diff options
| author | Ingo Molnar <mingo@elte.hu> | 2011-09-26 12:53:42 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-09-26 12:54:28 +0200 |
| commit | ed3982cf3748b657ffb79d9d1c2e4a562661db2d (patch) | |
| tree | 6e3654f460e23aa1b1512896aa3f03886a69be1b /arch/x86/xen/setup.c | |
| parent | cba9bd22a5f8f857534b9a7f3fb3cafa0ac5fb75 (diff) | |
| parent | d93dc5c4478c1fd5de85a3e8aece9aad7bbae044 (diff) | |
Merge commit 'v3.1-rc7' into perf/core
Merge reason: Pick up the latest upstream fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/xen/setup.c')
| -rw-r--r-- | arch/x86/xen/setup.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index df118a825f3..46d6d21dbdb 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -184,6 +184,19 @@ static unsigned long __init xen_set_identity(const struct e820entry *list, PFN_UP(start_pci), PFN_DOWN(last)); return identity; } + +static unsigned long __init xen_get_max_pages(void) +{ + unsigned long max_pages = MAX_DOMAIN_PAGES; + domid_t domid = DOMID_SELF; + int ret; + + ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid); + if (ret > 0) + max_pages = ret; + return min(max_pages, MAX_DOMAIN_PAGES); +} + /** * machine_specific_memory_setup - Hook for machine specific memory setup. **/ @@ -292,6 +305,14 @@ char * __init xen_memory_setup(void) sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); + extra_limit = xen_get_max_pages(); + if (max_pfn + extra_pages > extra_limit) { + if (extra_limit > max_pfn) + extra_pages = extra_limit - max_pfn; + else + extra_pages = 0; + } + extra_pages += xen_return_unused_memory(xen_start_info->nr_pages, &e820); /* |