From: Joel Fernandes <joel@joelfernandes.org>
To: Daniel Colascione <dancol@google.com>
Cc: Karim Yaghmour <karim.yaghmour@opersys.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Greg KH <gregkh@linuxfoundation.org>,
Christoph Hellwig <hch@infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
ast@kernel.org, atish patra <atishp04@gmail.com>,
Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@redhat.com>,
Jan Kara <jack@suse.cz>, Jonathan Corbet <corbet@lwn.net>,
Kees Cook <keescook@chromium.org>,
kernel-team@android.com,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
Manoj Rao <linux@manojrajarao.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Randy Dunlap <rdunlap@infradead.org>,
rostedt@goodmis.org, Thomas Gleixner <tglx@linutronix.de>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>,
yhs@fb.com
Subject: Re: [RFC] Provide in-kernel headers for making it easy to extend the kernel
Date: Thu, 24 Jan 2019 09:18:20 -0500 [thread overview]
Message-ID: <20190124141820.GA75378@google.com> (raw)
In-Reply-To: <20190124023216.GA75730@google.com>
On Wed, Jan 23, 2019 at 09:32:16PM -0500, Joel Fernandes wrote:
> On Wed, Jan 23, 2019 at 02:37:47PM -0800, Daniel Colascione wrote:
> > On Wed, Jan 23, 2019 at 1:29 PM Karim Yaghmour
> > <karim.yaghmour@opersys.com> wrote:
> [...]
> > > Personally I advocated a more aggressive approach with Joel in private:
> > > just put the darn headers straight into the kernel image, it's the
> > > *only* artifact we're sure will follow the Android device whatever
> > > happens to it (like built-in ftrace).
> >
> > I was thinking along similar lines. Ordinarily, we make loadable
> > kernel modules. What we kind of want here is a non-loadable kernel
> > module --- or a non-loadable section in the kernel image proper. I'm
> > not familiar with early-stage kernel loader operation: I know it's
> > possible to crease discardable sections in the kernel image, but can
> > we create sections that are never slurped into memory in the first
> > place? If not, maybe loading and immediately discarding the header
> > section is good enough.
>
> I am happy to see if I can shrink it down further. Especially using xz and
> stripping all comments period. I am optimistic this can be brought down
> further to a point where it would make sense to everyone to build it into the
> kernel. Lets see.
>
> Last time I stripped comments, it went down by ~40%. What I haven't tried is
> doing this *with* xz compression. I am also open to brainstorming what else
> can be stripped.
Removing comments (/* */) with xz compression brings it down to 3.3MB.
thanks,
- Joel
next prev parent reply other threads:[~2019-01-24 14:18 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-18 22:55 [RFC] Provide in-kernel headers for making it easy to extend the kernel Joel Fernandes
2019-01-19 8:25 ` Greg KH
2019-01-19 16:27 ` Joel Fernandes
2019-01-19 17:43 ` Daniel Colascione
2019-01-19 23:25 ` Joel Fernandes
2019-01-19 23:44 ` hpa
2019-01-20 15:58 ` Joel Fernandes
2019-03-06 23:09 ` Pavel Machek
2019-03-06 23:37 ` Daniel Colascione
2019-03-07 0:07 ` H. Peter Anvin
2019-03-07 0:33 ` Daniel Colascione
2019-03-07 1:22 ` Enrico Weigelt, metux IT consult
2019-03-07 1:49 ` Daniel Colascione
2019-03-07 20:41 ` Enrico Weigelt, metux IT consult
2019-03-07 20:55 ` Greg KH
2019-03-07 22:11 ` Enrico Weigelt, metux IT consult
2019-03-07 23:12 ` Joel Fernandes
2019-03-07 23:40 ` hpa
2019-03-08 3:16 ` Joel Fernandes
2019-03-07 1:42 ` Joel Fernandes
2019-03-07 16:24 ` Enrico Weigelt, metux IT consult
2019-03-07 0:32 ` H. Peter Anvin
2019-03-07 0:36 ` Daniel Colascione
2019-03-07 0:42 ` Enrico Weigelt, metux IT consult
2019-03-07 1:48 ` Joel Fernandes
2019-03-07 17:37 ` Enrico Weigelt, metux IT consult
2019-01-19 8:26 ` Greg KH
2019-01-19 16:27 ` Joel Fernandes
2019-01-19 10:28 ` Christoph Hellwig
2019-01-19 10:36 ` Greg KH
2019-01-19 16:26 ` Joel Fernandes
2019-01-20 7:01 ` hpa
2019-01-20 16:10 ` Joel Fernandes
2019-01-20 21:58 ` hpa
2019-01-21 1:45 ` Joel Fernandes
2019-01-21 2:49 ` hpa
2019-01-21 4:38 ` Sandeep Patil
2019-01-22 13:39 ` Joel Fernandes
2019-01-23 21:29 ` Karim Yaghmour
2019-01-23 22:37 ` Daniel Colascione
2019-01-24 2:32 ` Joel Fernandes
2019-01-24 14:18 ` Joel Fernandes [this message]
2019-01-24 18:57 ` Karim Yaghmour
2019-01-24 20:59 ` Joel Fernandes
2019-01-25 19:00 ` hpa
2019-01-25 19:15 ` Daniel Colascione
2019-01-25 19:51 ` hpa
2019-01-25 20:34 ` Daniel Colascione
2019-01-25 20:46 ` Joel Fernandes
2019-01-25 20:28 ` Joel Fernandes
2019-03-06 23:09 ` Pavel Machek
2019-03-06 23:35 ` H. Peter Anvin
2019-01-26 12:05 Norbert Lange
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