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Date:      Wed, 11 Dec 2019 13:01:06 -0600
From:      CyberLeo Kitsana <cyberleo@cyberleo.net>
To:        freebsd-questions@freebsd.org
Subject:   Re: Cross-compiling with go for arm on amd64. Possible?
Message-ID:  <ef2fafd2-4d44-1884-b7a2-8ff1bd622e17@cyberleo.net>
In-Reply-To: <20191210152323.GA47078@thismonkey.com>
References:  <mailman.73.1575979201.5391.freebsd-questions@freebsd.org> <20191210152323.GA47078@thismonkey.com>

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On 12/10/19 9:23 AM, Scott Aitken wrote:
<snip>> rather than the dd I did:
> # truncate -s 512M /var/swapfile
> # ls -als /var/swapfile
> 96 -rw-r--r--  1 root  wheel  536870912 Dec 11 02:08 /var/swapfile
> 
> The fstab info was very helpful, thanks.  I've now got a 512M swapfile.

Don't use truncate(1) to create swapfiles. On filesystems that support 
sparse files, it will not allocate any space on the underlying 
filesystem. This can lead to a deadlock if the kernel attempts to swap 
and the filesystem runs out of space to allocate. It can also lead to 
extreme fragmentation, but that's not much of an issue on flash storage.

-- 
Fuzzy love,
-CyberLeo

<CyberLeo@CyberLeo.Net>
Technical Administrator

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