View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001320 | channel: kernel/el8 | --kernel--request-for-enhancement-- | public | 2023-01-30 07:12 | 2024-02-28 19:08 |
| Reporter | lrfurtado | Assigned To | burakkucat | ||
| Priority | normal | Severity | feature | Reproducibility | always |
| Status | closed | Resolution | not fixable | ||
| Summary | 0001320: Request to enable kernel option CONFIG_DEBUG_INFO_BTF | ||||
| Description | hi elrepo friends, I am doing bpf development and I would like to be able to do it on elrepo kernels for that I need CONFIG_DEBUG_INFO_BTF to be enabled. This would save me from building my own kernel. Kind Regards, -Luciano | ||||
| Tags | No tags attached. | ||||
| related to | 0001323 | resolved | burakkucat | channel: kernel/el8 | Kernel 6.1.9 crash |
| related to | 0001350 | resolved | burakkucat | channel: kernel/el8 | Cannot load nf_conntrack on kernel-ml 6.3.1 |
| related to | 0001378 | resolved | toracat | channel: kernel/el7 | Enable support for CONFIG_DEBUG_INFO_BTF in kernels |
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The recently released kernel-ml update for el8 [1] now has the following configuration options enabled -- CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_DWARF4=y CONFIG_DEBUG_INFO_BTF=y CONFIG_DEBUG_INFO_BTF_MODULES=y When it is convenient, please test and report back with your observations. I have also queued the equivalent configuration adjustment for the next update of kernel-lt for el8. [1] https://lists.elrepo.org/pipermail/elrepo/2023-February/006363.html |
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Unfortunately the above configuration change had to be reverted as it produced a kernel-ml package set that failed to boot. [1] Further investigation is required . [1] https://elrepo.org/bugs/view.php?id=1323 |
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Apologies to @lrfurtado for the length of time it has taken to resolve this RFE. The resolution was to enable the following configuration options -- CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_DWARF4=y CONFIG_DEBUG_INFO_COMPRESSED_NONE=y CONFIG_DEBUG_INFO_BTF=y CONFIG_PAHOLE_HAS_SPLIT_BTF=y CONFIG_DEBUG_INFO_BTF_MODULES=y CONFIG_MODULE_ALLOW_BTF_MISMATCH=y When convenient, please test the latest kernel-ml and/or kernel-lt package set(s) for el8. |
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i suspect the change broke firewalld @burakkucat we are running kernel-ml on ol8. When using 6.3.1-1.el8.elrepo.x86_64 firewalld cannot apply its rules throwing errors. the kernel throws tons of "missing module BTF" messages like below: Mai 02 15:58:06 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:06 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:06 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:06 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:07 localhost.localdomain systemd[1]: var-lib-containers-storage-overlay.mount: Succeeded. Mai 02 15:58:07 localhost.localdomain systemd[1]: podman.service: Succeeded. Mai 02 15:58:07 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:07 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:07 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:07 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:07 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:07 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:07 localhost.localdomain tuned[905]: libperf: mmap_per_cpu: nr cpu values 2 nr threads 1 Mai 02 15:58:07 localhost.localdomain tuned[905]: libperf: idx 0: mmapping fd 8 Mai 02 15:58:07 localhost.localdomain tuned[905]: libperf: idx 1: mmapping fd 9 Mai 02 15:58:07 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:07 localhost.localdomain kernel: missing module BTF, cannot register kfuncs Mai 02 15:58:07 localhost.localdomain kernel: missing module BTF, cannot register kfuncs |
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downgrading to https://elrepo.org/linux/kernel/el8/x86_64/RPMS/kernel-ml-6.3.0-1.el8.elrepo.x86_64.rpm fixes the issue |
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Ack - thank you for the feedback. We are considering if the changes need to be reverted (again). |
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Unfortunately neither of the two potential configuration changes are viable as the first resulted in an non-bootable system and the second resulted in a regression in user-land. As there is nothing else that can be tried I am closing this RFE as "not fixable". |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2023-01-30 07:12 | lrfurtado | New Issue | |
| 2023-01-30 07:12 | lrfurtado | Status | new => assigned |
| 2023-01-30 07:12 | lrfurtado | Assigned To | => toracat |
| 2023-01-30 18:29 | burakkucat | Project | channel: elrepo/el8 => channel: kernel/el8 |
| 2023-01-30 20:53 | burakkucat | Status | assigned => acknowledged |
| 2023-01-30 20:54 | burakkucat | Assigned To | toracat => burakkucat |
| 2023-02-01 19:14 | burakkucat | Status | acknowledged => feedback |
| 2023-02-01 19:14 | burakkucat | Note Added: 0008945 | |
| 2023-02-03 12:43 | burakkucat | Relationship added | related to 0001323 |
| 2023-02-04 18:19 | burakkucat | Note Added: 0008963 | |
| 2023-02-13 11:08 | burakkucat | Status | feedback => acknowledged |
| 2023-02-13 11:10 | burakkucat | Severity | tweak => feature |
| 2023-05-02 10:08 | burakkucat | Note Added: 0009174 | |
| 2023-05-02 10:08 | burakkucat | Status | acknowledged => feedback |
| 2023-05-02 13:24 | fsy | Note Added: 0009175 | |
| 2023-05-02 15:36 | fsy | Note Added: 0009177 | |
| 2023-05-02 18:52 | pperry | Note Added: 0009179 | |
| 2023-05-02 22:26 | toracat | Relationship added | related to 0001350 |
| 2023-05-04 14:49 | burakkucat | Status | feedback => assigned |
| 2023-05-06 12:19 | burakkucat | Status | assigned => closed |
| 2023-05-06 12:19 | burakkucat | Resolution | open => not fixable |
| 2023-05-06 12:19 | burakkucat | Note Added: 0009189 | |
| 2023-08-17 17:39 | toracat | Relationship added | related to 0001378 |
