linux-kernel - Re: [PATCH v3 00/22] dyndbg: add support for writing debug logs to trace

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Date: Fri, 29 Dec 2023 01:05:30 +0100
From: Łukasz Bartosik <lb@...ihalf.com>
To: jim.cromie@...il.com
Cc: Jason Baron <jbaron@...mai.com>, Andrew Morton <akpm@...ux-foundation.org>, 
	Kees Cook <keescook@...omium.org>, Douglas Anderson <dianders@...omium.org>, 
	Guenter Roeck <groeck@...gle.com>, Yaniv Tzoreff <yanivt@...gle.com>, Benson Leung <bleung@...gle.com>, 
	Steven Rostedt <rostedt@...dmis.org>, Vincent Whitchurch <vincent.whitchurch@...s.com>, 
	Pekka Paalanen <ppaalanen@...il.com>, Sean Paul <seanpaul@...omium.org>, 
	Daniel Vetter <daniel@...ll.ch>, Simon Ser <contact@...rsion.fr>, 
	John Ogness <john.ogness@...utronix.de>, Petr Mladek <pmladek@...e.com>, 
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>, linux-kernel@...r.kernel.org, 
	upstream@...ihalf.com, Greg KH <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v3 00/22] dyndbg: add support for writing debug logs to trace

śr., 27 gru 2023 o 05:44 <jim.cromie@...il.com> napisał(a):
>
> > >
> > > Jim, I made a few changes to the test script dd-selftest.rc you created
> > > and I also added new test scenarios. You can find the entire patchset
> > > with the test script changes on top here
> > > https://chromium.googlesource.com/chromiumos/third_party/kernel/+log/refs/sandbox/ukaszb/dyndbg_trace_v3
> > > I wonder where would be the proper place to store the test script
> > > (upstream, your github.com:jimc/linux.git)
> > > Do you have a suggestion for that ?
> > >
> >
> > I got it (your HEAD), renamed and put it in:
> > tools/testing/selftests/dynamic_debug/
> > and copied & modified Makefile and config from ../users/
> > I added your SOB, that seems proper.
> >
>
> meh.
> my select-paste of your HEAD dropped all the whitespace.
> how annoying.
>
>
> > nice additions.  and I like the colors.  maybe they belong in lib.mk,
> > but thats 4 later.
> >
> > and tweaked the modules / DUTs to *hopefully* get stable callsite counts
> > from the tests on them, in virtually any usable config.
> > DUTs: file init/main, module mm_init, and module test_dynamic_debug (a
> > config constraint)
> > The ref-counts are taken from a default virtme-ng -k config on my x86-64 box
> >
> > I now pass tests up to:
> >
> > [root@v6 wk-proof]# ./tools/testing/selftests/dynamic_debug/dyndbg_selftest.sh
> > ...
> > # TEST_PRIVATE_TRACE_6
> > [ 1009.296557] dyndbg: read 3 bytes from userspace
> > [ 1009.296876] dyndbg: query 0: <=_> on module: <*>
> > [ 1009.297171] dyndbg: processed 1 queries, with 1559 matches, 0 errs
> > [ 1009.311621] dyndbg: read 39 bytes from userspace
> > [ 1009.312032] dyndbg: query 0: <open
> > A_bit_lengthy_trace_instance_name> on module: <*>
> > [ 1009.312569] dyndbg: instance is already opened
> > name:A_bit_lengthy_trace_instance_name
> > [ 1009.313063] dyndbg: processed 1 queries, with 0 matches, 1 errs
> > : ./tools/testing/selftests/dynamic_debug/dyndbg_selftest.sh:454
> > ddcmd() expected to exit with code 0
> > Error: 'File exists'
> >
>
> _7 has some obsolete counts, after previous $modname changes

Which obsolete counts are you referring to ?

Thanks,
Lukasz