Instead of sending dirty pages of guest memory as-is, use a simple compression
algorithm that sends a RLE-encoded XOR of the page against its last sent copy.
A small LRU cache is used to hold recently dirtied pages. Pagetable pages are
sent as-is, as they are canonicalized at sender side and uncanonicalized at
receiver.
[ Fixed up a conflict in sg_save_restore.h. I had to increase the
ID values used from -11 and -12 to -12 and -13 because -11 had
been taken by ..._HVM_VIRIDIAN in the meantime. -iwj ]
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Acked-by: Brendan Cully <brendan@cs.ubc.ca>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
This makes the interface consistent with the changes made to the main
interface in 21483:779c0ef9682c.
Also fix some references to "struct xc_interface" which should have
been simply "xc_interface" in tools/xenpaging, and update QEMU_TAG to
pull in the corresponding qemu change.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Move the function into struct save_callbacks with the others and add
the void *closure to the callback arguments.
Add and propagate an error return code from the callback.
Use this in libxl to pass the save context to
libxl__domain_suspend_common_switch_qemu_logdirty allowing us to reuse
the parent's xenstore handle, gc context etc.
Also add an apparently missing libxl__free_all to
libxl__domain_suspend_common.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
# User Ian Campbell <ian.campbell@citrix.com>
# Date 1282671421 -3600
# Node ID d1dd29a470ef1b9d2c77478a123326036dfe90bb
# Parent d7a4adad9c328decbd384d87b23001aea8951b86
tools/libxc, tools/libelf: Relicense under LGPL v2.1
Relicense these two libraries under LGPL v2.1 only except where
individual files already included the "or later" provision.
Copyright holders have been contacted by Stephen Spector and have all
agreed this change.
Removed tools/libxc/ia64/aclinux.h since it appeared to be
unused. There is a separate, more up to date, copy in
xen/include/acpi/platform/aclinux.h which does appear to be used.
Clarify the license of MiniOS privcmd.h under the same terms as other
tools/include/xen-sys headers.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stephen Spector <stephen.spector@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
This patch eliminate the global variables in libxenctrl (used for
logging and error reporting).
Instead the information which was in the global variables is now in a
new xc_interface* opaque structure, which xc_interface open returns
instead of the raw file descriptor; furthermore, logging is done via
xentoollog.
There are three new parameters to xc_interface_open to control the
logging, but existing callers can just pass "0" for all three to get
the old behaviour.
All libxc callers have been adjusted accordingly.
Also update QEMU_TAG for corresponding qemu change.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
This allows multiple guests to be migrated or protected by Remus
simultaneously.
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Acked-by: Brendan Cully <brendan@cs.ubc.ca>
The main idea of this patch is:
1) The admin sets aside some memory below 128G for 32-bit paravirtual
domain creation (via dom0_mem=-<value> in kernel comand line).
2) The admin also explicitly states to the tools (i..e xend) how much
memory is supposed to be left untouched by 64-bit domains
3) If a 32-bit pv DomU gets created, no ballooning ought to be
necessary (since if it is, no guarantee can be made about the address
range of the memory ballooned out), and memory gets allocated from the
reserved range.
4) Upon 64-bit (or 32-bit HVM or HVM) DomU creation, the tools
determine the amount of memory to be ballooned out of Dom0 by adding
the amount needed for the new guest and the amount still in the
reserved pool (and then of course subtracting the total amount of
memory the hypervisor has available for guest use).
Signed-off-by: james song (wei) <jsong@novell.com>
* Add necessary logging dirty in qemu to avoid guest error with
intensive disk access when live migration
* Take place of shared memory between qemu and migration tools by new
added hypercall, which is clean and simple
Signed-Off-By: Zhai, Edwin <edwin.zhai@intel.com>
This patch support exchange a page for a suspended PV guest from user
space.
The basic idea to offline a page is:
1) mark a page offline pending
2) If the page is owned by a HVM domain, user have to live migrate it.
In future, with stub-domain support, we can also exchange the page
without migration.
3) If the page is owned by a PV domain, we will try to exchange the
offline pending page to a new one and free the old page.
This patch achieves item 3.
The method to exchange the offline pending page for PV domain is:
1) Suspend the guest.
2) If the page is being granted out, return with offline pending.
3) Get a copy for the content
4) Scan all page table page to see if any reference to the offending
page, if yes, make the entry to be non-present to reduce the reference
count.
5) After update all page tables, user space tools will try to exchange
the old page. If the new mfn has no reference anymore (i.e.
count_info & count_mask =3D 1), the exchange will allocate a new page,
update the m2p and return success, otherwise it will return fail.
