[RFC] Huge sysctl patch for the kernel coming - work in progress

[Hans Petter Selasky]

On 06/18/14 23:13, John Baldwin wrote:
> On Wednesday, June 18, 2014 4:36:24 pm Hans Petter Selasky wrote:
>> On 06/18/14 15:44, John Baldwin wrote:
>>> On Wednesday, June 18, 2014 7:36:53 am Hans Petter Selasky wrote:
>>>> Hi,

>>
>> I'll probably put it into the tree next week.
>
> I think having CTLFLAG_TUN do this by default is probably correct in the
> long term.  The vast majority of places that use a tunable to prime a sysctl
> are safe.  Why not do this for the initial patch:
>
> - Add your change to auto-fetch values when CTLFLAG_TUN is set.
> - Instead of adding a CTLFLAG_FETCH, add a CTLFLAG_NOFETCH to disable
>    getenv().
> - Make a pass over the existing places that use CTLFLAG_TUN seeing which
>    ones are safe (so TUNABLE_* can just be removed), and which ones aren't
>    (in which case add CTLFLAG_NOFETCH).
>
> Followup changes can work on converting other places that don't currently
> use CTLFLAG_TUN but have a SYSCTL + TUNABLE to use CTLFLAG_TUN instead as
> well as fixing places that use CTLFLAG_NOFETCH to not need them.
>
> I would suggest you commit some of the style changes (like using explicit
> initializers in SYSCTL_OID()) as a separate change beforehand.
>

Hi,

See:
http://svnweb.freebsd.org/changeset/base/267633

And updated patch:
http://home.selasky.org:8192/sysctl_tunable.diff

--HPS