linux/include/xen
Dan Magenheimer a50777c791 xen: tmem: self-ballooning and frontswap-selfshrinking
This patch introduces two in-kernel drivers for Xen transcendent memory
("tmem") functionality that complement cleancache and frontswap.  Both
use control theory to dynamically adjust and optimize memory utilization.
Selfballooning controls the in-kernel Xen balloon driver, targeting a goal
value (vm_committed_as), thus pushing less frequently used clean
page cache pages (through the cleancache code) into Xen tmem where
Xen can balance needs across all VMs residing on the physical machine.
Frontswap-selfshrinking controls the number of pages in frontswap,
driving it towards zero (effectively doing a partial swapoff) when
in-kernel memory pressure subsides, freeing up RAM for other VMs.

More detail is provided in the header comment of xen-selfballooning.c.

Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>

[v8: konrad.wilk@oracle.com: set default enablement depending on frontswap]
[v7: konrad.wilk@oracle.com: fix capitalization and punctuation in comments]
[v6: fix frontswap-selfshrinking initialization]
[v6: konrad.wilk@oracle.com: fix init pr_infos; add comments about swap]
[v5: konrad.wilk@oracle.com: add NULL to attr list; move inits up to decls]
[v4: dkiper@net-space.pl: use strict_strtoul plus a few syntactic nits]
[v3: konrad.wilk@oracle.com: fix potential divides-by-zero]
[v3: konrad.wilk@oracle.com: add many more comments, fix nits]
[v2: rebased to linux-3.0-rc1]
[v2: Ian.Campbell@citrix.com: reorganize as new file (xen-selfballoon.c)]
[v2: dkiper@net-space.pl: proper access to vm_committed_as]
[v2: dkiper@net-space.pl: accounting fixes]
Cc: Jan Beulich <JBeulich@novell.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: <xen-devel@lists.xensource.com>
2011-07-08 12:26:21 -06:00
..
interface Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem 2011-05-26 10:50:56 -07:00
balloon.h xen: tmem: self-ballooning and frontswap-selfshrinking 2011-07-08 12:26:21 -06:00
events.h xen/irq: Export 'xen_pirq_from_irq' function. 2011-04-14 11:17:55 -04:00
evtchn.h xen: add /dev/xen/evtchn driver 2009-03-30 09:26:49 -07:00
features.h xen: Core Xen implementation 2007-07-18 08:47:42 -07:00
gntalloc.h xen/gntalloc,gntdev: Add unmap notify ioctl 2011-02-14 14:16:17 -05:00
gntdev.h xen/gntalloc,gntdev: Add unmap notify ioctl 2011-02-14 14:16:17 -05:00
grant_table.h xen: introduce gnttab_map_refs and gnttab_unmap_refs 2011-01-11 14:32:00 -05:00
hvc-console.h xen64: fix !HVC_XEN build dependency 2008-07-16 11:06:48 +02:00
hvm.h x86/xen: event channels delivery on HVM. 2010-07-22 16:45:59 -07:00
Kbuild xen: add privcmd driver 2010-10-20 16:22:29 -07:00
page.h xen: add extra pages to balloon 2010-11-19 22:15:59 -08:00
platform_pci.h xen: pvhvm: make it clearer that XEN_UNPLUG_* define bits in a bitfield 2010-08-23 12:01:35 +01:00
privcmd.h xen: fix header export to userspace 2010-11-16 10:57:05 -08:00
swiotlb-xen.h swiotlb-xen: SWIOTLB library for Xen PV guest with PCI passthrough. 2010-07-27 11:51:00 -04:00
tmem.h xen: tmem: self-ballooning and frontswap-selfshrinking 2011-07-08 12:26:21 -06:00
xen-ops.h xen: suspend: add "arch" to pre/post suspend hooks 2011-02-25 16:43:12 +00:00
xen.h xen: move Xen-testing predicates to common header 2009-11-04 08:47:24 -08:00
xenbus.h xen: xenbus PM events support 2011-03-16 13:06:29 -04:00
xencomm.h xen: import arch generic part of xencomm 2008-04-24 23:57:32 +02:00