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| author | Borislav Petkov <bp@alien8.de> | 2020-12-22 16:05:55 +0300 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2021-02-05 00:18:35 +0300 |
| commit | 78f101a1b25848a364c632237ee6a7a6ec468235 (patch) | |
| tree | 0f255178e2866a6a1b1ca3ec08643b8ea72b11a5 /Documentation | |
| parent | 4217e5074f33d855873370378d427e329b60a7b4 (diff) | |
| download | linux-78f101a1b25848a364c632237ee6a7a6ec468235.tar.xz | |
Documentation/submitting-patches: Add blurb about backtraces in commit messages
Document that backtraces in commit messages should be trimmed down to
the useful information only.
This has been carved out from a tip subsystem handbook patchset by
Thomas Gleixner:
https://lkml.kernel.org/r/20181107171010.421878737@linutronix.de
and incorporates follow-on comments.
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/process/submitting-patches.rst | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/process/submitting-patches.rst b/Documentation/process/submitting-patches.rst index 7f48cccc75cd..8c991c863628 100644 --- a/Documentation/process/submitting-patches.rst +++ b/Documentation/process/submitting-patches.rst @@ -684,6 +684,26 @@ generates appropriate diffstats by default.) See more details on the proper patch format in the following references. +Backtraces in commit mesages +^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Backtraces help document the call chain leading to a problem. However, +not all backtraces are helpful. For example, early boot call chains are +unique and obvious. Copying the full dmesg output verbatim, however, +adds distracting information like timestamps, module lists, register and +stack dumps. + +Therefore, the most useful backtraces should distill the relevant +information from the dump, which makes it easier to focus on the real +issue. Here is an example of a well-trimmed backtrace:: + + unchecked MSR access error: WRMSR to 0xd51 (tried to write 0x0000000000000064) + at rIP: 0xffffffffae059994 (native_write_msr+0x4/0x20) + Call Trace: + mba_wrmsr + update_domains + rdtgroup_mkdir + .. _explicit_in_reply_to: Explicit In-Reply-To headers |