From: Hajime Tazaki <tazaki@wide.ad.jp>
To: richard@nod.at
Cc: linux-arch@vger.kernel.org, arnd@arndb.de, corbet@lwn.net,
cl@linux.com, penberg@kernel.org, rientjes@google.com,
iamjoonsoo.kim@lge.com, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
netdev@vger.kernel.org, linux-mm@kvack.org, jdike@addtoit.com,
rusty@rustcorp.com.au, mathieu.lacage@gmail.com
Subject: Re: [RFC PATCH 00/11] an introduction of library operating system for Linux (LibOS)
Date: Fri, 27 Mar 2015 15:34:40 +0900 [thread overview]
Message-ID: <m28uejaqyn.wl@wide.ad.jp> (raw)
In-Reply-To: <5514560A.7040707@nod.at>
Hi Richard,
At Thu, 26 Mar 2015 19:55:06 +0100,
Richard Weinberger wrote:
> >> feeling that "lib" is the wrong name.
> >> It has not much do to with an architecture.
> >
> > could you care to elaborate your feeling more explicitly ?
> >
> > what is an architecture here and what is _not_ an
> > architecture ?
> > is UML an architecture in your sense (probably yes, but why)?
>
> UML is an architecture as it binds the whole kernel to a computer
> interface. Linux userspace in that case.
>
> > and what is arch/lib missing for an architecture ?
>
> Your arch/lib does not bind the Linux kernel to an interface.
> It takes some part of Linux and duplicates kernel core subsystems
> to make that part work on its own.
> For example arch/lib contains a stub implementation of core VFS
> functions like register_filesystem().
> Also it does not seem to use the kernel scheduler, you have your own.
the scheduler is the part of which a library user (NUSE or
DCE) should implement.
> This also infers that arch/lib will be broken most of the time as
> every time the networking stack references a new symbol it
> has to be duplicated into arch/lib.
>
> But this does not mean that your idea is bad, all I want to say that
> I'm not sure whether arch/lib is the right approach.
> Maybe Arnd has a better idea.
one way to avoid the duplication is: to put our
libos-specific implementation to the kernel core
subsystem. Maybe this will introduce a bunch of #ifdefs
(ifdef CONFIG_LIB) into cores, which I don't know it's okay
or not.
for example, add_timer() is implemented in arch/lib/timer.c
while in kernel/time/timer.c in kernel core.
# [04/11] to [08/11] of my RFC patches are these parts.
We've been implemented these stubs (we call 'kernel glue
code') into arch/lib because 1) we were in out-of-tree and
2) this won't disturb kernel core.
OTOH, [03/11] (and [09/11] and [10/11]) is an original part
of libos, which probably have no conflict (in terms of the
concept) to the others. I'm still thinking arch/lib is an
appropriate place.
> >> You don't implement an architecture, you take some part of Linux
> >> (the networking stack) and create stubs around it to make it work.
> >> That means that we'd also have to duplicate kernel functions into
> >> arch/lib to keep it running.
> >
> > again, the above same questions.
> >
> > it (arch/lib) is a hardware-independent architecture which
> > provides necessary features to the remainder of kernel code,
> > isn't it ?
>
> The stuff in arch/ is the code to glue the kernel to
> a specific piece of hardware.
> Your code does something between. You duplicate kernel core features
> to make a specific piece of code work in userland.
indeed, 'something between' would be an appropriate word.
thank you for your comment.
-- Hajime
next prev parent reply other threads:[~2015-03-27 6:34 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-24 13:10 [RFC PATCH 00/11] an introduction of library operating system for Linux (LibOS) Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 01/11] sysctl: make some functions unstatic to access by arch/lib Hajime Tazaki
2015-03-24 16:13 ` Joe Perches
2015-03-25 15:31 ` Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 02/11] slab: add private memory allocator header for arch/lib Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 03/11] lib: public headers and API implementations for userspace programs Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 04/11] lib: memory management (kernel glue code) Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 05/11] lib: time handling " Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 06/11] lib: context and scheduling " Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 07/11] lib: sysctl " Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 08/11] lib: other kernel glue layer code Hajime Tazaki
2015-03-29 18:17 ` Richard Weinberger
2015-03-31 7:36 ` Hajime Tazaki
2015-04-03 1:24 ` Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 09/11] lib: asm-generic files Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 10/11] lib: libos build scripts and documentation Hajime Tazaki
2015-03-24 13:10 ` [RFC PATCH 11/11] lib: tools used for test scripts Hajime Tazaki
2015-03-24 13:21 ` [RFC PATCH 00/11] an introduction of library operating system for Linux (LibOS) Richard Weinberger
2015-03-24 14:25 ` Hajime Tazaki
2015-03-24 14:32 ` Richard Weinberger
2015-03-24 15:24 ` Hajime Tazaki
2015-03-24 15:27 ` Richard Weinberger
2015-03-25 14:48 ` Hajime Tazaki
2015-03-25 22:50 ` Richard Weinberger
2015-03-26 16:24 ` Hajime Tazaki
2015-03-26 18:55 ` Richard Weinberger
2015-03-27 3:31 ` Rusty Russell
2015-03-27 3:49 ` Geert Uytterhoeven
2015-03-27 5:52 ` Richard Weinberger
2015-03-27 6:05 ` Hajime Tazaki
2015-03-27 6:34 ` Hajime Tazaki [this message]
2015-03-27 9:21 ` Richard Weinberger
2015-03-27 15:17 ` Antti Kantee
2015-03-28 21:17 ` Richard Weinberger
2015-03-29 15:36 ` Hajime Tazaki
2015-03-29 16:47 ` Richard Weinberger
2015-03-29 16:59 ` Antti Kantee
2015-03-29 18:05 ` Richard Weinberger
2015-03-29 15:06 ` Hajime Tazaki
2015-03-30 6:41 ` Richard Weinberger
2015-03-31 7:47 ` Hajime Tazaki
2015-04-09 8:36 ` Richard Weinberger
2015-04-14 3:20 ` Hajime Tazaki
2015-04-01 1:29 ` Rusty Russell
2015-04-03 1:43 ` Hajime Tazaki
2015-04-07 1:25 ` Rusty Russell
2015-04-17 9:36 ` [RFC PATCH v2 " Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 01/11] sysctl: make some functions unstatic to access by arch/lib Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 02/11] slab: add private memory allocator header for arch/lib Hajime Tazaki
2015-04-17 12:17 ` Christoph Lameter
2015-04-17 12:44 ` Richard Weinberger
