On Dec 19, 2022, at 15:10, Samuel Sieb <sam...@sieb.net> wrote:
>
> On 12/19/22 11:58, Neal Becker wrote:
>> I've just installed f37 on a new lenovo x1 carbon.
>> One thing, the installation didn't setup any swap (other than zswap).
>> 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?
>
> Something is wrong with how it creates the swap format. Just run "mkswap
> /swapfile" and it will be
I totally missed the size discrepancy.
I believe in new btrfs versions, you can use:
# btrfs filesystem mkswapfile swapfile
# swapon swapfile
https://btrfs.readthedocs.io/en/latest/Swapfile.html
Otherwise you need to set the No_COW attribute with `chattr +C
/path/to/swap/directory`.
--
Jonathan Billings
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