From: Peter Zijlstra <peterz@infradead.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org, Oren Laadan <orenl@cs.columbia.edu>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Alexey Dobriyan <adobriyan@gmail.com>,
Pavel Emelyanov <xemul@openvz.org>, Andrew Morton <akpm@osdl.org>,
torvalds@linux-foundation.org, mikew@google.com, mingo@elte.hu,
hpa@zytor.com, Nathan Lynch <nathanl@austin.ibm.com>,
container@us.ibm.com, sukadev@us.ibm.com
Subject: Re: [RFC][v6][PATCH 0/9] clone_with_pids() syscall
Date: Fri, 11 Sep 2009 13:40:05 +0200 [thread overview]
Message-ID: <1252669205.7126.23.camel@laptop> (raw)
In-Reply-To: <200909111334.45241.arnd@arndb.de>
On Fri, 2009-09-11 at 13:34 +0200, Arnd Bergmann wrote:
> On Friday 11 September 2009, Peter Zijlstra wrote:
> > If you then get passed a longer clone_struct than you know about, all is
> > well IFF the tail is 0, otherwise fail with -E2BIG.
> >
> > If you get passed a short clone_struct, zero out the tail.
>
> I would leave out the size argument. We can put a few reserved fields
> and flag bits in there for possible extensions, but if we ever run out
> of these, just define a new syscall.
Why? If we can avoid this new syscall isn't that nicer?
> Also, if you're passing a struct, why not put nr_pids in there, and
> replace clone_pid_struct with a simple array? That would give us
Sure..
next prev parent reply other threads:[~2009-09-11 11:41 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-10 6:06 [RFC][v6][PATCH 0/9] clone_with_pids() syscall Sukadev Bhattiprolu
2009-09-10 6:08 ` [RFC][v6][PATCH 1/9]: Factor out code to allocate pidmap page Sukadev Bhattiprolu
2009-09-10 6:09 ` [RFC][v6][PATCH 2/9]: Have alloc_pidmap() return actual error code Sukadev Bhattiprolu
2009-09-10 6:09 ` [RFC][v6][PATCH 3/9] Make pid_max a pid_ns property Sukadev Bhattiprolu
2009-09-10 6:09 ` [RFC][v6][PATCH 4/9]: Add target_pid parameter to alloc_pidmap() Sukadev Bhattiprolu
2009-09-10 6:10 ` [RFC][v6][PATCH 5/9]: Add target_pids parameter to alloc_pid() Sukadev Bhattiprolu
2009-09-10 6:11 ` [RFC][v6][PATCH 6/9]: Add target_pids parameter to copy_process() Sukadev Bhattiprolu
[not found] ` <20090910060627.GA24343-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-09-10 6:11 ` Sukadev Bhattiprolu
2009-09-10 6:12 ` [RFC][v6][PATCH 7/9]: Define do_fork_with_pids() Sukadev Bhattiprolu
2009-09-10 6:13 ` [RFC][v6][PATCH 8/9]: Define clone_with_pids() syscall Sukadev Bhattiprolu
2009-09-10 6:14 ` [RFC][v6][PATCH 9/9]: Document " Sukadev Bhattiprolu
2009-09-10 6:12 ` [RFC][v6][PATCH 7/9]: Define do_fork_with_pids() Sukadev Bhattiprolu
[not found] ` <20090910061227.GF25883-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-09-10 7:05 ` Arnd Bergmann
2009-09-10 7:05 ` Arnd Bergmann
[not found] ` <200909100905.35817.arnd-r2nGTMty4D4@public.gmane.org>
2009-09-10 21:29 ` Sukadev Bhattiprolu
2009-09-10 21:29 ` Sukadev Bhattiprolu
2009-09-10 6:13 ` [RFC][v6][PATCH 8/9]: Define clone_with_pids() syscall Sukadev Bhattiprolu
[not found] ` <20090910061301.GG25883-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-09-10 7:31 ` Arnd Bergmann
2009-09-10 7:31 ` Arnd Bergmann
[not found] ` <200909100931.25585.arnd-r2nGTMty4D4@public.gmane.org>
2009-09-10 21:28 ` Sukadev Bhattiprolu
2009-09-10 21:28 ` Sukadev Bhattiprolu
[not found] ` <20090910212837.GA31459-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-09-11 10:31 ` Arnd Bergmann
2009-09-11 10:31 ` Arnd Bergmann
[not found] ` <200909111231.30495.arnd-r2nGTMty4D4@public.gmane.org>
2009-09-11 11:00 ` Louis Rilling
2009-09-11 11:00 ` Louis Rilling
2009-09-11 11:12 ` Arnd Bergmann
[not found] ` <20090911110056.GA12824-Hu8+6S1rdjywhHL9vcZdMVaTQe2KTcn/@public.gmane.org>
2009-09-11 11:12 ` Arnd Bergmann
2009-09-10 6:14 ` [RFC][v6][PATCH 9/9]: Document " Sukadev Bhattiprolu
[not found] ` <20090910061413.GH25883-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-09-10 15:26 ` Randy Dunlap
2009-09-10 15:26 ` Randy Dunlap
2009-09-10 16:31 ` Sukadev Bhattiprolu
[not found] ` <20090910082659.033ab8fd.randy.dunlap-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2009-09-10 16:31 ` Sukadev Bhattiprolu
2009-09-11 11:22 ` [RFC][v6][PATCH 0/9] " Peter Zijlstra
2009-09-11 11:34 ` Arnd Bergmann
2009-09-11 11:40 ` Peter Zijlstra [this message]
2009-09-11 11:50 ` Arnd Bergmann
2009-09-11 16:47 ` Sukadev Bhattiprolu
2009-09-11 17:00 ` Peter Zijlstra
2009-09-12 17:19 ` Sukadev Bhattiprolu
2009-09-13 14:36 ` Arnd Bergmann
2009-09-14 7:14 ` Peter Zijlstra
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