The patch titled Subject: mm/memblock: truncate memblock if necessary has been removed from the -mm tree. Its filename was mm-memblock-truncate-memblock-if-necessary.patch This patch was dropped because an updated version will be merged ------------------------------------------------------ From: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx> Subject: mm/memblock: truncate memblock if necessary While enforcing memory limit on current memblock layout, it is possible that we don't have to change the current memblock layout. For example, the enforced limited size is bigger than the maximal address of memory regions. Also, we don't have to change the memory layout while the enforced limited size is more than the accumulative size of all memory regions. The patch checks them and won't change current memblock layout for those cases, thus to reduce some overhead. Signed-off-by: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx> Signed-off-by: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxx> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Cc: Minchan Kim <minchan@xxxxxxxxxx> Cc: Yinghai Lu <yinghai@xxxxxxxxxx> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memblock.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff -puN mm/memblock.c~mm-memblock-truncate-memblock-if-necessary mm/memblock.c --- a/mm/memblock.c~mm-memblock-truncate-memblock-if-necessary +++ a/mm/memblock.c @@ -844,14 +844,14 @@ void __init memblock_enforce_memory_limi unsigned long i; phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; - if (!limit) + if (!limit || limit >= memblock_end_of_DRAM()) return; /* find out max address */ for (i = 0; i < memblock.memory.cnt; i++) { struct memblock_region *r = &memblock.memory.regions[i]; - if (limit <= r->size) { + if (limit < r->size) { max_addr = r->base + limit; break; } @@ -859,8 +859,12 @@ void __init memblock_enforce_memory_limi } /* truncate both memory and reserved regions */ - __memblock_remove(&memblock.memory, max_addr, (phys_addr_t)ULLONG_MAX); - __memblock_remove(&memblock.reserved, max_addr, (phys_addr_t)ULLONG_MAX); + if (max_addr < (phys_addr_t)ULLONG_MAX) { + __memblock_remove(&memblock.memory, max_addr, + (phys_addr_t)ULLONG_MAX); + __memblock_remove(&memblock.reserved, max_addr, + (phys_addr_t)ULLONG_MAX); + } } static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) _ Patches currently in -mm which might be from shangw@xxxxxxxxxxxxxxxxxx are mm-slab-remove-duplicate-check.patch mm-mmu_notifier-init-notifier-if-necessary.patch mm-memblock-rename-get_allocated_memblock_reserved_regions_info.patch mm-memblock-use-existing-interface-to-set-nid.patch mm-memblock-cleanup-early_node_map-related-comments.patch mm-vmscan-fix-error-number-for-failed-kthread.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html