From: Arnd Bergmann <arnd@arndb.de>
To: Oren Laadan <orenl@librato.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org,
Containers <containers@lists.linux-foundation.org>,
Nathan Lynch <nathanl@austin.ibm.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
hpa@zytor.com, mingo@elte.hu, torvalds@linux-foundation.org,
Alexey Dobriyan <adobriyan@gmail.com>,
Pavel Emelyanov <xemul@openvz.org>
Subject: Re: [RFC][v7][PATCH 0/9] Implement clone2() system call
Date: Fri, 25 Sep 2009 00:21:03 +0200 [thread overview]
Message-ID: <200909250021.03535.arnd@arndb.de> (raw)
In-Reply-To: <4ABBED72.9080901@librato.com>
On Friday 25 September 2009, Oren Laadan wrote:
> In this form, you place a constraints on where userspace may
> place the {parent,child}_tid variable, and require that this
> particular clone_struct remain valid memory in the parent until
> the child terminates. This may break existing programs that
> use this (threads libraries ?)
No existing program uses sys_clone2, and the kernel function
may well differ from the user space calling conventions, which
are not bound by the six-argument limitation.
So a clone2 library call could set up the structure with the
arguments to the real syscall, call into the kernel and
copy the output data back into the pointers it was given by
the user.
Arnd <><
next prev parent reply other threads:[~2009-09-24 22:21 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-24 16:55 [RFC][v7][PATCH 0/9] Implement clone2() system call Sukadev Bhattiprolu
2009-09-24 17:00 ` [RFC][v7][PATCH 1/9]: Factor out code to allocate pidmap page Sukadev Bhattiprolu
2009-09-24 17:00 ` [RFC][v7][PATCH 2/9]: Have alloc_pidmap() return actual error code Sukadev Bhattiprolu
2009-09-24 17:01 ` [RFC][v7][PATCH 3/9] Make pid_max a pid_ns property Sukadev Bhattiprolu
2009-09-24 17:45 ` Oren Laadan
2009-09-24 17:01 ` [RFC][v7][PATCH 4/9]: Add target_pid parameter to alloc_pidmap() Sukadev Bhattiprolu
2009-09-24 17:47 ` Oren Laadan
2009-09-24 17:01 ` [RFC][v7][PATCH 5/9]: Add target_pids parameter to alloc_pid() Sukadev Bhattiprolu
2009-09-24 17:02 ` [RFC][v7][PATCH 6/9]: Add target_pids parameter to copy_process() Sukadev Bhattiprolu
2009-09-24 17:02 ` [RFC][v7][PATCH 7/9]: Define do_fork_with_pids() Sukadev Bhattiprolu
2009-09-24 17:03 ` [RFC][v7][PATCH 8/9]: Define clone2() syscall Sukadev Bhattiprolu
2009-09-24 21:43 ` Arnd Bergmann
2009-09-25 8:23 ` Louis Rilling
2009-09-25 10:56 ` Louis Rilling
2009-09-29 18:05 ` Sukadev Bhattiprolu
2009-09-29 18:40 ` Roland McGrath
2009-09-29 18:44 ` H. Peter Anvin
2009-09-29 19:02 ` Arjan van de Ven
2009-09-29 19:10 ` Linus Torvalds
2009-09-29 20:02 ` H. Peter Anvin
2009-09-29 22:11 ` Linus Torvalds
2009-09-29 22:19 ` H. Peter Anvin
2009-09-30 16:15 ` Arnd Bergmann
2009-09-30 16:27 ` Linus Torvalds
2009-09-30 17:59 ` Arnd Bergmann
2009-09-30 19:14 ` Linus Torvalds
2009-09-30 6:48 ` Roland McGrath
2009-09-29 20:00 ` H. Peter Anvin
2009-09-29 21:58 ` Oren Laadan
2009-09-24 17:03 ` [RFC][v7][PATCH 9/9]: Document " Sukadev Bhattiprolu
2009-09-24 18:05 ` Randy Dunlap
2009-09-25 2:31 ` KOSAKI Motohiro
2009-09-24 17:44 ` [RFC][v7][PATCH 0/9] Implement clone2() system call Oren Laadan
2009-09-24 20:15 ` Sukadev Bhattiprolu
2009-09-24 22:06 ` Oren Laadan
2009-09-24 22:21 ` Arnd Bergmann [this message]
2009-09-24 23:19 ` Oren Laadan
2009-10-01 2:36 ` Sukadev Bhattiprolu
2009-10-01 15:19 ` Oren Laadan
2009-09-24 17:57 ` Alexey Dobriyan
2009-09-24 18:35 ` Serge E. Hallyn
2009-09-30 5:34 ` Alexey Dobriyan
2009-09-30 17:41 ` Oren Laadan
2009-10-02 20:27 ` Alexey Dobriyan
2009-10-02 21:06 ` Oren Laadan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200909250021.03535.arnd@arndb.de \
--to=arnd@arndb.de \
--cc=adobriyan@gmail.com \
--cc=containers@lists.linux-foundation.org \
--cc=ebiederm@xmission.com \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=nathanl@austin.ibm.com \
--cc=orenl@librato.com \
--cc=sukadev@linux.vnet.ibm.com \
--cc=torvalds@linux-foundation.org \
--cc=xemul@openvz.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox