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From: Petr Mladek <pmladek@suse.com>
To: Jim Cromie <jim.cromie@gmail.com>
Cc: jbaron@akamai.com, linux-kernel@vger.kernel.org,
	akpm@linuxfoundation.org, gregkh@linuxfoundation.org,
	linux@rasmusvillemoes.dk, Jonathan Corbet <corbet@lwn.net>,
	Andrew Morton <akpm@linux-foundation.org>,
	Will Deacon <will@kernel.org>, Orson Zhai <orson.zhai@unisoc.com>,
	linux-doc@vger.kernel.org
Subject: Re: [PATCH v2 15/24] dyndbg: extend ddebug_parse_flags to accept optional leading filter-flags
Date: Mon, 15 Jun 2020 17:37:27 +0200	[thread overview]
Message-ID: <20200615153727.GK31238@alley> (raw)
In-Reply-To: <20200613155738.2249399-16-jim.cromie@gmail.com>

On Sat 2020-06-13 09:57:29, Jim Cromie wrote:
> change ddebug_parse_flags to accept optional filterflags before OP.
> this now sets the parameter added in ~1

What is "~1", please?

> ---
>  .../admin-guide/dynamic-debug-howto.rst       | 18 +++++++----
>  lib/dynamic_debug.c                           | 30 ++++++++++---------
>  2 files changed, 28 insertions(+), 20 deletions(-)
> 
> diff --git a/Documentation/admin-guide/dynamic-debug-howto.rst b/Documentation/admin-guide/dynamic-debug-howto.rst
> index 6c04aea8f4cd..4f343e6036f5 100644
> --- a/Documentation/admin-guide/dynamic-debug-howto.rst
> +++ b/Documentation/admin-guide/dynamic-debug-howto.rst
> @@ -217,13 +217,19 @@ line
>  	line -1605          // the 1605 lines from line 1 to line 1605
>  	line 1600-          // all lines from line 1600 to the end of the file
>  
> -The flags specification comprises a change operation followed
> -by one or more flag characters.  The change operation is one
> -of the characters::

This removes rather useful information and there is no replacement.

> +Flags Specification::
>  
> -  -    remove the given flags
> -  +    add the given flags
> -  =    set the flags to the given flags
> +  flagspec	::= filterflags? OP modflags
> +  filterflags	::= flagset
> +  modflags	::= flagset
> +  flagset	::= ([pfmltu_] | [PFMLTU_])+	# also cant have pP etc
> +  OP		::= [-+=]

I have to say that dynamic debug interface always looked pretty
complicated to me. But I have no idea what the above means.

It explans some syntax. But it does not explain what filterfalgs
and modflags mean and how they would affect the operation.

Also some examples would be very useful.

Best Regards,
Petr

  reply	other threads:[~2020-06-15 15:37 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-13 15:57 [PATCH v2 00/24] dynamic_debug cleanups, query features, WIP print-classes Jim Cromie
2020-06-13 15:57 ` [PATCH v2 01/24] dyndbg-docs: eschew file /full/path query in docs Jim Cromie
2020-06-14  6:04   ` Greg KH
2020-06-14 14:24     ` jim.cromie
2020-06-13 15:57 ` [PATCH v2 02/24] dyndbg-docs: initialization is done early, not arch Jim Cromie
2020-06-13 15:57 ` [PATCH v2 03/24] dyndbg: drop obsolete comment on ddebug_proc_open Jim Cromie
2020-06-13 15:57 ` [PATCH v2 04/24] dyndbg: refine debug verbosity; 1 is basic, 2 more chatty Jim Cromie
2020-06-13 15:57 ` [PATCH v2 05/24] dyndbg: rename __verbose section to __dyndbg Jim Cromie
2020-06-13 15:57 ` [PATCH v2 06/24] dyndbg: fix overcounting of ram used by dyndbg Jim Cromie
2020-06-13 15:57 ` [PATCH v2 07/24] dyndbg: fix a BUG_ON in ddebug_describe_flags Jim Cromie
2020-06-15 13:20   ` Petr Mladek
2020-06-15 21:53     ` jim.cromie
2020-06-13 15:57 ` [PATCH v2 08/24] dyndbg: make ddebug_tables list LIFO for add/remove_module Jim Cromie
2020-06-13 15:57 ` [PATCH v2 09/24] dyndbg: add maybe(str,"") macro to reduce code Jim Cromie
2020-06-13 16:14   ` Joe Perches
2020-06-15 20:50     ` jim.cromie
2020-06-15 13:28   ` Petr Mladek
2020-06-15 20:52     ` jim.cromie
2020-06-13 15:57 ` [PATCH v2 10/24] dyndbg: refactor parse_linerange out of ddebug_parse_query Jim Cromie
2020-06-15 13:37   ` Petr Mladek
2020-06-15 22:37     ` jim.cromie
2020-06-13 15:57 ` [PATCH v2 11/24] dyndbg: accept 'file foo.c:func1' and 'file foo.c:10-100' Jim Cromie
2020-06-15 14:46   ` Petr Mladek
2020-06-13 15:57 ` [PATCH v2 12/24] dyndbg: refactor ddebug_read_flags out of ddebug_parse_flags Jim Cromie
2020-06-13 15:57 ` [PATCH v2 13/24] dyndbg: combine flags & mask into a struct, use that Jim Cromie
2020-06-15 15:14   ` Petr Mladek
2020-06-16  5:47     ` jim.cromie
2020-06-16 11:34       ` Petr Mladek
2020-06-13 15:57 ` [PATCH v2 14/24] dyndbg: add filter parameter to ddebug_parse_flags Jim Cromie
2020-06-15 15:17   ` Petr Mladek
2020-06-13 15:57 ` [PATCH v2 15/24] dyndbg: extend ddebug_parse_flags to accept optional leading filter-flags Jim Cromie
2020-06-15 15:37   ` Petr Mladek [this message]
2020-06-13 15:57 ` [PATCH v2 16/24] dyndbg: prefer declarative init in caller, to memset in callee Jim Cromie
2020-06-13 15:57 ` [PATCH v2 17/24] dyndbg: add user-flag, negating-flags, and filtering on flags Jim Cromie
2020-06-16 11:41   ` Petr Mladek
2020-06-13 15:57 ` [PATCH v2 18/24] dyndbg: allow negating flag-chars in modflags Jim Cromie
2020-06-16 11:47   ` Petr Mladek
2020-06-13 15:57 ` [PATCH v2 19/24] dyndbg: accept query terms like module:foo and file=bar Jim Cromie
2020-06-16 11:57   ` Petr Mladek
2020-06-16 20:08     ` jim.cromie
2020-06-17 12:11       ` Petr Mladek
2020-06-17 13:32         ` jim.cromie
2020-06-17 14:01           ` Greg KH
2020-06-13 15:57 ` [PATCH v2 20/24] dyndbg: WIP towards debug-print-class based callsite controls Jim Cromie
2020-06-13 19:22   ` Joe Perches
2020-06-16 13:45   ` Petr Mladek
2020-06-16 21:05     ` Joe Perches
2020-06-17  9:31       ` Daniel Thompson
2020-06-17  9:52         ` Petr Mladek
2020-06-17 13:23           ` jim.cromie
2020-06-18 12:20             ` Petr Mladek
2020-06-16 21:13     ` jim.cromie
2020-06-16 21:25       ` jim.cromie
2020-06-13 15:57 ` [PATCH v2 21/24] dyndbg: adapt header macros to pass print-class Jim Cromie
2020-06-13 17:11   ` kernel test robot
2020-06-13 20:25   ` kernel test robot
2020-06-13 15:57 ` [PATCH v2 22/24] dyndbg: add print-class as trailing number to control output Jim Cromie
2020-06-13 15:57 ` [PATCH v2 23/24] kset-example: add pr_debug()s for easy visibility of its operation Jim Cromie
2020-06-14  6:05   ` Greg KH
2020-06-15 22:18     ` jim.cromie
2020-06-16  6:37       ` Greg KH
2020-06-13 15:57 ` [PATCH v2 24/24] kset-example: use pr_debug_n to create example print-classes Jim Cromie

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