> On Dec 1, 2014, at 7:43 AM, Hans Petter Selasky <h...@selasky.org> wrote: > >> On 12/01/14 16:39, Alfred Perlstein wrote: >> >> >>>> On Dec 1, 2014, at 7:34 AM, Hans Petter Selasky <h...@selasky.org> wrote: >>>> >>>> On 12/01/14 16:29, Alfred Perlstein wrote: >>>> >>>> >>>>>> On Dec 1, 2014, at 7:26 AM, Hans Petter Selasky <h...@selasky.org> wrote: >>>>>> >>>>>> On 12/01/14 16:19, Alfred Perlstein wrote: >>>>>> It makes little sense to have a rw sysctl that only takes effect "some >>>>>> times". This violates POLA at the expense of making code appear cleaner. >>>>>> Expectation is that writable sysctls take >>>>> >>>>> Hi, >>>>> >>>>> I think you are missing a new feature in 11-current, that if you add >>>>> "CTLFLAG_TUN" to even dynamic sysctls, they get initialized from the >>>>> enviroment, if any. That way you can just skip the TUNABLE_INT_FETCH() >>>>> stuff! >>>> >>>> Ok I can probably switch to that. >>>> >>>> Any objection if I mfc this feature to -stable if it does what I need? >>> >>> Hi, >>> >>> No objections from me at least, but it might require some work from your >>> side, because there was a lot of cleanup about removing duplicate >>> definitions, like static SYSCTLS which have already CTLFLAG_TUN and a >>> TUNABLE fetch statement, which makes the variable init twice. Just look at >>> the revision history for "kern/kern_sysctl.c" in 11-current. >>> >>> --HPS >> >> One question though... For the global sysctl for all nodes.... >> >> When is the var fetched? If it's before SI_SUB_CPU it is not useful. > > Hi, > > It is quite early, actually: > > SYSINIT(sysctl, SI_SUB_KMEM, SI_ORDER_FIRST, sysctl_register_all, 0); > > In some parts of the machine independent, MI, code you neee to keep the > TUNABLE_FETCH'es, because its run before SI_SUB_KMEM !
Then it will not work unless I move the global n_queues sysctl creation into the driver's mod load function. Is that ok? > > --HPS > > > _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
