[lkml]   [2006]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Which of the virtualization approaches is more suitable for kernel?
Dave Hansen <> writes:

> On Mon, 2006-02-27 at 14:14 -0700, Eric W. Biederman wrote:
>> I like the namespace nomenclature. (It can be shorted to _space or _ns).
>> In part because it shortens well, and in part because it emphasizes that
>> we are *just* dealing with the names.
> When I was looking at this, I was pretending to be just somebody looking
> at sysv code, with no knowledge of containers or namespaces.
> For a person like that, I think names like _space or _ns are pretty much
> not an option, unless those terms become as integral to the kernel as
> things like kobjects.

To be clear I was talking name suffixes. So ipc_space certainly conveys
something, and even ipc_ns may be ok.

>> You split the resolution at just ipc_msgs. When I really think it should
>> be everything ipcs deals with.
> This was just the first patch. :)


Just wanted to make certain we agreed on the scope.

>> Performing the assignment inside the tasklist_lock is not something we
>> want to do in do_fork().
> Any particular reason why? There seem to be a number of things done in
> there that aren't _strictly_ needed under the tasklist_lock. Where
> would you do it?

Well all of the other things we can share or not share are already
outside of the tasklist_lock.

We may not be quite minimal but we actually are fairly close to minimal
inside the tasklist_lock.

>> So it looks like a good start. There are a lot of details yet to be filled
>> in, proc, sysctl, cleanup on namespace release. (We can still provide
>> the create destroy methods even if we don't hook the up).
> Yeah, I saved shm for last because it has the largest number of outside
> interactions. My current thoughts are that we'll need _contexts or
> _namespaces associated with /proc mounts as well.

Yes. I think the easy way to handle this is to have a symlink
from /proc/sysvipc to /proc/self/sysvipc. And then we have a per
process reporting area.

That preserves all of the old programs but enables us to get the
information out.

>> I think in this case I would put the actual namespace structure
>> definition in util.h, and just put a struct ipc_ns in sched.h.
> Ahhh, as in
> struct ipc_ns;
> And just keep a pointer from the task? Yeah, that does keep it quite
> isolated.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2006-02-27 23:02    [W:0.131 / U:0.412 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site