From: Anatoly Burakov Date: Fri, 13 Jun 2014 14:52:50 +0000 (+0100) Subject: mem: make --no-huge use mmap instead of malloc X-Git-Tag: spdx-start~10740 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=f15addb79ebc4f192c4025aab1729bbd8fd7bc7b;p=dpdk.git mem: make --no-huge use mmap instead of malloc This makes it possible to run DPDK without hugepage memory when VFIO is used, as VFIO uses virtual addresses to set up DMA mappings. Technically, malloc is just fine, but we want to guarantee that memory will be page-aligned, so using mmap to be safe. Signed-off-by: Anatoly Burakov Acked-by: Thomas Monjalon --- diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c index d9cfb0967b..ae43f9eadb 100644 --- a/lib/librte_eal/linuxapp/eal/eal_memory.c +++ b/lib/librte_eal/linuxapp/eal/eal_memory.c @@ -1031,7 +1031,13 @@ rte_eal_hugepage_init(void) /* hugetlbfs can be disabled */ if (internal_config.no_hugetlbfs) { - addr = malloc(internal_config.memory); + addr = mmap(NULL, internal_config.memory, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); + if (addr == MAP_FAILED) { + RTE_LOG(ERR, EAL, "%s: mmap() failed: %s\n", __func__, + strerror(errno)); + return -1; + } mcfg->memseg[0].phys_addr = (phys_addr_t)(uintptr_t)addr; mcfg->memseg[0].addr = addr; mcfg->memseg[0].len = internal_config.memory;