Re: [PATCH] IPC initialize shmmax and shmall from the current value not the default

[Manfred Spraul]

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Hi Marian,

On 05/22/2014 03:01 PM, Marian Marinov wrote:
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> On 05/05/2014 10:59 PM, Marian Marinov wrote:
> > In my tests it worked exactly as expected. Here is an example:
> >
> > [root@sp2 ~]# sysctl -a|grep shmmax kernel.shmmax = 68719476736 [root@sp2 ~]# lxc-attach -n cent_plain
> > [root@localhost ~]# sysctl -a|grep shmmax kernel.shmmax = 68719476736 [root@localhost ~]# halt [root@sp2 ~]# sysctl
> > -a|grep shmmax kernel.shmmax = 68719476736 [root@sp2 ~]# sysctl kernel.shmmax=34359738368 kernel.shmmax =
> > 34359738368 [root@sp2 ~]# lxc-start -n cent_plain -d [root@sp2 ~]# lxc-attach -n cent_plain [root@localhost ~]#
> > sysctl -a|grep shmmax kernel.shmmax = 34359738368 [root@localhost ~]#
> >
> > So it seams to work as expected :)
> >
> > It works because wen you setup a new shmmax limit it is actually the limit in the init_ipc_ns. So when we are
> > creating a new ipc_ns its ok to copy the values from init_ipc_ns.
> >
> > -Marian
> Ping?
>
> So will there be any more comments on that?
Attached is an untested idea:
- each new namespace copies from it's parent, i.e. nested namespaces 
should work.
- msg, sem and shm updated

--
    Manfred