Re: [PATCH v2 0/5] Add sysfs interface to collect reports from debugging tools

[Vlastimil Babka]

Should have CCd linux-api@, please do next time

On 1/15/21 2:03 PM, Alexander Potapenko wrote:
> This patchset adds a library that captures error reports from debugging
> tools like KASAN or KFENCE and exposes those reports to userspace via
> sysfs. Report capturing is controlled by two new types of tracepoints:
> error_report_start and error_report_end, that must be added to the tools
> that want to use this new feature.
> 
> v2:
>  - added ABI documentation for /sys/kernel/error_report/
>  - changed error_report_start and error_report end tracepoints to take
>    a fixed set of values for the error detector
> 
> Alexander Potapenko (5):
>   tracing: add error_report trace points
>   lib: add error_report_notify to collect debugging tools' reports
>   docs: ABI: add /sys/kernel/error_report/ documentation
>   kfence: use error_report_start and error_report_end tracepoints
>   kasan: use error_report_start and error_report_end tracepoints
> 
>  .../ABI/testing/sysfs-kernel-error_report     |  41 +++
>  include/trace/events/error_report.h           |  84 ++++++
>  kernel/trace/Makefile                         |   1 +
>  kernel/trace/error_report-traces.c            |  11 +
>  lib/Kconfig.debug                             |  14 +
>  lib/Makefile                                  |   2 +
>  lib/error_report_notify.c                     | 278 ++++++++++++++++++
>  mm/kasan/report.c                             |  15 +-
>  mm/kfence/report.c                            |   3 +
>  9 files changed, 443 insertions(+), 6 deletions(-)
>  create mode 100644 Documentation/ABI/testing/sysfs-kernel-error_report
>  create mode 100644 include/trace/events/error_report.h
>  create mode 100644 kernel/trace/error_report-traces.c
>  create mode 100644 lib/error_report_notify.c
>