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From: Greg KH <gregkh@linuxfoundation.org>
To: "Enrico Weigelt, metux IT consult" <lkml@metux.net>
Cc: Joel Fernandes <joel@joelfernandes.org>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Alexei Starovoitov <ast@kernel.org>,
	atish patra <atishp04@gmail.com>,
	Daniel Colascione <dancol@google.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Guenter Roeck <groeck@chromium.org>,
	Jonathan Corbet <corbet@lwn.net>,
	Karim Yaghmour <karim.yaghmour@opersys.com>,
	Kees Cook <keescook@chromium.org>,
	Android Kernel Team <kernel-team@android.com>,
	"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
	"open list:KERNEL SELFTEST FRAMEWORK" 
	<linux-kselftest@vger.kernel.org>,
	linux-trace-devel@vger.kernel.org,
	Manoj Rao <linux@manojrajarao.com>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Qais Yousef <qais.yousef@arm.com>,
	Randy Dunlap <rdunlap@infradead.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Shuah Khan <shuah@kernel.org>, Yonghong Song <yhs@fb.com>
Subject: Re: [PATCH v4 1/2] Provide in-kernel headers for making it easy to extend the kernel
Date: Fri, 8 Mar 2019 15:04:49 +0100	[thread overview]
Message-ID: <20190308140449.GD25768@kroah.com> (raw)
In-Reply-To: <05942dfd-b05d-0a26-f8e4-85e2a73b8feb@metux.net>

On Fri, Mar 08, 2019 at 02:57:24PM +0100, Enrico Weigelt, metux IT consult wrote:
> On 08.03.19 14:42, Joel Fernandes wrote:
> 
> Hi folks,
> 
> > That sounds like it could be useful. I don't see any reason off the
> > top why that would not be possible to add to the list of archived
> > files in the future. The patch allows populating the list of files
> > from Kbuild using ikh_file_list variable.
> 
> It seems the whole thing's going into a direction where a whole own
> subtopic is coming up: compressed built-in filesystem.
> 
> Haven't had a deeper thought about it yet, whether or not existing
> filesystems like squashfs, initramfs, etc are the right thing for that,
> or something new should be invented, but a generic mechanism for
> compiled-in compressed (ro) filesystems could also be interesting
> for very small devices, that perhaps even dont need any persistence.
> 
> Some requirements coming up in mind:
> 
> 1. it shall be possible to have any number of instances - possibly by
>    separate modules.
> 2. it shall be possible to use an bootloader/firmware provided image
>    (so it can serve as initrd)
> 2. data should stay compressed as long as possible, but uncompressed
>    data might be cached - do decompression on-demand
> 3. only needs to be ro (write access could be done via unionfs+friends)
> 4. it shall be swappable (if swap is enabled)
> 
> In that scenario, these in-kernel headers would just one consumer,
> I can imagine lots of others.

I too want a pony :)

Until then, I think this feature should not be bikeshedded to death.  It
fits a real need, is simple (modulo the Kbuild interactions), and is
optional for those that do not wish to waste the memory.

thanks,

greg k-h

  reply	other threads:[~2019-03-08 17:05 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-01 16:08 [PATCH v4 1/2] Provide in-kernel headers for making it easy to extend the kernel Joel Fernandes (Google)
2019-03-01 16:08 ` [PATCH v4 2/2] Add selftests for module build using in-kernel headers Joel Fernandes (Google)
2019-03-02 21:59 ` [PATCH v4 1/2] Provide in-kernel headers for making it easy to extend the kernel kbuild test robot
2019-03-03 16:11   ` Joel Fernandes
2019-03-06 12:26     ` Masahiro Yamada
2019-03-06 17:49       ` Joel Fernandes
2019-03-07  4:59         ` Masahiro Yamada
2019-03-07 14:54           ` Joel Fernandes
2019-03-07 23:23       ` Justin Capella
2019-03-06 18:16     ` Joel Fernandes
2019-03-07  4:54       ` Masahiro Yamada
2019-03-03  2:04 ` kbuild test robot
2019-03-04 14:00 ` Qais Yousef
2019-03-05 16:27   ` Joel Fernandes
2019-03-04 22:48 ` Dietmar Eggemann
2019-03-05 16:25   ` Joel Fernandes
2019-03-07  8:58 ` Geert Uytterhoeven
2019-03-07 15:03   ` Joel Fernandes
2019-03-07 15:23     ` Greg KH
2019-03-07 16:54       ` Joel Fernandes
     [not found]       ` <20190318185742.109dee5c@alans-desktop>
2019-03-18 21:11         ` Karim Yaghmour
2019-03-08  8:53     ` Geert Uytterhoeven
2019-03-08 13:42       ` Joel Fernandes
2019-03-08 13:57         ` Enrico Weigelt, metux IT consult
2019-03-08 14:04           ` Greg KH [this message]
2019-03-08 14:02         ` Greg KH
2019-03-08 17:58           ` Joel Fernandes
2019-03-08 17:59           ` Geert Uytterhoeven
2019-03-09  7:16             ` Greg KH
2019-03-09 11:40               ` Geert Uytterhoeven
2019-03-09 12:11                 ` Greg KH
2019-03-09 16:51                   ` Karim Yaghmour
2019-03-09 19:26                     ` Geert Uytterhoeven
2019-03-09 21:44                       ` Karim Yaghmour
2019-03-11  8:03                         ` Geert Uytterhoeven
2019-03-12 15:15                           ` Karim Yaghmour
2019-03-11 23:36                         ` Steven Rostedt
2019-03-11 23:58                           ` Daniel Colascione
2019-03-12  0:39                             ` Joel Fernandes
2019-03-12  1:28                               ` Steven Rostedt
2019-03-12  1:38                                 ` Joel Fernandes
2019-03-13  1:18                                   ` Masami Hiramatsu
2019-03-14 12:27                                     ` Joel Fernandes
2019-03-15 13:14                                       ` Masami Hiramatsu
2019-03-12  1:45                                 ` Alexei Starovoitov
2019-03-12 15:26                                   ` Steven Rostedt
2019-03-12  1:22                             ` Steven Rostedt

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