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SubjectRe: Maximum mountpoints + chrooted login
Date
From: "Alexander Viro" <viro@math.psu.edu>
>
[snip]
>
> I didn't go for proper solution in 2.4.0-test*). However, instead of
> crufting up kinda-sorta namespaces one could use the real thing. Relevant
> cleanups of superblock handling will go in in 2.5.very_early and the
> rest of patch (namespace proper) takes about 10Kb.
>

I'll wait for 2.5 then...
Where's that namespace patch located?

> You can simply say clone(CLONE_NAMESPACE,NULL) and you get an independent
> set of mounts to play with. mount/umount whatever you want before dropping
> the root priveleges. All children of that process will share its
namespace.
> When the last one goes away everything will be garbage-collected - no
> need to umount anything on logout.
>

Lovely!

>
> With the mntcache in - not really. It fixes the main performance problem.

Now in 2.4.5 it's darn slow to _unmount_, it's like 100 times faster to
mount than unmount :)

Cheers

Magnus Naeslund

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Programmer/Networker [|] Magnus Naeslund
PGP Key: http://www.genline.nu/mag_pgp.txt
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