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authorLinus Torvalds <torvalds@linux-foundation.org>2024-03-12 15:18:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2024-03-12 15:18:34 -0700
commit1f440397665f4241346e4cc6d93f8b73880815d1 (patch)
tree9adc4bdf3eb853caf17194eb91bf0897737cc704 /Documentation/dev-tools
parent3749bda230478a8716a812f4d069c2f29dd246c4 (diff)
parent0c8e9b538ed7ecf4159b080ab0dafca3941c69db (diff)
Merge tag 'docs-6.9' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet: "A moderatly busy cycle for development this time around. - Some cleanup of the main index page for easier navigation - Rework some of the other top-level pages for better readability and, with luck, fewer merge conflicts in the future. - Submit-checklist improvements, hopefully the first of many. - New Italian translations - A fair number of kernel-doc fixes and improvements. We have also dropped the recommendation to use an old version of Sphinx. - A new document from Thorsten on bisection ... and lots of fixes and updates" * tag 'docs-6.9' of git://git.lwn.net/linux: (54 commits) docs: verify/bisect: fixes, finetuning, and support for Arch docs: Makefile: Add dependency to $(YNL_INDEX) for targets other than htmldocs docs: Move ja_JP/howto.rst to ja_JP/process/howto.rst docs: submit-checklist: use subheadings docs: submit-checklist: structure by category docs: new text on bisecting which also covers bug validation docs: drop the version constraints for sphinx and dependencies docs: kerneldoc-preamble.sty: Remove code for Sphinx <2.4 docs: Restore "smart quotes" for quotes docs/zh_CN: accurate translation of "function" docs: Include simplified link titles in main index docs: Correct formatting of title in admin-guide/index.rst docs: kernel_feat.py: fix build error for missing files MAINTAINERS: Set the field name for subsystem profile section kasan: Add documentation for CONFIG_KASAN_EXTRA_INFO Fixed case issue with 'fault-injection' in documentation kernel-doc: handle #if in enums as well Documentation: update mailing list addresses doc: kerneldoc.py: fix indentation scripts/kernel-doc: simplify signature printing ...
Diffstat (limited to 'Documentation/dev-tools')
-rw-r--r--Documentation/dev-tools/checkpatch.rst4
-rw-r--r--Documentation/dev-tools/kasan.rst21
2 files changed, 23 insertions, 2 deletions
diff --git a/Documentation/dev-tools/checkpatch.rst b/Documentation/dev-tools/checkpatch.rst
index c3389c6f3838..127968995847 100644
--- a/Documentation/dev-tools/checkpatch.rst
+++ b/Documentation/dev-tools/checkpatch.rst
@@ -168,7 +168,7 @@ Available options:
- --fix
- This is an EXPERIMENTAL feature. If correctable errors exists, a file
+ This is an EXPERIMENTAL feature. If correctable errors exist, a file
<inputfile>.EXPERIMENTAL-checkpatch-fixes is created which has the
automatically fixable errors corrected.
@@ -181,7 +181,7 @@ Available options:
- --ignore-perl-version
- Override checking of perl version. Runtime errors maybe encountered after
+ Override checking of perl version. Runtime errors may be encountered after
enabling this flag if the perl version does not meet the minimum specified.
- --codespell
diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
index 858c77fe7dc4..d56f298a9d7c 100644
--- a/Documentation/dev-tools/kasan.rst
+++ b/Documentation/dev-tools/kasan.rst
@@ -277,6 +277,27 @@ traces point to places in code that interacted with the object but that are not
directly present in the bad access stack trace. Currently, this includes
call_rcu() and workqueue queuing.
+CONFIG_KASAN_EXTRA_INFO
+~~~~~~~~~~~~~~~~~~~~~~~
+
+Enabling CONFIG_KASAN_EXTRA_INFO allows KASAN to record and report more
+information. The extra information currently supported is the CPU number and
+timestamp at allocation and free. More information can help find the cause of
+the bug and correlate the error with other system events, at the cost of using
+extra memory to record more information (more cost details in the help text of
+CONFIG_KASAN_EXTRA_INFO).
+
+Here is the report with CONFIG_KASAN_EXTRA_INFO enabled (only the
+different parts are shown)::
+
+ ==================================================================
+ ...
+ Allocated by task 134 on cpu 5 at 229.133855s:
+ ...
+ Freed by task 136 on cpu 3 at 230.199335s:
+ ...
+ ==================================================================
+
Implementation details
----------------------