault:PASS:skel_open 0 nsec subtest_nofault:PASS:link 0 nsec subtest_nofault:PASS:trigger_uprobe 0 nsec subtest_nofault:PASS:res 0 nsec subtest_nofault:FAIL:build_id_status unexpected build_id_status: actual 1 != expected 2 46/1 build_id/nofault-paged-out:FAIL 46 build_id:FAIL 397 stacktrace_build_id:OK 398 stacktrace_build_id_nmi:OK On RHEL we consistently hit the reported failure on the first run of the test following installation, after which subsequent runs pass. This patch implements the approach discussed in the following thread: https://lore.kernel.org/all/CAEf4BzYWVtfZh07iQm5Fo=kMm+8hgAu+rXRx1uLRHz07wc59+Q@mail.gmail.com/ Following the discussion, the fix makes the test verify eviction rather than assuming it. In the discussion it was recommended to add a sleep before and after the madvise operations, this did not resolve the issue in our case, rather the test timed out every time. I was successful by retrying the page-out sequence until the page is actually evicted. Additionally, the mapping alignment is increased to 64K so the test operates on a properly page-aligned buffer across supported architectures. changelog: - fixed indentations - removed trailing whitespace - add space between opening and closing brackets ==================== Link: https://patch.msgid.link/cover.1771338492.git.grbell@redhat.com Signed-off-by: Alexei Starovoitov --- 9cd168a2720bc614647dd20bc5d1c308c56a44ec