Re: [PATCH] xfrm: dst_entries_init() per-net dst_ops

[Hannes Frederic Sowa]

Hello,

On Wed, Oct 28, 2015, at 14:32, Dan Streetman wrote:
> On Tue, Oct 27, 2015 at 12:15 PM,  <dan.streetman@xxxxxxxxxxxxx> wrote:
> > From: Dan Streetman <dan.streetman@xxxxxxxxxxxxx>
> >
> > The ipv4 and ipv6 xfrms each create a template dst_ops object, and
> > perform dst_entries_init() on the template objects.  Then each net
> > namespace has its net.xfrm.xfrm[46]_dst_ops field set to the template
> > values.  The problem with that is the dst_ops.pcpuc_entries field is
> > a percpu counter and cannot be used correctly by simply copying it to
> > another object.

How hard would it be to split of the counters from the dst_ops struct?
We could make dst_ops instances const and have normal pointers to them
and keep the dst_entries as a small array in net namespace?

Bye,
Hannes
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