On 01.06.20 05:04, Benjamin Herrenschmidt wrote:
On Thu, 2020-05-28 at 15:12 +0200, Greg KH wrote:
So at runtime, after all is booted and up and going, you just ripped
cores out from under someone's feet? :)
And the code really handles writing to that value while the module is
already loaded and up and running? At a quick glance, it didn't seem
like it would handle that very well as it only is checked at ne_init()
time.
Or am I missing something?
Anyway, yes, if you can dynamically do this at runtime, that's great,
but it feels ackward to me to rely on one configuration thing as a
module parameter, and everything else through the ioctl interface.
Unification would seem to be a good thing, right?
I personally still prefer a sysfs file :) I really don't like module
parameters as a way to do such things.
I think we're going in circles :).
A module parameter initialized with module_param_cb gives us a sysfs
file that can also have a default parameter set through easily available
tooling.
The ioctl has two downsides:
1) It relies on an external application
2) The permission check would be strictly limited to CAP_ADMIN, sysfs
files can have different permissions
So I fail to see how a module parameter is *not* giving both of you and
me what we want? Of course only if it implements the callback. It was
missing that and apologize for that oversight.
Alex
Amazon Development Center Germany GmbH
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