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authorDavid S. Miller <davem@davemloft.net>2014-09-27 11:05:21 -0700
committerDavid S. Miller <davem@davemloft.net>2014-10-05 16:53:40 -0700
commitbb4e6e85daa52a9f6210fa06a5ec6269598a202b (patch)
tree4ffffa2e95e5ad28c35762da8d9d7bcafce57052 /arch/sparc/mm
parent7c0fa0f24bb76ce3d67be7f737b799846a04570f (diff)
downloadlinux-bb4e6e85daa52a9f6210fa06a5ec6269598a202b.tar.gz
sparc64: Adjust vmalloc region size based upon available virtual address bits.
In order to accomodate embedded per-cpu allocation with large numbers of cpus and numa nodes, we have to use as much virtual address space as possible for the vmalloc region. Otherwise we can get things like: PERCPU: max_distance=0x380001c10000 too large for vmalloc space 0xff00000000 So, once we select a value for PAGE_OFFSET, derive the size of the vmalloc region based upon that. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Bob Picco <bob.picco@oracle.com>
Diffstat (limited to 'arch/sparc/mm')
-rw-r--r--arch/sparc/mm/init_64.c30
1 files changed, 19 insertions, 11 deletions
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index e0c1206a44fa..0ead74b2b9e3 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -1369,25 +1369,24 @@ static unsigned long max_phys_bits = 40;
bool kern_addr_valid(unsigned long addr)
{
- unsigned long above = ((long)addr) >> max_phys_bits;
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
- if (above != 0 && above != -1UL)
- return false;
-
- if (addr >= (unsigned long) KERNBASE &&
- addr < (unsigned long)&_end)
- return true;
-
- if (addr >= PAGE_OFFSET) {
+ if ((long)addr < 0L) {
unsigned long pa = __pa(addr);
+ if ((addr >> max_phys_bits) != 0UL)
+ return false;
+
return pfn_valid(pa >> PAGE_SHIFT);
}
+ if (addr >= (unsigned long) KERNBASE &&
+ addr < (unsigned long)&_end)
+ return true;
+
pgd = pgd_offset_k(addr);
if (pgd_none(*pgd))
return 0;
@@ -1656,6 +1655,9 @@ unsigned long __init find_ecache_flush_span(unsigned long size)
unsigned long PAGE_OFFSET;
EXPORT_SYMBOL(PAGE_OFFSET);
+unsigned long VMALLOC_END = 0x0000010000000000UL;
+EXPORT_SYMBOL(VMALLOC_END);
+
unsigned long sparc64_va_hole_top = 0xfffff80000000000UL;
unsigned long sparc64_va_hole_bottom = 0x0000080000000000UL;
@@ -1712,10 +1714,16 @@ static void __init setup_page_offset(void)
prom_halt();
}
- PAGE_OFFSET = PAGE_OFFSET_BY_BITS(max_phys_bits);
+ PAGE_OFFSET = sparc64_va_hole_top;
+ VMALLOC_END = ((sparc64_va_hole_bottom >> 1) +
+ (sparc64_va_hole_bottom >> 2));
- pr_info("PAGE_OFFSET is 0x%016lx (max_phys_bits == %lu)\n",
+ pr_info("MM: PAGE_OFFSET is 0x%016lx (max_phys_bits == %lu)\n",
PAGE_OFFSET, max_phys_bits);
+ pr_info("MM: VMALLOC [0x%016lx --> 0x%016lx]\n",
+ VMALLOC_START, VMALLOC_END);
+ pr_info("MM: VMEMMAP [0x%016lx --> 0x%016lx]\n",
+ VMEMMAP_BASE, VMEMMAP_BASE << 1);
}
static void __init tsb_phys_patch(void)