Re: Adding file swap on btrfs

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> On 19 Dec 2022, at 19:59, Neal Becker <ndbecker2@xxxxxxxxx> wrote:
> 
> 
> I've just installed f37 on a new lenovo x1 carbon.
> One thing, the installation didn't setup any swap (other than zswap).
> 

That is the preferred way to setup swap. Research has shown that
use of swap files on HDD or SSD is far worse then using the zswap in almost
all desktop workloads.

My advice is to not bother adding a swap file, you are very unlikely to ever need it.

Barry



> After a bit of reading I found
> sudo btrfs filesystem mkswapfile -s 32G /swapfile
> But:
>  sudo swapon -v /swapfile 
> swapon: /swapfile: found signature [pagesize=4096, signature=swap] 
> swapon: /swapfile: pagesize=4096, swapsize=1073741824, devsize=34359738368
> 
> Although I created 32G swapfile, only 1G is used.
> swapon 
> NAME       TYPE       SIZE USED PRIO 
> /dev/zram0 partition    8G 6.3M  100 
> /swapfile  file      1024M   0B   -2
> 
> 
> What's wrong?
> 
> Thanks,
> Neal
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