Re: kernel: warning: total configured swap (493567 pages) exceeds maximum recommended amount

On Tue, Nov 11, 2025 at 10:53:55AM -0800, bob prohaska wrote:
>On Tue, Nov 11, 2025 at 05:09:46PM +0000, void wrote:
>>
>> I've been testing with
>>
>> % fio --name=random_rw_test --filename=./testfile1 --rw=randrw --bs=128k \
>> --ioengine=posixaio --iodepth=256 --numjobs=4 --runtime=120 --time_based \
>> --group_reporting --direct=1 --size=1G
>>
>> I'd be interested to know what the last few lines after "Run status group 0
>> (all jobs):" is for your usb2 spinning context
>> as I have no usb2 interfaced hard drive i can test with
>> --
>>
>
>My Pi2's are busy for now, but an idle Pi4 (so, USB3) reported
>
>bob@nemesis:~ % fio --name=random_rw_test --filename=./testfile1 --rw=randrw --bs=128k \
>? --ioengine=posixaio --iodepth=256 --numjobs=4 --runtime=120 --time_based \
>? --group_reporting --direct=1 --size=1G
>random_rw_test: (g=0): rw=randrw, bs=(R) 128KiB-128KiB, (W) 128KiB-128KiB, (T) 128KiB-128KiB, ioengine=posixaio, iodepth=256

> READ: bw=10.4MiB/s (10.9MB/s), 10.4MiB/s-10.4MiB/s (10.9MB/s-10.9MB/s), io=1320MiB (1384MB), run=126934-126934msec
> WRITE: bw=10.8MiB/s (11.3MB/s), 10.8MiB/s-10.8MiB/s (11.3MB/s-11.3MB/s), io=1374MiB (1440MB), run=126934-126934msec

usb2 *key* into a usb3 socket on amd64 gave the following figures for 128k blocksize
ufs2:

fio --name=random_rw_test --filename=./testfile2 --rw=randrw --bs=128k \
--ioengine=posixaio --iodepth=256 --numjobs=4 --runtime=120 --time_based \
--group_reporting --direct=1 --size=1G

Run status group 0 (all jobs):
READ: bw=1578KiB/s (1616kB/s), 1578KiB/s-1578KiB/s (1616kB/s-1616kB/s), io=290MiB (304MB), run=188019-188019msec
WRITE: bw=1653KiB/s (1693kB/s), 1653KiB/s-1653KiB/s (1693kB/s-1693kB/s), io=304MiB (318MB), run=188019-188019msec

for 4k blocksize into the same amd64 machine

# fio --name=random_rw_test --filename=./testfile2 --rw=randrw --bs=4k \
--ioengine=posixaio --iodepth=256 --numjobs=4 --runtime=120 --time_based \
--group_reporting --direct=1 --size=1G

READ: bw=12.7KiB/s (13.0kB/s), 12.7KiB/s-12.7KiB/s (13.0kB/s-13.0kB/s), io=3408KiB (3490kB), run=268593-268593msec
WRITE: bw=13.7KiB/s (14.0kB/s), 13.7KiB/s-13.7KiB/s (14.0kB/s-14.0kB/s), io=3672KiB (3760kB), run=268593-268593msec

The rpi2b+ is busy rn building fio then it needs to re-build+installkernel. I'll run local and nfs testing
afterwards then report back
--