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From: Petr Mladek <pmladek@suse.com>
To: jim.cromie@gmail.com
Cc: Jason Baron <jbaron@akamai.com>,
	LKML <linux-kernel@vger.kernel.org>,
	akpm@linuxfoundation.org, Greg KH <gregkh@linuxfoundation.org>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>
Subject: Re: [PATCH v2 19/24] dyndbg: accept query terms like module:foo and file=bar
Date: Wed, 17 Jun 2020 14:11:58 +0200	[thread overview]
Message-ID: <20200617121156.GV31238@alley> (raw)
In-Reply-To: <CAJfuBxwmMNzt6ffQkYX7vU1qRa12=mCbO9T4SMzF7RXV5UwkYQ@mail.gmail.com>

On Tue 2020-06-16 14:08:57, jim.cromie@gmail.com wrote:
> On Tue, Jun 16, 2020 at 5:57 AM Petr Mladek <pmladek@suse.com> wrote:
> >
> > On Sat 2020-06-13 09:57:33, Jim Cromie wrote:
> > > Current code expects "keyword" "arg" as 2 space separated words.
> > > Change to also accept "keyword:arg" and "keyword=arg" forms as well,
> > > and drop !(nwords%2) requirement.
> > >
> > > Then in rest of function, use new keyword,arg variables instead of
> > > word[i],word[i+1]
> >
> > I like the idea. But please allow only one form. IMHO, parameter=value
> > is a common way to pass values to commandline parameters.
> >
> 
> I dont see a basis to prefer one over the other.
> we already now accept  " file   foo.c:func "
> that might argue for file=foo:func
> but file:foo:func is what youd expect reading left-to-right
> 
> > Note that "keyword" and "arg" is strange naming, especially "arg".
> >
> 
> I think keyword is clear in context. query_term is suitable, but no better.
> 
> arg is pretty generic, without overloaded meaning like value ( like
> lvalue ? rvalue ?)
> almost as old as 'i', but generally a string (not an int)
> Is there an alternative you favor ?

You made to do some research and I was wrong. For example, getopt()
operates with options and their arguments. So, 'keyword' and 'arg' names
look good after all.

Well, I still think that only one syntax should be supported. And it
is better to distinguish keywords and arguments, so I prefer keyword=arg.

I see "filename:func" or "filename:line" as a compound parameter. People are
familiar with this syntax, for example, from gdb.

But using '=' is very common for first level delimiter: getopt,
qemu.

Well, I do not have strong opinion on this.

Best Regards,
Petr

  reply	other threads:[~2020-06-17 12:12 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
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 [this message]
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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