From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: David Miller <davem@davemloft.net>
Cc: rdunlap@infradead.org, pieter@boesman.nl, josh@joshtriplett.org,
alexander.h.duyck@intel.com, viro@zeniv.linux.org.uk,
ast@plumgrid.com, akpm@linux-foundation.org, beber@meleeweb.net,
catalina.mocanu@gmail.com, dborkman@redhat.com,
edumazet@google.com, ebiederm@xmission.com, fabf@skynet.be,
fuse-devel@lists.sourceforge.net, geert@linux-m68k.org,
hughd@google.com, iulia.manda21@gmail.com, JBeulich@suse.com,
bfields@fieldses.org, jlayton@poochiereds.net,
linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org,
mcgrof@suse.com, mattst88@gmail.com, mgorman@suse.de,
mst@redhat.com, miklos@szeredi.hu, netdev@vger.kernel.org,
oleg@redhat.com, Paul.Durrant@citrix.com, pefoley2@pefoley.com,
tgraf@suug.ch, therbert@google.com,
trond.myklebust@primarydata.com, willemb@google.com,
xiaoguangrong@linux.vnet.ibm.com, zhenglong
Subject: Re: [PATCH v4 0/7] kernel tinification: optionally compile out splice family of syscalls (splice, vmsplice, tee and sendfile)
Date: Tue, 25 Nov 2014 10:10:32 -0800 [thread overview]
Message-ID: <20141125181032.GJ5050@linux.vnet.ibm.com> (raw)
In-Reply-To: <20141125.121305.2094097848188324942.davem@davemloft.net>
On Tue, Nov 25, 2014 at 12:13:05PM -0500, David Miller wrote:
> From: Randy Dunlap <rdunlap@infradead.org>
> Date: Tue, 25 Nov 2014 08:17:58 -0800
>
> > Is the splice family of syscalls the only one that tiny has identified
> > for optional building or can we expect similar treatment for other
> > syscalls?
> >
> > Why will many embedded systems not need these syscalls? You know
> > exactly what apps they run and you are positive that those apps do
> > not use splice?
>
> I think starting to compile out system calls is a very slippery
> slope we should not begin the journey down.
>
> This changes the forward facing interface to userspace.
I certainly sympathize with this concern, given the importance of software
portability. However, the tiny-hardware alternative appears ot some sort
of special-purpose embedded OS, which most definitely will suffer from
software compatibility issues. I guess that the good news is that much
of the tiny hardware that used to be 8 or 16 bits is now 32 bits, which
means that it has at least some chance of running some form of Linux. ;-)
Thanx, Paul
next prev parent reply other threads:[~2014-11-25 18:10 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-24 23:00 [PATCH v4 0/7] kernel tinification: optionally compile out splice family of syscalls (splice, vmsplice, tee and sendfile) Pieter Smith
2014-11-24 23:01 ` [PATCH v4 1/7] fs: move sendfile syscall into fs/splice Pieter Smith
2014-11-24 23:01 ` [PATCH v4 2/7] fs: moved kernel_write to fs/read_write Pieter Smith
2014-11-24 23:01 ` [PATCH v4 3/7] fs/splice: support compiling out splice-family syscalls Pieter Smith
2014-11-25 0:49 ` Josh Triplett
2014-11-24 23:01 ` [PATCH v4 4/7] fs/fuse: support compiling out splice Pieter Smith
2014-11-24 23:01 ` [PATCH v4 5/7] fs/nfsd: " Pieter Smith
[not found] ` <1416870079-15254-1-git-send-email-pieter-qeJ+1H9vRZbz+pZb47iToQ@public.gmane.org>
2014-11-24 23:01 ` [PATCH v4 6/7] net/core: " Pieter Smith
2014-11-24 23:01 ` [PATCH v4 7/7] fs/splice: full support for " Pieter Smith
2014-11-25 0:52 ` [PATCH v4 0/7] kernel tinification: optionally compile out splice family of syscalls (splice, vmsplice, tee and sendfile) Josh Triplett
[not found] ` <5474ABB6.3030400@infradead.org>
[not found] ` <5474ABB6.3030400-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-11-25 17:13 ` David Miller
2014-11-25 18:10 ` Paul E. McKenney [this message]
2014-11-25 18:24 ` David Miller
[not found] ` <20141125.132445.152609149279137368.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2014-11-25 18:58 ` Theodore Ts'o
[not found] ` <20141125185806.GA28116-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2014-11-25 19:05 ` David Miller
2014-11-25 18:53 ` josh
2014-11-25 19:04 ` David Miller
[not found] ` <20141125.140441.401150380839514113.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2014-11-25 19:16 ` Eric W. Biederman
[not found] ` <87egsr9jkz.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2014-11-25 19:27 ` David Miller
[not found] ` <20141125.142741.1620673255148724338.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2014-11-25 20:01 ` Eric W. Biederman
2014-11-25 20:11 ` Pieter Smith
2014-11-26 12:19 ` One Thousand Gnomes
2014-11-25 19:00 ` josh-iaAMLnmF4UmaiuxdJuQwMA
2014-11-25 22:08 ` josh-iaAMLnmF4UmaiuxdJuQwMA
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