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________________________________
From: YunQiang Su <wzss...@gmail.com>
Sent: Friday, January 12, 2024 10:11
To: r...@neoquasar.org
Cc: noloa...@gmail.com; debian-kernel@lists.debian.org; 
debian-...@lists.debian.org; debian-de...@lists.debian.org; 
debian-rele...@lists.debian.org
Subject: Re: Ability to further support 32bit architectures

<r...@neoquasar.org> 于2024年1月12日周五 23:59写道: 
> 
> Keeping in mind that I am new to this arena... 
> 
> I have some Intel systems - both 64-bit and 32-bit - that I might be able to 
> use as build platforms. 
> 

I guess all of your hardwares are 64bit. You setup different OS on them.

No. I have multiple 32-bit systems, one of which is Intel. 

> What does the Debian team need from me to be able to use these systems? 
> 

It's not about performance of hardware. It is about some limitation of 32bit. 
2 examples for it: 
   1. if we use 32bit value for time, it will overflow in 2038, then 
your time will be shown as 1900. 
       https://en.wikipedia.org/wiki/Year_2038_problem 
   2. A single process (or maybe APP, not precisely), can only use UP 
to 4GiB RAM. 
       In fact on most system the value is less than 4GiB: 
          on intel32, it is 3GiB 
          on mips32, it is 2GiB 
       But currently, it is not enough, for example, when we build a 
big APP, it will need much more RAM. 
       The RAM does install in your Rack, but you can NOT use it. 
      https://en.wikipedia.org/wiki/3_GB_barrier 

> I can't guarantee they'll be FAST, but I'll do what I can to make them 
> EFFECTIVE. 
> 

If you are really need 32bit system. Maybe you can say out why you 
*REALLY* need it. 
For most users, the suggestion is: upgrade to 64bit. 


That's not at all what I was asking or talking about. 

--J

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