Blame SOURCES/redhat-bugzilla-2003956-pmdabcc-update-kernel-version-check-due-to-backporting.patch
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bcc included in RHEL 8.6 doesn't support the kernel_struct_has_field function.
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The 4.18.x kernel in RHEL 8.6 did backport the `state` to `__state` rename (upstream:
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change was in kernel v5.14+), and now we're in a situation where we can't test for
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the existence of this kernel struct member and also can't rely on a kernel version check.
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Therefore, let's patch it here for RHEL 8.x only:
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diff --git a/src/pmdas/bcc/modules/runqlat.python b/src/pmdas/bcc/modules/runqlat.python
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index 1c6c6b4b0..efc30e958 100644
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--- a/src/pmdas/bcc/modules/runqlat.python
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+++ b/src/pmdas/bcc/modules/runqlat.python
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@@ -100,7 +100,7 @@ class PCPBCCModule(PCPBCCBase):
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if (
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hasattr(BPF, "kernel_struct_has_field")
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and BPF.kernel_struct_has_field(b"task_struct", b"__state") == 1
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- ) or self.kernel_version() >= (5, 14, 0):
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+ ) or self.kernel_version() >= (4, 18, 0):
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self.bpf_text = self.bpf_text.replace('STATE_FIELD', '__state')
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else:
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self.bpf_text = self.bpf_text.replace('STATE_FIELD', 'state')
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