Re: [TECH TOPIC] Reaching consensus on CONFIG_HIGHMEM phaseout

Richard Weinberger
2025-10-06T20:22:34Z

----- Ursprüngliche Mail -----
> Von: "Arnd Bergmann" <arnd@arndb.de>
>>> Has anybody run into actual end user visible problems when using one of
>>> weirdo PAGE_OFFSET configs?
>>
>> In the past I saw that programs such as the Java Runtime (JRE) ran into
>> address space limitations due to a 2G/2G split on embedded systems.
>> Reverting to a 3G/1G split fixed the problems.
>
> Right, that makes sense, given the tricks they likely play on the
> virtual address space. Are the 2GB devices you maintain using a JRE,
> or was this on other embedded hardware? How common is Java still in
> this type of workload?

Sorry for the late reply, I was on vacation.

No, the devices with the JRE issues are from a different customer.
Since I work as a consultant lots of strange issues get thrown my way

I wouldn't say Java is super common but I still see it from time to time.

Thanks,
//richard