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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2011-01-03 10:15:11 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-01-03 10:15:11 +0100 |
| commit | 1fef891761ddcbd7e57ec3961a0fb748003222ac (patch) | |
| tree | d192f1677521e17f1a943f8df570dd6449aa0da8 /drivers/xen/balloon.c | |
| parent | d3d4b60b12369eded0ea0c5dffee0888ec4d80cd (diff) | |
| parent | 1d3f33d541312acd34bd2fa780396d111a0f73b1 (diff) | |
Merge branch 'sgu/mxs-core-v8' of git://git.pengutronix.de/git/ukl/linux-2.6 into imx-for-2.6.38-new
Diffstat (limited to 'drivers/xen/balloon.c')
| -rw-r--r-- | drivers/xen/balloon.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 2b17ad5b4b32..43f9f02c7db0 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -412,8 +412,16 @@ static int __init balloon_init(void) register_balloon(&balloon_sysdev); - /* Initialise the balloon with excess memory space. */ - extra_pfn_end = min(e820_end_of_ram_pfn(), + /* + * Initialise the balloon with excess memory space. We need + * to make sure we don't add memory which doesn't exist or + * logically exist. The E820 map can be trimmed to be smaller + * than the amount of physical memory due to the mem= command + * line parameter. And if this is a 32-bit non-HIGHMEM kernel + * on a system with memory which requires highmem to access, + * don't try to use it. + */ + extra_pfn_end = min(min(max_pfn, e820_end_of_ram_pfn()), (unsigned long)PFN_DOWN(xen_extra_mem_start + xen_extra_mem_size)); for (pfn = PFN_UP(xen_extra_mem_start); pfn < extra_pfn_end; |