From: "Charles H. Sauer" <sauer@technologists.com>
To: tuhs@minnie.tuhs.org
Subject: Re: [TUHS] System V Release 2, adding swap?
Date: Tue, 26 Jan 2021 10:46:56 -0600 [thread overview]
Message-ID: <8a17ae54-1b00-e9f7-ea44-763c29c4023f@technologists.com> (raw)
In-Reply-To: <CAEdTPBfZRVVQzmT28MoLsGpz1z-kNea5n3zpupvzn5Ts=Dg6Qw@mail.gmail.com>
On 1/26/2021 10:05 AM, Henry Bent wrote:
> On Mon, 25 Jan 2021 at 11:02, Arnold Robbins <arnold@skeeve.com
> <mailto:arnold@skeeve.com>> wrote:
>
> Hi.
>
> Does anyone know how to add swap space on a System V Release 2 system?
> In particular, on an emulated AT&T 3B1. The kernel is S5R1 or S5R2
> vintage.
>
> I don't see any commands with 'swap' in their names.
>
> A little bit of Google Groups trawling turned up this:
> https://groups.google.com/g/comp.sys.att/c/8XLILI3K8-Y/m/VxVMJNdt9NQJ
> <https://groups.google.com/g/comp.sys.att/c/8XLILI3K8-Y/m/VxVMJNdt9NQJ>
>
> But I don't have one of those systems, so I have no way to verify.
>
> -Henry
I don't know about 3B versions, but on Dell SVR4 on 86Box
(https://notes.technologists.com/notes/2021/01/19/koko-dell-unix-sustainable/)
I see
/ # apropos swap
swap(1m): swap - swap administrative interface
swapctl(2): swapctl - manage swap space
...
I've never tried to adjust swap, just trust that our install did the
right thing. On this system, freshly booted, with 32M memory and 5G
"disk", I see
/ # swap -l
path dev swaplo blocks free
/dev/swap 0,2 0 98784 90960
Here's the beginning of man swap:
NAME
swap - swap administrative interface
SYNOPSIS
/usr/sbin/swap -a swapname swaplow swaplen
/usr/sbin/swap -d swapname swaplow
/usr/sbin/swap -l [ -s ]
/usr/sbin/swap -s
DESCRIPTION
swap provides a method of adding, deleting, and monitoring the system
swap areas used by the memory manager. The following options are
recognized:
-a Add the specified swap area. swapname is the name of the block
special partition, e.g., /dev/dsk/0s2 or a regular file. swaplow
is the offset in 512-byte blocks into the partition where the
swap area should begin. swaplen is the length of the swap area
in 512-byte blocks. This option can only be used by the super-
user. If additional swap areas are added, it is normally done
during the system start up routine /etc/rc2.d when going into
multi-user mode.
...
Charlie
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next prev parent reply other threads:[~2021-01-26 17:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-25 15:46 Arnold Robbins
2021-01-26 16:05 ` Henry Bent
2021-01-26 16:46 ` Charles H. Sauer [this message]
2021-01-26 18:43 ` arnold
2021-01-26 18:33 ` arnold
2021-01-27 0:50 Jason Stevens
2021-01-27 0:40 ` Larry McVoy
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