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| author | James Morris <jmorris@namei.org> | 2011-01-09 23:46:24 +0100 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2011-01-09 23:46:24 +0100 |
| commit | d2e7ad19229f982fc1eb731827d82ceac90abfb3 (patch) | |
| tree | 98a3741b4d4b27a48b3c7ea9babe331e539416a8 /drivers/xen/balloon.c | |
| parent | MAINTAINERS: Add tomoyo-dev-en ML. (diff) | |
| parent | Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/... (diff) | |
| download | linux-d2e7ad19229f982fc1eb731827d82ceac90abfb3.tar.xz linux-d2e7ad19229f982fc1eb731827d82ceac90abfb3.zip | |
Merge branch 'master' into next
Conflicts:
security/smack/smack_lsm.c
Verified and added fix by Stephen Rothwell <sfr@canb.auug.org.au>
Ok'd by Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: James Morris <jmorris@namei.org>
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; |