From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: David Laight <David.Laight@aculab.com>
Cc: 'Petr Mladek' <pmladek@suse.com>, Marco Elver <elver@google.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kasan-dev@googlegroups.com" <kasan-dev@googlegroups.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Steven Rostedt <rostedt@goodmis.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH v2 2/3] lib/vsprintf: Split out sprintf() and friends
Date: Thu, 10 Aug 2023 16:13:32 +0300 [thread overview]
Message-ID: <ZNTifGaJdQ588/B5@smile.fi.intel.com> (raw)
In-Reply-To: <900a99a7c90241698c8a2622ca20fa96@AcuMS.aculab.com>
On Wed, Aug 09, 2023 at 08:48:54AM +0000, David Laight wrote:
> ...
> > If you split headers into so many small pieces then all
> > source files will start with 3 screens of includes. I do not see
> > how this helps with maintainability.
>
> You also slow down compilations.
Ingo's patches showed the opposite. Do you have actual try and numbers?
> A few extra definitions in a 'leaf' header (one without any
> #includes) don't really matter.
> If a header includes other 'leaf' headers that doesn't matter
> much.
>
> But the deep include chains caused by a low level header
> including a main header are what causes pretty much every
> header to get included in every compilation.
>
> Breaking the deep chains is probably more useful than
> adding leaf headers for things that are in a header pretty
> much everything in going to include anyway.
>
> The is probably scope for counting the depth of header
> includes by looking at what each header includes.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2023-08-10 13:20 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-05 17:50 [PATCH v2 0/3] lib/vsprintf: Rework header inclusions Andy Shevchenko
2023-08-05 17:50 ` [PATCH v2 1/3] lib/vsprintf: Sort headers alphabetically Andy Shevchenko
2023-08-07 14:31 ` Petr Mladek
2023-08-07 14:53 ` Sergey Senozhatsky
2023-08-07 15:00 ` Andy Shevchenko
2023-08-07 14:58 ` Andy Shevchenko
2023-08-07 19:47 ` Rasmus Villemoes
2023-08-14 15:33 ` Petr Mladek
2023-08-05 17:50 ` [PATCH v2 2/3] lib/vsprintf: Split out sprintf() and friends Andy Shevchenko
2023-08-05 18:43 ` Andrew Morton
2023-08-05 21:31 ` Andy Shevchenko
2023-08-08 12:55 ` Andy Shevchenko
2023-08-07 15:03 ` Petr Mladek
2023-08-07 15:09 ` Andy Shevchenko
2023-08-07 15:11 ` Andy Shevchenko
2023-08-07 15:13 ` Andy Shevchenko
2023-08-08 6:41 ` Petr Mladek
2023-08-08 12:47 ` Andy Shevchenko
2023-08-10 8:15 ` Petr Mladek
2023-08-10 9:09 ` Rasmus Villemoes
2023-08-10 13:17 ` Andy Shevchenko
2023-08-10 14:17 ` Rasmus Villemoes
2023-08-11 19:28 ` Steven Rostedt
2023-08-14 11:16 ` Andy Shevchenko
2023-08-14 15:16 ` Petr Mladek
2023-08-15 9:58 ` David Laight
2023-08-09 8:48 ` David Laight
2023-08-10 13:13 ` Andy Shevchenko [this message]
2023-08-14 8:12 ` David Laight
2023-08-14 12:28 ` 'Andy Shevchenko'
2023-08-08 2:24 ` Steven Rostedt
2023-08-08 12:49 ` Andy Shevchenko
2023-08-07 19:31 ` Rasmus Villemoes
2023-08-08 11:17 ` David Laight
2023-08-05 17:50 ` [PATCH v2 3/3] lib/vsprintf: Declare no_hash_pointers in sprintf.h Andy Shevchenko
2023-08-07 6:00 ` Marco Elver
2023-08-07 15:06 ` Petr Mladek
2023-08-07 15:27 ` Andy Shevchenko
2023-08-14 15:38 ` [PATCH v2 0/3] lib/vsprintf: Rework header inclusions Petr Mladek
2023-08-14 16:11 ` Andy Shevchenko
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