15 Dec, 2011
1 commit
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After all sysdev classes are ported to regular driver core entities, the
sysdev implementation will be entirely removed from the kernel.Cc: Jeremy Fitzhardinge
Cc: Konrad Rzeszutek Wilk
Signed-off-by: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
29 Sep, 2011
1 commit
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Add an highmem parameter to alloc_xenballooned_pages, to allow callers to
request lowmem or highmem pages.Fix the code style of free_xenballooned_pages' prototype.
Signed-off-by: Stefano Stabellini
Signed-off-by: Konrad Rzeszutek Wilk
26 Jul, 2011
1 commit
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Memory hotplug support for Xen balloon driver. It should be mentioned
that hotplugged memory is not onlined automatically. It should be onlined
by user through standard sysfs interface.Memory could be hotplugged in following steps:
1) dom0: xl mem-max
where is >= requested memory size,2) dom0: xl mem-set
where is requested memory size; alternatively memory
could be added by writing proper value to
/sys/devices/system/xen_memory/xen_memory0/target or
/sys/devices/system/xen_memory/xen_memory0/target_kb on dumU,3) domU: for i in /sys/devices/system/memory/memory*/state; do \
[ "`cat "$i"`" = offline ] && echo online > "$i"; doneMemory could be onlined automatically on domU by adding following line to
udev rules:SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /sys$devpath/state'"
In that case step 3 should be omitted.
Signed-off-by: Daniel Kiper
Acked-by: Konrad Rzeszutek Wilk
Cc: Ian Campbell
Cc: Jeremy Fitzhardinge
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Jul, 2011
1 commit
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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
[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
Cc: Jeremy Fitzhardinge
Cc:
16 Mar, 2011
2 commits
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Pages that have been ballooned are useful for other Xen drivers doing
grant table actions, because these pages have valid struct page/PFNs but
have no valid MFN so are available for remapping.Acked-by: Ian Campbell
Signed-off-by: Daniel De Graaf
[v2: Deal with rebasing on top of modified balloon code]
Signed-off-by: Konrad Rzeszutek Wilk -
The basic functionality of ballooning pages is useful for Xen drivers in
general. Rather than require a dependency on the balloon module, split
the functionality that is reused into the core. The balloon module is
still required to follow ballooning requests from xenstore or to view
balloon statistics in sysfs.Acked-by: Ian Campbell
Signed-off-by: Daniel De Graaf
Signed-off-by: Konrad Rzeszutek Wilk
03 Oct, 2008
1 commit
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The balloon driver doesn't have any externally callable functions at
the moment, so remove the (effectively empty) header. We can add it
back if we need to.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar
25 Apr, 2008
1 commit
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The balloon driver allows memory to be dynamically added or removed from the domain,
in order to allow host memory to be balanced between multiple domains.This patch introduces the Xen balloon driver, though it currently only
allows a domain to be shrunk from its initial size (and re-grown back to
that size). A later patch will add the ability to grow a domain beyond
its initial size.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner