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xen/balloon: Set balloon's initial state to number of existing RAM pages 

Currently balloon's initial value is set to max_pfn which includes
non-RAM ranges such as MMIO hole. As result, initial memory target
(specified by guest's configuration file) will appear smaller than
what balloon driver perceives to be the current number of available
pages. Thus it will balloon down "extra" pages, decreasing amount of
available memory for no good reason.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Boris Ostrovsky 2013-11-06 15:37:40 -05:00 committed by Konrad Rzeszutek Wilk
parent 8deb3eb146
commit c275a57f5e
1 changed files with 1 additions and 1 deletions
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2
drivers/xen/balloon.c
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@ -641,7 +641,7 @@ static int __init balloon_init(void)
balloon_stats.current_pages = xen_pv_domain()
? min(xen_start_info->nr_pages - xen_released_pages, max_pfn)
: max_pfn;
: get_num_physpages();
balloon_stats.target_pages = balloon_stats.current_pages;
balloon_stats.balloon_low = 0;
balloon_stats.balloon_high = 0;