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[Bug 1360428] Comment bridged from LTC Bugzilla


------- Comment From ddstreet@xxxxxxxxxx 2014-08-22 20:43 EDT-------
(In reply to comment #10)
> This bug is missing log files that will aid in diagnosing the problem. From
> a terminal window please run:
> apport-collect 1360428
> and then change the status of the bug to 'Confirmed'.
> If, due to the nature of the issue you have encountered, you are unable to
> run this command, please add a comment stating that fact and change the bug
> status to 'Confirmed'.

This is a feature request, to add functionality to the kernel, not to
address any bug.  The request is to add patches for the 'zpool' api to
allow zswap to use either the zbud or zsmalloc storage backends.
Without the zpool patches, zswap can only use zbud, which provides only
2:1 storage compression, while with the zpool patches, zswap can use
zsmalloc, which provides much higher storage compression, closer to the
actual average page compression ratio.

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  Feature: Add zpool patchset to ubuntu 14.10

Status in “linux” package in Ubuntu:
  Fix Committed
Status in “linux” source package in Utopic:
  Fix Committed

Bug description:
  The zpool patch set allows zswap to use either zbud or zsmalloc for
  its compressed storage.  The patches are upstream now and will be in

  All 4 patches backported to ubuntu 14.10 kernel - only patch 2
  required a minor context change.  Taken from upstream patches (listed
  in reverse order of attached patches):

  12d79d6 mm/zpool: update zswap to use zpool
  c795779 mm/zpool: zbud/zsmalloc implement zpool
  af8d417 mm/zpool: implement common zpool api to zbud/zsmalloc
  99eef8e mm/zbud: change zbud_alloc size type to size_t

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