[Xen-devel] xen: memory initialization/balloon fixes (#3)

[David Vrabel <david.vrabel@xxxxxxxxxx>]

This set of patches fixes some bugs in the memory initialization under
Xen and in Xen's memory balloon driver.  They can make 100s of MB of
additional RAM available (depending on the system/configuration).

Patch 1 is already applied.

Patch 2 fixes a bug in patch 1 and should be queued for 3.1 (and along
with patch 1 considered for 3.0 stable).

Patch 3 is a bug fix and should be queued for 3.1 and possibly
queued for the 3.0 stable tree.

Patches 5 & 6 increase the amount of low memory in 32 bit domains
started with < 1 GiB of RAM.  Please queue for 3.2

Patch 7 releases all pages in the initial allocation with PFNs that
lie within a 1-1 mapping.  This seems correct to me as I think that
once the 1-1 mapping is set the MFN of the original page is lost so
it's no longer accessible by the kernel (and it cannot be used by
another domain

Changes since #2:

- New patch: xen: avoid adding non-existant memory if the reservation
  is unlimited
- Avoid using a hypercall to get the current number of pages in the
  ballon driver.  Apparently the hypercall won't return the right
  value if paging is used.
- Addresses Konrad's review comments.

David


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel