Messages in this thread Patch in this message | | | From | Laura Abbott <> | Subject | [PATCH] arm: Don't use memblock limit for the lowmem bound | Date | Mon, 11 May 2015 19:53:41 -0700 |
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From: Laura Abbott <labbott@redhat.com>
The memblock limit is currently used in find_limits to find the bounds for ZONE_NORMAL. The memblock limit may need to be rounded down a PMD size to ensure allocations are fully mapped though. This has the side effect of reducing the amount of memory in ZONE_NORMAL. Since we generally want to optimize for more lowmem, fix this by using arm_lowmem_limit to calculate the bounds. This what is used for actually mapping lowmem anyway.
Before: # cat /proc/zoneinfo | grep managed managed 62920
After: # cat /proc/zoneinfo | grep managed managed 63336
Signed-off-by: Laura Abbott <labbott@redhat.com> --- arch/arm/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index be92fa0..b4f9513 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -89,7 +89,7 @@ __tagtable(ATAG_INITRD2, parse_tag_initrd2); static void __init find_limits(unsigned long *min, unsigned long *max_low, unsigned long *max_high) { - *max_low = PFN_DOWN(memblock_get_current_limit()); + *max_low = PFN_DOWN(arm_lowmem_limit); *min = PFN_UP(memblock_start_of_DRAM()); *max_high = PFN_DOWN(memblock_end_of_DRAM()); } -- 2.1.0
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