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From: Rik van Riel (riel_at_surriel.com)
Date: Sun 31 Aug 2003 - 18:27:33 BST


On Sun, 31 Aug 2003, Herbert Poetzl wrote:

> what shall I say ... depends on the patch 8-)
>
> --- linux-2.4.22/arch/i386/kernel/entry.S 2003-06-13 16:51:29.000000000 +0200
> +++ linux-2.4.22-ctx17a/arch/i386/kernel/entry.S 2003-08-25 03:16:10.000000000 +0200
> @@ -663,6 +663,8 @@
> .long SYMBOL_NAME(sys_ni_syscall) /* sys_epoll_wait */
> .long SYMBOL_NAME(sys_ni_syscall) /* sys_remap_file_pages */
> .long SYMBOL_NAME(sys_ni_syscall) /* sys_set_tid_address */
> + .long SYMBOL_NAME(sys_new_s_context)
> + .long SYMBOL_NAME(sys_set_ipv4root) /* 260 */

259 is sys_timer_create()
260 is sys_timer_settime()

The syscall numbers up to 270 are already reserved,
maybe some beyond 270 too.

> > Does vserver have reserved syscall numbers already ?
>
> no ...
>
> > If so, are there any plans to get them ?
>
> we tried some time ago, but it wasn't possible ...

Why wasn't it ?

Given the fact that we already have sys_tux, sys_reiserfs4,
sys_afs, sys_sysfs and half a dozen more specialty syscalls,
surely it should be possible to reserve an official syscall
for vserver.

> > How about a sys_vserver multiplexer so we can easily add
> > things like setting a new ipv6 root to the interface,
> > without needing yet another syscall ?
>
> good idea ... go ahead implement some stuff ...

I will. The project I am currently working on is slowly
getting less busy, so I should have time soon. Hopefully
next week.

Rik

-- 
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it." - Brian W. Kernighan


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