Dale Ghent wrote:
>
> On Jun 9, 2009, at 1:47 PM, Garrett D'Amore wrote:
>
>
> Disagree on the driver tunable aspect. As pointed out, other OSes make
> this a configurable aspect during run time. Relegating *SO options
> (and other such features) in Solaris to bound-to-be-inconsistent
> driver.conf variables, effectively requiring a reboot to have changes
> take effect, is sub-optimal.
>
> See jumbo frames as an example. Management of that is now consistent
> through dladm where in the past you had to do any combination of
> /etc/system or driver.conf voodoo. Jumbo is a feature. VLAN tagging is
> a feature. WhateverSO is also a feature. Features should be manageable
> through dladm and consistent property names across drivers, regardless
> of how useful one may think this could be.
Bzzt. You're conflating things here. VLAN and Jumbo frames affect *on
the wire* transmission and *need* to be tunable.
TSO and LSO are *optimizations* that don't affect on the wire
presentation, and needing to tune them at all is a *bug*.
*NOBODY* except someone doing debugging or working around a *bug* should
ever need to turn them off. If other OS' are making this tunable, its
precisely to workaround buggy behavior, not because tunability here is
desirable.
- Garrett
