[PATCH v2 02/20] mem: rework malloc heap init

[David Marchand <david.marchand@redhat.com>]

rte_eal_memory_init() and rte_eal_malloc_heap_init() must be called in
a common section taking rte_mcfg_mem_read_lock().
Split rte_eal_malloc_heap_init() in two so that the mem lock is taken
in rte_eal_init() making lock checks trivial (once annotated in the next
patch).

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
 lib/eal/common/eal_common_memory.c | 10 +---------
 lib/eal/common/malloc_heap.c       | 10 ++++++----
 lib/eal/common/malloc_heap.h       |  3 +++
 lib/eal/freebsd/eal.c              | 13 +++++++++++++
 lib/eal/linux/eal.c                | 13 +++++++++++++
 lib/eal/windows/eal.c              | 13 +++++++++++++
 6 files changed, 49 insertions(+), 13 deletions(-)

diff --git a/lib/eal/common/eal_common_memory.c b/lib/eal/common/eal_common_memory.c
index c917b981bc..5e162a1092 100644
--- a/lib/eal/common/eal_common_memory.c
+++ b/lib/eal/common/eal_common_memory.c
@@ -1078,18 +1078,11 @@ rte_eal_memory_detach(void)
 int
 rte_eal_memory_init(void)
 {
-	struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 	const struct internal_config *internal_conf =
 		eal_get_internal_configuration();
-
 	int retval;
-	RTE_LOG(DEBUG, EAL, "Setting up physically contiguous memory...\n");
-
-	if (!mcfg)
-		return -1;
 
-	/* lock mem hotplug here, to prevent races while we init */
-	rte_mcfg_mem_read_lock();
+	RTE_LOG(DEBUG, EAL, "Setting up physically contiguous memory...\n");
 
 	if (rte_eal_memseg_init() < 0)
 		goto fail;
@@ -1108,7 +1101,6 @@ rte_eal_memory_init(void)
 
 	return 0;
 fail:
-	rte_mcfg_mem_read_unlock();
 	return -1;
 }
 
diff --git a/lib/eal/common/malloc_heap.c b/lib/eal/common/malloc_heap.c
index cc84dce672..7498a05ed3 100644
--- a/lib/eal/common/malloc_heap.c
+++ b/lib/eal/common/malloc_heap.c
@@ -1442,18 +1442,20 @@ rte_eal_malloc_heap_init(void)
 		}
 	}
 
-
 	if (register_mp_requests()) {
 		RTE_LOG(ERR, EAL, "Couldn't register malloc multiprocess actions\n");
-		rte_mcfg_mem_read_unlock();
 		return -1;
 	}
 
-	/* unlock mem hotplug here. it's safe for primary as no requests can
+	return 0;
+}
+
+int rte_eal_malloc_heap_populate(void)
+{
+	/* mem hotplug is unlocked here. it's safe for primary as no requests can
 	 * even come before primary itself is fully initialized, and secondaries
 	 * do not need to initialize the heap.
 	 */
-	rte_mcfg_mem_read_unlock();
 
 	/* secondary process does not need to initialize anything */
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
diff --git a/lib/eal/common/malloc_heap.h b/lib/eal/common/malloc_heap.h
index 3b2fbc0aa0..8f3ab57154 100644
--- a/lib/eal/common/malloc_heap.h
+++ b/lib/eal/common/malloc_heap.h
@@ -85,6 +85,9 @@ malloc_socket_to_heap_id(unsigned int socket_id);
 int
 rte_eal_malloc_heap_init(void);
 
+int
+rte_eal_malloc_heap_populate(void);
+
 void
 rte_eal_malloc_heap_cleanup(void);
 
diff --git a/lib/eal/freebsd/eal.c b/lib/eal/freebsd/eal.c
index 7db4239c51..7daf22e314 100644
--- a/lib/eal/freebsd/eal.c
+++ b/lib/eal/freebsd/eal.c
@@ -26,6 +26,7 @@
 #include <rte_memory.h>
 #include <rte_launch.h>
 #include <rte_eal.h>
+#include <rte_eal_memconfig.h>
 #include <rte_errno.h>
 #include <rte_per_lcore.h>
 #include <rte_lcore.h>
@@ -754,13 +755,25 @@ rte_eal_init(int argc, char **argv)
 		return -1;
 	}
 
+	rte_mcfg_mem_read_lock();
+
 	if (rte_eal_memory_init() < 0) {
+		rte_mcfg_mem_read_unlock();
 		rte_eal_init_alert("Cannot init memory");
 		rte_errno = ENOMEM;
 		return -1;
 	}
 
 	if (rte_eal_malloc_heap_init() < 0) {
+		rte_mcfg_mem_read_unlock();
+		rte_eal_init_alert("Cannot init malloc heap");
+		rte_errno = ENODEV;
+		return -1;
+	}
+
+	rte_mcfg_mem_read_unlock();
+
+	if (rte_eal_malloc_heap_populate() < 0) {
 		rte_eal_init_alert("Cannot init malloc heap");
 		rte_errno = ENODEV;
 		return -1;
diff --git a/lib/eal/linux/eal.c b/lib/eal/linux/eal.c
index fabafbc39b..7242ee2c9a 100644
--- a/lib/eal/linux/eal.c
+++ b/lib/eal/linux/eal.c
@@ -30,6 +30,7 @@
 #include <rte_memory.h>
 #include <rte_launch.h>
 #include <rte_eal.h>
+#include <rte_eal_memconfig.h>
 #include <rte_errno.h>
 #include <rte_lcore.h>
 #include <rte_service_component.h>
@@ -1197,7 +1198,10 @@ rte_eal_init(int argc, char **argv)
 		return -1;
 	}
 
+	rte_mcfg_mem_read_lock();
+
 	if (rte_eal_memory_init() < 0) {
+		rte_mcfg_mem_read_unlock();
 		rte_eal_init_alert("Cannot init memory");
 		rte_errno = ENOMEM;
 		return -1;
@@ -1207,6 +1211,15 @@ rte_eal_init(int argc, char **argv)
 	eal_hugedirs_unlock();
 
 	if (rte_eal_malloc_heap_init() < 0) {
+		rte_mcfg_mem_read_unlock();
+		rte_eal_init_alert("Cannot init malloc heap");
+		rte_errno = ENODEV;
+		return -1;
+	}
+
+	rte_mcfg_mem_read_unlock();
+
+	if (rte_eal_malloc_heap_populate() < 0) {
 		rte_eal_init_alert("Cannot init malloc heap");
 		rte_errno = ENODEV;
 		return -1;
diff --git a/lib/eal/windows/eal.c b/lib/eal/windows/eal.c
index e7d405b91c..033825c14c 100644
--- a/lib/eal/windows/eal.c
+++ b/lib/eal/windows/eal.c
@@ -12,6 +12,7 @@
 #include <rte_debug.h>
 #include <rte_bus.h>
 #include <rte_eal.h>
+#include <rte_eal_memconfig.h>
 #include <eal_memcfg.h>
 #include <rte_errno.h>
 #include <rte_lcore.h>
@@ -387,13 +388,25 @@ rte_eal_init(int argc, char **argv)
 		return -1;
 	}
 
+	rte_mcfg_mem_read_lock();
+
 	if (rte_eal_memory_init() < 0) {
+		rte_mcfg_mem_read_unlock();
 		rte_eal_init_alert("Cannot init memory");
 		rte_errno = ENOMEM;
 		return -1;
 	}
 
 	if (rte_eal_malloc_heap_init() < 0) {
+		rte_mcfg_mem_read_unlock();
+		rte_eal_init_alert("Cannot init malloc heap");
+		rte_errno = ENODEV;
+		return -1;
+	}
+
+	rte_mcfg_mem_read_unlock();
+
+	if (rte_eal_malloc_heap_populate() < 0) {
 		rte_eal_init_alert("Cannot init malloc heap");
 		rte_errno = ENODEV;
 		return -1;
-- 
2.39.2