Re: [PATCH 0/5][V2] FS: userspace notification of errors

From: Kay Sievers
Date: Thu Jun 11 2009 - 12:44:21 EST

On Thu, Jun 11, 2009 at 18:41, Jamie Lokier<jamie@xxxxxxxxxxxxx> wrote:
> Kay Sievers wrote:
>> No, the objection was to use the underlying *device* as the source to
>> raise filesystem events. I don't think there are problems in general
>> with objects in /sys/fs/ sending events.
>> But, the remaining questions here are:
>> Do we really want superblocks exported in the global,
>> non-namespace-aware /sys? It might be wrong to export stuff from other
>> namespaces for filesytems which are irrelevant, and not even visible.
>> I'm not sure about this, and it needs careful evaluation. We once had
>> filesystem mount/umount uevents on block devices, and we needed to
>> remove them for that namespace reason.
> Is there no namespace awareness in /sys?

No, not at all. It is the straight export of the core kernel objects.

> So how do namespaced guests deal with not having access to /sys, given
> modern distros make extensive use of it?

They ignore it and don't use it, or get confused, I guess. :)

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