This adds a "--legacy-mem" command-line switch. It will be used to
go back to the old memory behavior, one where we can't dynamically
allocate/free memory (the downside), but one where the user can
get physically contiguous memory, like before (the upside).
For now, nothing but the legacy behavior exists, non-legacy
memory init sequence will be added later.
Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
---
lib/librte_eal/common/eal_common_options.c | 4 ++++
lib/librte_eal/common/eal_internal_cfg.h | 3 +++
lib/librte_eal/common/eal_options.h | 2 ++
lib/librte_eal/linuxapp/eal/eal.c | 1 +
lib/librte_eal/linuxapp/eal/eal_memory.c | 22 ++++++++++++++++++----
5 files changed, 28 insertions(+), 4 deletions(-)
diff --git a/lib/librte_eal/common/eal_common_options.c
b/lib/librte_eal/common/eal_common_options.c
index c3f7c41..88ff35a 100644
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -99,6 +99,7 @@ eal_long_options[] = {
{OPT_VFIO_INTR, 1, NULL, OPT_VFIO_INTR_NUM },
{OPT_VMWARE_TSC_MAP, 0, NULL, OPT_VMWARE_TSC_MAP_NUM },
{OPT_SINGLE_FILE_SEGMENTS, 0, NULL, OPT_SINGLE_FILE_SEGMENTS_NUM},
+ {OPT_LEGACY_MEM, 0, NULL, OPT_LEGACY_MEM_NUM },
{0, 0, NULL, 0 }
};
@@ -1162,6 +1163,9 @@ eal_parse_common_option(int opt, const char *optarg,
case OPT_SINGLE_FILE_SEGMENTS_NUM:
conf->single_file_segments = 1;
break;
+ case OPT_LEGACY_MEM_NUM:
+ conf->legacy_mem = 1;
+ break;
/* don't know what to do, leave this to caller */
default:
diff --git a/lib/librte_eal/common/eal_internal_cfg.h
b/lib/librte_eal/common/eal_internal_cfg.h
index 484a32e..62ab15b 100644
--- a/lib/librte_eal/common/eal_internal_cfg.h
+++ b/lib/librte_eal/common/eal_internal_cfg.h
@@ -79,6 +79,9 @@ struct internal_config {
volatile unsigned single_file_segments;
/**< true if storing all pages within single files (per-page-size,
* per-node). */
+ volatile unsigned legacy_mem;
+ /**< true to enable legacy memory behavior (no dynamic allocation,
+ * contiguous segments). */
volatile int syslog_facility; /**< facility passed to openlog() */
/** default interrupt mode for VFIO */
volatile enum rte_intr_mode vfio_intr_mode;
diff --git a/lib/librte_eal/common/eal_options.h
b/lib/librte_eal/common/eal_options.h
index 26a682a..d09b034 100644
--- a/lib/librte_eal/common/eal_options.h
+++ b/lib/librte_eal/common/eal_options.h
@@ -85,6 +85,8 @@ enum {
OPT_VMWARE_TSC_MAP_NUM,
#define OPT_SINGLE_FILE_SEGMENTS "single-file-segments"
OPT_SINGLE_FILE_SEGMENTS_NUM,
+#define OPT_LEGACY_MEM "legacy-mem"
+ OPT_LEGACY_MEM_NUM,
OPT_LONG_MAX_NUM
};
diff --git a/lib/librte_eal/linuxapp/eal/eal.c
b/lib/librte_eal/linuxapp/eal/eal.c
index 2a3127f..37ae8e0 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -367,6 +367,7 @@ eal_usage(const char *prgname)
" --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by
hotplug)\n"
" --"OPT_VFIO_INTR" Interrupt mode for VFIO
(legacy|msi|msix)\n"
" --"OPT_SINGLE_FILE_SEGMENTS" Put all hugepage memory in
single files\n"
+ " --"OPT_LEGACY_MEM" Legacy memory mode (no dynamic
allocation, contiguous segments)\n"
"\n");
/* Allow the application to print its usage message too if hook is set
*/
if ( rte_application_usage_hook ) {
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c
b/lib/librte_eal/linuxapp/eal/eal_memory.c
index dd18d98..5b18af9 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -940,8 +940,8 @@ huge_recover_sigbus(void)
* 6. unmap the first mapping
* 7. fill memsegs in configuration with contiguous zones
*/
-int
-rte_eal_hugepage_init(void)
+static int
+eal_legacy_hugepage_init(void)
{
struct rte_mem_config *mcfg;
struct hugepage_file *hugepage = NULL, *tmp_hp = NULL;
@@ -1283,8 +1283,8 @@ getFileSize(int fd)
* configuration and finds the hugepages which form that segment, mapping them
* in order to form a contiguous block in the virtual memory space
*/
-int
-rte_eal_hugepage_attach(void)
+static int
+eal_legacy_hugepage_attach(void)
{
const struct rte_mem_config *mcfg =
rte_eal_get_configuration()->mem_config;
struct hugepage_file *hp = NULL;
@@ -1435,6 +1435,20 @@ rte_eal_hugepage_attach(void)
}
int
+rte_eal_hugepage_init(void) {
+ if (internal_config.legacy_mem)
+ return eal_legacy_hugepage_init();
+ return -1;
+}
+
+int
+rte_eal_hugepage_attach(void) {
+ if (internal_config.legacy_mem)
+ return eal_legacy_hugepage_attach();
+ return -1;
+}
+
+int
rte_eal_using_phys_addrs(void)
{
return phys_addrs_available;
--
2.7.4