2015-04-17 15:02 ` Hajime Tazaki
2015-04-17 15:08 ` Richard Weinberger
2015-04-17 15:27 ` Hajime Tazaki
2015-04-17 22:26 ` Christoph Lameter
2015-04-17 9:36 ` [RFC PATCH v2 03/11] lib: public headers and API implementations for userspace programs Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 04/11] lib: memory management (kernel glue code) Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 05/11] lib: time handling " Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 06/11] lib: context and scheduling " Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 07/11] lib: sysctl " Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 08/11] lib: other kernel glue layer code Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 09/11] lib: asm-generic files Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 10/11] lib: libos build scripts and documentation Hajime Tazaki
2015-04-17 9:36 ` [RFC PATCH v2 11/11] lib: tools used for test scripts Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 00/10] an introduction of library operating system for Linux (LibOS) Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 01/10] sysctl: make some functions unstatic to access by arch/lib Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 02/10] slab: add SLIB (Library memory allocator) for arch/lib Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 03/10] lib: public headers and API implementations for userspace programs Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 04/10] lib: time handling (kernel glue code) Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 05/10] lib: context and scheduling functions (kernel glue code) for libos Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 06/10] lib: sysctl handling (kernel glue code) Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 07/10] lib: other kernel glue layer code Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 08/10] lib: auxially files for auto-generated asm-generic files of libos Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 09/10] lib: libos build scripts and documentation Hajime Tazaki
2015-04-20 20:43 ` Paul Bolle
2015-04-22 5:33 ` Hajime Tazaki
2015-04-19 13:28 ` [RFC PATCH v3 10/10] lib: tools used for test scripts Hajime Tazaki
2015-04-24 7:40 ` [RFC PATCH v3 00/10] an introduction of library operating system for Linux (LibOS) Richard Weinberger
2015-04-24 8:22 ` Hajime Tazaki
2015-04-24 8:59 ` Richard Weinberger
2015-04-24 9:50 ` Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 00/10] an introduction of Linux library operating system (LibOS) Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 01/10] sysctl: make some functions unstatic to access by arch/lib Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 02/10] slab: add SLIB (Library memory allocator) for arch/lib Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 03/10] lib: public headers and API implementations for userspace programs Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 04/10] lib: time handling (kernel glue code) Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 05/10] lib: context and scheduling functions (kernel glue code) for libos Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 06/10] lib: sysctl handling (kernel glue code) Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 07/10] lib: other kernel glue layer code Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 08/10] lib: auxially files for auto-generated asm-generic files of libos Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 09/10] lib: libos build scripts and documentation Hajime Tazaki
2015-04-27 3:00 ` [PATCH v4 10/10] lib: tools used for test scripts Hajime Tazaki
2015-04-27 7:29 ` [PATCH v4 00/10] an introduction of Linux library operating system (LibOS) Richard Weinberger
2015-04-27 7:39 ` Richard Weinberger
2015-04-29 23:16 ` Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 " Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 01/10] sysctl: make some functions unstatic to access by arch/lib Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 02/10] slab: add SLIB (Library memory allocator) for arch/lib Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 03/10] lib: public headers and API implementations for userspace programs Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 04/10] lib: time handling (kernel glue code) Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 05/10] lib: context and scheduling functions (kernel glue code) for libos Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 06/10] lib: sysctl handling (kernel glue code) Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 07/10] lib: other kernel glue layer code Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 08/10] lib: auxiliary files for auto-generated asm-generic files of libos Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 09/10] lib: libos build scripts and documentation Hajime Tazaki
2015-05-13 5:28 ` [PATCH v5 10/10] lib: tools used for test scripts Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 00/10] an introduction of Linux library operating system (LibOS) Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 01/10] sysctl: make some functions unstatic to access by arch/lib Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 02/10] slab: add SLIB (Library memory allocator) for arch/lib Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 03/10] lib: public headers and API implementations for userspace programs Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 04/10] lib: time handling (kernel glue code) Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 05/10] lib: context and scheduling functions (kernel glue code) for libos Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 06/10] lib: sysctl handling (kernel glue code) Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 07/10] lib: other kernel glue layer code Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 08/10] lib: auxiliary files for auto-generated asm-generic files of libos Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 09/10] lib: libos build scripts and documentation Hajime Tazaki
2015-09-03 14:16 ` [PATCH v6 10/10] lib: tools used for test scripts Hajime Tazaki
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