[Xen-devel] [PATCH] Fix balloon driver for auto_translated_physmap guests

[Aravind Menon <aravind.menon@xxxxxxx>]

For guest domains running in auto_translated mode, the domain builder
maps the guest grant table at the end of its physmap, i.e. from page
frame 'nr_pages' to page frame 'nr_pages + NR_GRANT_FRAMES'.

However, the balloon driver, on initialization, appends all page frames
from 'nr_pages' to 'max_pfn' to its ballooned_pages list (this includes
the grant table page frames). This ballooned_pages list is subsequently
used for increasing memory reservation. 

Thus for auto_translated guests, the balloon driver remaps the grant
table page frames when it tries to increase the memory reservation.

The attached patch fixes the balloon driver for auto_translated mode.

Signed-off-by: Aravind Menon <aravind.menon@xxxxxxxxxx>

Attachment: balloon.patch
Description: Text Data

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