On Fri, Nov 13, 2020 at 5:41 AM Sreyan Chakravarty <sreyan32(a)gmail.com> wrote:
1) Why doesn't fallocate work anymore ?
Fallocate is the preferred way to do this, e.g.
fallocate -l 8G swapfile
2) I tried dd if=/dev/zero of=/fedora.swap bs=1 count=0
seek=8G
This did not work. swapon complained about files being full of holes.
That's because that command creates a sparse file, which has holes in
it. Same as using 'truncate'.
What is so special about bs=1M ?
I think it's count=0 and seek= that causes it to become sparse. I
don't think the bs size is relevant.
/fedora.swap none swap sw 0 0
I have no idea what 'sw' is in the fstab file is for; I don't see it
in either man fstab or man swapon. I'd just make this line:
/fedora.swap none defaults
I now have a new problem.
SELinux is preventing systemd-logind to read the swap file.
Here is the message:
SELinux is preventing systemd-logind from read access on the file /fedora.swap.
mkswap sets the label. So this is a secondary effect of what Sam Sieb
already discovered from the lack of a blkid swap signature. You forgot
to use mkswap on the file.
--
Chris Murphy