Re: [RFC V1 1/1] net: cdc_ncm: Reduce memory use when kernel memory low

[David Miller]

From: Oliver Neukum <oneukum@xxxxxxxx>
Date: Tue, 23 May 2017 10:42:48 +0200

> Am Montag, den 22.05.2017, 11:54 -0400 schrieb David Miller:
>> 
>> Unfortunately without a real notifier of some sort (there isn't one, and
>> it isn't actually easy to come up with a clean way to do this which is
>> probably why it doesn't exist yet in the first place) I really cannot
>> recommend anything better.
>> 
>> That being said, probably for the time being we should just backoff each
>> and every request, always trying initially to do the higher order thing.
> 
> We could use a counter. After the first failure, do it once, after the
> second twice and so on. And reset the counter as a higher order
> allocation works. (just bound it somewhere)

So an exponential backoff, that might work.