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Date: Tue, 7 Apr 2015 01:31:08 +0300
From: Gleb Smirnoff <glebius@FreeBSD.org>
To: Lawrence Stewart <lstewart@freebsd.org>
Subject: Re: svn commit: r281151 - projects/ifnet/sys/net
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On Mon, Apr 06, 2015 at 01:52:36PM -0700, Lawrence Stewart wrote:
L> > Author: glebius
L> > Date: Mon Apr  6 15:22:32 2015
L> > New Revision: 281151
L> > URL: https://svnweb.freebsd.org/changeset/base/281151
L> > 
L> > Log:
L> >   Provide software context store in struct ifnet for any facility. To add
L> >   a new facility, one needs to grab a value in the ift_feature enum, and
L> >   not need to modify struct ifnet.
L> >   
L> >   The store also has a cache to return frequently requested values,
L> >   which resembles kobj(9) method cache.
L> >   
L> >   The plan is to move into the softc store almost all possible software
L> >   contexts that hang off the struct ifnet, leaving static only the driver
L> >   softc, AF_INET, AF_INET6 pointers, and other frequently used pointer.
L> 
L> It seems likely that this is partially reinventing OSD(9) (also see the
L> way I used it for for khelp(9)). Perhaps OSD could be improved with some
L> useful things like the cache and then it might be a suitable drop in
L> replacement here as well?

Yes, osd(9) looks very like. For now I'd prefer to keep the simple stuff
from r281151, to avoid introducing extra locks. Later we can estimate
osd(9).

-- 
Totus tuus, Glebius.