[LEDE-DEV] [PATCH] base-files: seed /dev/urandom

[Felix Fietkau]

On 2016-06-14 10:13, Etienne Champetier wrote:
>>> Before we try to minimize writes, how much writes are we talking about?
>>> my openwrt routers have multiple months of uptime, and even if we get
>>> down to 1 week, that gets us to 53 writes a year.
>>> How much writes can a flash handle these days?
>> I'm more concerned about the worst case than the average case here.
>> There are people that do a forced reboot every day (as a stability
>> workaround), or only power up their devices during specific times of the
>> day (multiple reboots per day). This can easily add up to bigger numbers.
>>
>> Also, adding something like this makes other people want to add even
>> more stuff that writes to flash on every boot, as you've so clearly
>> demonstrated by pointing out that this behavior are already done for
>> dnssec/dnsmasq.
> 
> Ok, let's find a middle ground :)
> What about saving a seed if there is none (on boot), and then using an
> ntp hotplug (stratum event) and save a new seed if older than say 1
> week?
I think that's reasonable.

- Felix