How to disable a Ram Swap permanently
NoOp
glgxg at sbcglobal.net
Mon Mar 15 16:21:19 UTC 2010
On 03/10/2010 04:36 AM, Johnneylee Rollins wrote:
> On Wed, Mar 10, 2010 at 4:17 AM, Tom H <tomh0665 at gmail.com> wrote:
>>>>> To increase the prioirity, change the last column of your /etc/fstab swap
>>>>> definitions. Currently one of them is set to 100 and the other set to -1
>>>>> (which would be the minimum priority. Swap them around if you want to
>>>>> preserve both. If you have only one swap partition/file, the priority
>>>>> doesn't mean anything and can be left at anything.
>>
>>>> Very very wrong. Do not change the numbers at the end of the swap
>>>> lines. See man fstab for more details.
>>
>>> It is you who is very wrong Rashkae:
>>> http://ubuntuforums.org/showpost.php?p=205262&postcount=3
>>> The swap filesystem isn't the same as other filesystems.
>>
>> Your link above confirms what Rahskae said: for swap, the dump and
>> pass values in fstab must both be 0.
>>
>
> I was referring to the priorities.
You did read 'man fstab', right?
<quote>
The sixth field, (fs_passno), is used by the fsck(8) program to
determine the order in which filesystem checks are done at reboot time.
The root filesystem should be specified with a fs_passno of 1, and
other filesystems should have a fs_passno of 2. Filesystems within a
drive will be checked sequentially, but filesystems on different drives
will be checked at the same time to utilize parallelism available in
zero is returned and fsck will assume that the filesystem does not need
to be checked.
</quote>
The fourth field would be where you define the priority for swap. Example:
<file system> <mount point> <type> <options> <dump> <pass>
/dev/hda1 swap swap pri=42 0 0
http://manpages.ubuntu.com/manpages/karmic/en/man8/swapon.8.html
<quote>
-p priority
Specify priority for swapon. This option is only available if
swapon was compiled under and is used under a 1.3.2 or later
kernel. priority is a value between 0 and 32767. Higher numbers
indicate higher priority. See swapon(2) for a full description
of swap priorities. Add pri=value to the option field of
/etc/fstab for use with swapon -a.
</quote>
http://manpages.ubuntu.com/manpages/karmic/en/man2/swapon.2.html
Hakan had suggested:
To increase the prioirity, change the last column of your /etc/fstab
swap definitions.
Rashkae pointed out that is wrong. To do so would be changing the
fs_passno value.
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