Re: [PATCH 7/7] uts namespaces: Implement CLONE_NEWUTS flag

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Quoting Andi Kleen ([email protected]):
> 
> > But, either the nsproxy is shared between tasks and you need to copy
> > youself a new one as soon as any ns changes
> 
> That would be the case. But it is only shared between tasks where 
> all the name spaces are the same.

Ok, that is how I was thinking.

> > , or it is not shared, and 
> > you don't need  that info at all (just make the change in the nsproxy
> > immediately)
> 
> Don't follow you here.
> 
> Basically the goal is to have a minimum number of nsproxies in the system without
> having to maintain a global hash table. So instead you assume that name space
> changes are infrequent. In the common case of clone without a name space change
> you just share the nsproxy of the parent. If there is a name space change of
> any kind you get a new one.
> 
> This won't get the absolute minimum number of nsproxies, but should be reasonably
> good without too much effort.

Ok.  Then I maintain that the bitmap of changed namespaces seems
unnecessary.  Since you're likely sharing an nsproxy with your parent
process, when you clone a new namespace you just want to immediately get
a new nsproxy pointing to the new namespaces.

Anyway this seems simple enough to just code up.  Simpler than
continuing to talk about it  :)

-serge
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux