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References: <515bcf9c-352e-4f2b-b0d9-86c26171fa8f@cosarara.me>
From: Jacob Moody <moody@posixcafe.org>
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Subject: Re: [9front] qemu kernel for arm64, detected memory
Reply-To: 9front@9front.org
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On 1/7/24 06:07, cosarara wrote:
> Running 9front on qemu-system-aarch64 (trying to follow the directions in commit dd79854239a8c):
> 
> qemu-system-aarch64 -M virt-2.12,gic-version=3 \
>                      -cpu cortex-a57 -m 4G -smp 4 \
>                      -bios u-boot/u-boot.bin \
>                      -drive file=9front-10277.arm64.qcow2,if=none,id=disk \
>                      -device virtio-blk-pci-non-transitional,drive=disk \
>                      -nographic
> 
> u-boot correctly reports:
> 
>>   DRAM:  4 GiB
> 
> But then plan9:
> 
>>   ## Transferring control to Plan 9 (at address 40100000) ...
>>   127 holes free
>>   0x404c4000 0x429bd000 38768640
>>   38768640 bytes free
>>
>>   Plan 9
>>   timer frequency 62500000 Hz
>>   cpu0: 1000MHz QEMU
>>   127M memory: 41M kernel data, 86M user, 455M swap
>>   [...]
>>   cirno# cat /dev/swap
>>   129220608 memory
>>   4096 pagesize
>>   9465 kernel
>>   2993/22083 user
>>   0/94644 swap
>>   1556/22083 reclaim
>>   1816176/1966560/36545820 kernel malloc
>>   0/0/36545820 kernel draw
>>   768/65568/16777216 kernel secret
> 
> So it seems it does not detect the full amount. I don't know if this is a know bug in the kernel.
> 
> 
> 

This is a known issue. You can set *maxmem in plan9.ini to get it to use more memory.

Thanks,
moody