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From: "Serge E. Hallyn" <serue@us.ibm.com>
To: Oren Laadan <orenl@librato.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@osdl.org>,
	containers@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-api@vger.kernel.org, Dave Hansen <dave@linux.vnet.ibm.com>,
	Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Pavel Emelyanov <xemul@openvz.org>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Subject: Re: [RFC v17][PATCH 16/60] pids 6/7: Define do_fork_with_pids()
Date: Mon, 3 Aug 2009 13:26:40 -0500	[thread overview]
Message-ID: <20090803182640.GB7493@us.ibm.com> (raw)
In-Reply-To: <1248256822-23416-17-git-send-email-orenl@librato.com>

Quoting Oren Laadan (orenl@librato.com):
> From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
...
> +struct target_pid_set {
> +	int num_pids;
> +	pid_t *target_pids;
> +};

Oren, I thought you had decided to add an extended flags field
here, to support additional CLONE_ flags - such as CLONE_TIMENS?

I mention it now because if you're still considering that
long-term, then IMO the syscall should not be called clone_with_pids(),
but clone_extended().  Otherwise, to support new clone flags we'll
either have to use unshare2 (without clone support), or add yet
another clone variant, OR use clone_with_pids() which is a poor name
for something which will likely be used in cases without specifying
pids, but specifying flags not support through any other interface.

-serge

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  reply	other threads:[~2009-08-03 18:26 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-22  9:59 [RFC v17][PATCH 00/60] Kernel based checkpoint/restart Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 01/60] c/r: extend arch_setup_additional_pages() Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 02/60] x86: ptrace debugreg checks rewrite Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 03/60] c/r: break out new_user_ns() Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 04/60] c/r: split core function out of some set*{u,g}id functions Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 05/60] cgroup freezer: Fix buggy resume test for tasks frozen with cgroup freezer Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 06/60] cgroup freezer: Update stale locking comments Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 07/60] cgroup freezer: Add CHECKPOINTING state to safeguard container checkpoint Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 08/60] cgroup freezer: interface to freeze a cgroup from within the kernel Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 09/60] Namespaces submenu Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 10/60] c/r: make file_pos_read/write() public Oren Laadan
2009-07-23  2:33   ` KAMEZAWA Hiroyuki
2009-07-22  9:59 ` [RFC v17][PATCH 11/60] pids 1/7: Factor out code to allocate pidmap page Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 12/60] pids 2/7: Have alloc_pidmap() return actual error code Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 13/60] pids 3/7: Add target_pid parameter to alloc_pidmap() Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 14/60] pids 4/7: Add target_pids parameter to alloc_pid() Oren Laadan
     [not found]   ` <1248256822-23416-15-git-send-email-orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
2009-08-03 18:22     ` Serge E. Hallyn
2009-07-22  9:59 ` [RFC v17][PATCH 16/60] pids 6/7: Define do_fork_with_pids() Oren Laadan
2009-08-03 18:26   ` Serge E. Hallyn [this message]
2009-08-04  8:37     ` Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 17/60] pids 7/7: Define clone_with_pids syscall Oren Laadan
     [not found]   ` <1248256822-23416-18-git-send-email-orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
2009-07-29  0:44     ` Sukadev Bhattiprolu
2009-07-22  9:59 ` [RFC v17][PATCH 18/60] c/r: create syscalls: sys_checkpoint, sys_restart Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 19/60] c/r: documentation Oren Laadan
     [not found]   ` <1248256822-23416-20-git-send-email-orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
2009-07-23 14:24     ` Serge E. Hallyn
2009-07-23 15:24       ` Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 20/60] c/r: basic infrastructure for checkpoint/restart Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 21/60] c/r: x86_32 support " Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 22/60] c/r: external checkpoint of a task other than ourself Oren Laadan
2009-07-22 17:52   ` Serge E. Hallyn
2009-07-23  4:32     ` Oren Laadan
     [not found]       ` <4A67E7D7.9060800-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
2009-07-23 13:12         ` Serge E. Hallyn
2009-07-23 14:14           ` Oren Laadan
2009-07-23 14:54         ` Serge E. Hallyn
2009-07-23 14:47   ` Serge E. Hallyn
2009-07-23 15:33     ` Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 23/60] c/r: export functionality used in next patch for restart-blocks Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 24/60] c/r: restart-blocks Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 25/60] c/r: checkpoint multiple processes Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 26/60] c/r: restart " Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 27/60] c/r: introduce PF_RESTARTING, and skip notification on exit Oren Laadan
     [not found] ` <1248256822-23416-1-git-send-email-orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
2009-07-22  9:59   ` [RFC v17][PATCH 15/60] pids 5/7: Add target_pids parameter to copy_process() Oren Laadan
2009-07-22  9:59   ` [RFC v17][PATCH 28/60] c/r: support for zombie processes Oren Laadan
2009-07-22 10:00   ` [RFC v17][PATCH 41/60] c/r: dump anonymous- and file-mapped- shared memory Oren Laadan
2009-07-22 10:00   ` [RFC v17][PATCH 44/60] c/r: support for open pipes Oren Laadan
2009-07-22 10:00   ` [RFC v17][PATCH 54/60] c/r: add CKPT_COPY() macro Oren Laadan
2009-07-24 19:09   ` [RFC v17][PATCH 00/60] Kernel based checkpoint/restart Serge E. Hallyn
2009-07-22  9:59 ` [RFC v17][PATCH 29/60] c/r: Save and restore the [compat_]robust_list member of the task struct Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 30/60] c/r: infrastructure for shared objects Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 31/60] c/r: detect resource leaks for whole-container checkpoint Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 32/60] c/r: introduce '->checkpoint()' method in 'struct file_operations' Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 33/60] c/r: dump open file descriptors Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 34/60] c/r: restore " Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 35/60] c/r: add generic '->checkpoint' f_op to ext fses Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 36/60] c/r: add generic '->checkpoint()' f_op to simple devices Oren Laadan
2009-07-22  9:59 ` [RFC v17][PATCH 37/60] c/r: introduce method '->checkpoint()' in struct vm_operations_struct Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 38/60] c/r: dump memory address space (private memory) Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 39/60] c/r: restore " Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 40/60] c/r: export shmem_getpage() to support shared memory Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 42/60] c/r: restore anonymous- and file-mapped- " Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 43/60] splice: export pipe/file-to-pipe/file functionality Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 45/60] c/r: make ckpt_may_checkpoint_task() check each namespace individually Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 46/60] c/r: support for UTS namespace Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 47/60] deferqueue: generic queue to defer work Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 48/60] c/r (ipc): allow allocation of a desired ipc identifier Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 49/60] c/r: save and restore sysvipc namespace basics Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 50/60] c/r: support share-memory sysv-ipc Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 51/60] c/r: support message-queues sysv-ipc Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 52/60] c/r: support semaphore sysv-ipc Oren Laadan
     [not found]   ` <1248256822-23416-53-git-send-email-orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
2009-07-22 17:25     ` Cyrill Gorcunov
2009-07-23  3:46       ` Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 53/60] c/r: (s390): expose a constant for the number of words (CRs) Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 55/60] c/r: define s390-specific checkpoint-restart code Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 56/60] c/r: clone_with_pids: define the s390 syscall Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 57/60] c/r: capabilities: define checkpoint and restore fns Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 58/60] c/r: checkpoint and restore task credentials Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 59/60] c/r: restore file->f_cred Oren Laadan
2009-07-22 10:00 ` [RFC v17][PATCH 60/60] c/r: checkpoint and restore (shared) task's sighand_struct Oren Laadan

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