6) If step 5 is success, user space tools will update the content of
the new page change the p2m table, and change all entries scaned in
step 4 to point to new entry.
if step failed, it will try to undo step 4 to revert page table.
7) Resume the guest.
Please refer to thread in
http://www.mailinglistarchive.com/xen-devel@lists.xensource.com/msg63084.html
for more information.
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
This patch adds the option "superpages" to the domain configuration
file. If it is set, the domain is populated using 2M pages.
This code does not support fallback to small pages. If the domain can
not be created with 2M pages, the create will fail.
The patch also includes support for saving and restoring domains with
the superpage flag set. However, if a domain has freed small pages
within its physical page array and then extended the array, the
restore will fill in those freed pages. It will then attempt to
allocate more than its memory limit and will fail. This is
significant because apparently Linux does this during boot, thus a
freshly booted Linux image can not be saved and restored successfully.
Signed-off-by: Dave McCracken <dcm@mccr.org>
Implement libxc interface to PoD functionality:
* Add xc_hvm_build_target_mem(), which takes both memsize and target.
Memsize is the total memory, allocated in PoD pages and reported in
the e820; target is the size of the cache. If these are the same, the
normal funcitonality is called. (So you can use the same function to
build always, and it will decide whether to use PoD or not.)
* Add xc_domain_memory_[gs]et_pod_target(), which sets and/or returns
information about the PoD cache and p2m entries.
Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Not working yet as we are a bit too keen to kill the qemu-dm process,
before we know that the save has been successful.
Signed-off-by: Keir Fraser <keir@xensource.com>
into xc_domain_save, like we did for xc_domain_restore
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>
--HG--
rename : tools/libxc/xc_linux_save.c => tools/libxc/xc_domain_save.c
into one function (and one file) since they share a lot of code
Signed-off-by: Tim Deegan <Tim.Deegan@øensource.com>
--HG--
rename : tools/libxc/xc_linux_restore.c => tools/libxc/xc_domain_restore.c
Make the differences clearer between the number of frames, the max PFN
and the size of the pfn array, and handle te framebuffer more cleanly.
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>
These have been used interchangeably, which is OK for PV domains but
not for HVM. This fixes an over-allocation by 256MB when restoring
HVM guests that have more than 4GB of RAM.
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>
in a HVM restore. In particular, don't print an uninitialized stack
variable, which causes XMLRPC exceptions in xend.
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>
It's a long story, but basically a small divergence in xenppc-unstable meant a
large number of changesets couldn't be directly imported to xen-unstable, so
this changeset includes all of them.
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
The following patch addes a Prose domain builder. For the moment it
is a clone of the linux ppc64 builder but will diverge quickly.
Signed-off-by: Jonathan Appavoo <jappavoo@us.ibm.com>
Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Also simplify the HVM builder interface by doing more work in
the python wrapper, and fix mapping of shared_info page after the
change to map foreign pages by GMFN rather than MFN.
Signed-off-by: Keir Fraser <keir@xensource.com>
and extra code in hvm_vcpu_initialise(). Remove 'apic' config
option -- HVM CPUs will always have an APIC (which should be
set up in virtual wire mode for backward compatibility, just as
in a real system).
Signed-off-by: Keir Fraser <keir@xensource.com>
ramdisks to be passed via buffer, rather than via file. This allows
usage of the underlying domain building routines in "file-challenged"
enviroments.
Specifically, xc_linux_build_mem is the buffer oriented version of the
file-oriented xc_linux_build. Likewise, xc_hvm_build_mem is the
buffer oriented analog of the file based xc_hvm_build.
Signed-off-by: Ben Thomas (bthomas@virtualiron.com)
Guest configuration files may now contain a features= declaration
listing the features which should be enabled in a | separated
list.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
This option is disabled by default, only if we have "pae=1" in config
file, cpuid will return PAE available to VMX guest, and Linux PAE VMX
guest need this. Once the PAE VMX guest support is stable, we will
enable it by default.
Signed-off-by: Xin Li <xin.b.li@intel.com>
Signed-off-by: Jun Nakajima <jun.nakajima@intel.com>
Shriram Rajagopalan
Stefano Stabellini
Ian Campbell
Keir Fraser
kfraser@localhost.localdomain
Tim Deegan
Steven Hand
Hollis Blanchard
Jimi Xenidis
kaf24@localhost.localdomain
kaf24@firebug.cl.cam.ac.uk
Ian.Campbell@xensource.com