Technically that would be a trim operation. Fragmentation is not a thing on an ssd as it can read from multiple blocks. And forcing it to run will only burn up your write cycles.
Defragmentation should be an issue for you on an SSD, even if there is some, right?
------------------------------
Message: 4
Date: Wed, 28 Oct 2020 17:08:03 -0700
From: Matt Graham <mhgraham@crow202.org>
To: <plug-discuss@lists.phxlinux.org>
Subject: Re: swap file vs swap partition
Message-ID: <064f92165a42d6f88a3430b42a5211f6@crow202.org>
Content-Type: text/plain; charset=UTF-8; format=flowed
On 2020-10-28 16:24, Steve Litt via PLUG-discuss wrote:
> On Wed, 28 Oct 2020 13:43:22 -0700
> Bob Elzer via PLUG-discuss <plug-discuss@lists.phxlinux.org> wrote:
>> The biggest difference is, files can become fragmented while
>> partitions don't.
> I had no idea there was such a thing as a Linux swap file. I guess
> that's a recent thing.
You could use a file as swap space in the early 2000s. I remember
doing that on a few machines then.
> If my partition file becomes fragmented, is there a way for me
> to defragment it?
Probably not. However, file fragmentation is not generally a problem
on modern machines because disks and CPUs are much faster than they were
in 1998. If you use ext4 and have a disk that's less than 10 years old
and less than 95% full, you will not notice anything. /swapfile on my
laptop has 11 extents and it doesn't seem to have any problems.
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