[dpdk-dev] [PATCH v2 11/16] Make --no-huge use mmap instead of malloc
Xu, HuilongX
huilongx.xu at intel.com
Tue May 27 05:28:01 CEST 2014
This makes it possible to run DPDK without hugepage memory when VFIO
is used, as VFIO uses virtual addresses to set up DMA mappings.
Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com<http://dpdk.org/ml/listinfo/dev>>
Test-by: HuilongX Xu huilongx.xu at intel.com<mailto:huilongx.xu at intel.com>
Compile pass
>>Compile OS: FC20 x86_64
>>Kernel version: 3.13.6-200
>>GCC version: 4.8.2
>>Server: Crownpass
---
lib/librte_eal/linuxapp/eal/eal_memory.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 5a10a80..3fc0d28 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;
--
1.7.0.7
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