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Bug #2957

open

swapoff -a followed by swapon -a doesn't give your swap back

Added by neilb about 8 years ago. Updated about 8 years ago.

Status:
Feedback
Priority:
Normal
Assignee:
-
Category:
Kernel
Target version:
6.4
Start date:
10/09/2016
Due date:
% Done:

0%

Estimated time:

Description

I did swapoff -a taking all my swap away. I think I got an error message about an interrupted syscall from the program at the end of it. If you're trying to reproduce you should probably have swap space in use.

I then did swapon -a. It doesn't complain, and I can't remember if swap is shown as existing, but if it is the swap is not used.

A few hours later the kernel killed a process and in the sys logs there was a warning saying no swap space. None was used, it's that there wasn't any available at all, used or unused.

This has been a bug for a while; I remember it for 1-2 years at least.

$ uname -a
DragonFly zotac.akihabara.co.uk 4.5-DEVELOPMENT DragonFly v4.5.0.681.g2e03c8-DEVELOPMENT #2: Sun Mar 20 21:54:05 JST 2016 :/usr/obj/usr/src/sys/X86_64_GENERIC x86_64

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