Ubuntu
initramfs-tools package

Support for zram (Linux >2.6.36) and ramzswap(<2.6.35) is missing

Bug #665785 reported by Eugene San on 2010-10-24

This bug affects 14 people

Affects		Status	Importance	Assigned to	Milestone
	initramfs-tools (Ubuntu)	Triaged	Undecided	Unassigned

Bug Description

Binary package hint: initramfs-tools

Support for zram (Linux >2.6.36) and ramzswap(<2.6.35) is missing in late versions.

Patch with solution attached.

Tags:

Revision history for this message

Eugene San (eugenesan) wrote on 2010-10-24:

Additional compacache modes, zram (>=2.6.36) and ramzswap (<2.6.35) Edit (1.8 KiB, text/plain)

Changed in initramfs-tools (Ubuntu):
status:	New → Fix Committed

Brian Murray (brian-murray) on 2010-10-24

tags:

added: patch

Brian Murray (brian-murray) on 2011-04-01

Changed in initramfs-tools (Ubuntu):
status:	Fix Committed → New

Martin Hamrle (hamrle) on 2011-05-22

Changed in initramfs-tools (Ubuntu):
status:	New → Confirmed

Revision history for this message

Eugene San (eugenesan) wrote on 2011-06-12:

Compacache fixes for: zram (>=2.6.36), ramzswap (<2.6.35) and ramzswap (=2.6.35) Edit (5.2 KiB, text/plain)

Hi,

I've re-based my modifications to initramfs-tools-0.98.8ubuntu3
Now it supports:
* ramzswap for Linux 2.6.32
* ramzswap for Linux 2.6.35
* zram for Linux 2.6.38
Maybe also versions in the middle.

Colin:
Your attempt to avoid creation of dynamic initramfs script wasn't successful since udev do not support quotation inside RUN command.

Brian Murray (brian-murray) on 2011-06-16

Changed in initramfs-tools (Ubuntu):
status:	Confirmed → Triaged

Revision history for this message

Sergey "Shnatsel" Davidoff (shnatsel) wrote on 2011-09-24:

In today's daily build Ubiquity had /dev/zram0 as a default device to install the OS. WTF?!

Also, I've put together a zram-based swap that automatically scales across several CPUs and automatically adapts to the amount of RAM available. It's based on upstart instead of initramfs, and seems to work fine for me. I haven't tested package upgrade though, so it might be buggy. You can find the code at lp:~elementaryos/elementaryos/zramswap-enabler