[dpdk-dev] [PATCH v3 5/6] app/testpmd: add rte_mem_lockall in librte_eal

[Jie Zhou]

In order to replace POSIX mman APIs in testpmd, add rte_mem_lockall.
- On Unix, it is a wrapper of mlockall
- On Windows, it is just a stub

Signed-off-by: Jie Zhou <jizh at microsoft.com>
Signed-off-by: Jie Zhou <jizh at linux.microsoft.com>
---
 lib/librte_eal/include/rte_eal_paging.h | 20 ++++++++++++++++++++
 lib/librte_eal/unix/eal_unix_memory.c   | 13 +++++++++++++
 lib/librte_eal/version.map              |  1 +
 lib/librte_eal/windows/eal_memory.c     | 10 ++++++++++
 4 files changed, 44 insertions(+)

diff --git a/lib/librte_eal/include/rte_eal_paging.h b/lib/librte_eal/include/rte_eal_paging.h
index ed98e70e9..959c2e135 100644
--- a/lib/librte_eal/include/rte_eal_paging.h
+++ b/lib/librte_eal/include/rte_eal_paging.h
@@ -37,6 +37,14 @@ enum rte_map_flags {
 	RTE_MAP_FORCE_ADDRESS = 1 << 3
 };
 
+/** Flags for memory lockall. */
+enum rte_mem_lockall_flags {
+	/** Lock all pages currently mapped into process's address space. */
+	RTE_MCL_CURRENT = 1 << 0,
+	/** Lock all pages mapped into process's address space in the future.*/
+	RTE_MCL_FUTURE = 1 << 1
+};
+
 /**
  * Map a portion of an opened file or the page file into memory.
  *
@@ -96,3 +104,15 @@ rte_mem_page_size(void);
 __rte_internal
 int
 rte_mem_lock(const void *virt, size_t size);
+
+/**
+ * locks all pages mapped into the address space of the calling process.
+ *
+ * @param flags
+ *  Memory lockall flags, a combination of rte_mem_lockall_flags.
+ * @return
+ *   0 on success, negative on error.
+ */
+__rte_internal
+int
+rte_mem_lockall(int flags);
diff --git a/lib/librte_eal/unix/eal_unix_memory.c b/lib/librte_eal/unix/eal_unix_memory.c
index ec7156df9..90e0c547a 100644
--- a/lib/librte_eal/unix/eal_unix_memory.c
+++ b/lib/librte_eal/unix/eal_unix_memory.c
@@ -150,3 +150,16 @@ rte_mem_lock(const void *virt, size_t size)
 		rte_errno = errno;
 	return ret;
 }
+
+int
+rte_mem_lockall(int flags)
+{
+	int mlockall_flags = 0;
+
+	if (flags & RTE_MCL_CURRENT)
+		mlockall_flags |= MCL_CURRENT;
+	if (flags & RTE_MCL_FUTURE)
+		mlockall_flags |= MCL_FUTURE;
+
+	return mlockall(mlockall_flags);
+}
diff --git a/lib/librte_eal/version.map b/lib/librte_eal/version.map
index e7217ae28..8dd8333e5 100644
--- a/lib/librte_eal/version.map
+++ b/lib/librte_eal/version.map
@@ -431,4 +431,5 @@ INTERNAL {
 	rte_mem_map;
 	rte_mem_page_size;
 	rte_mem_unmap;
+	rte_mem_lockall;
 };
diff --git a/lib/librte_eal/windows/eal_memory.c b/lib/librte_eal/windows/eal_memory.c
index 2cf5a5e64..4fe7e59a1 100644
--- a/lib/librte_eal/windows/eal_memory.c
+++ b/lib/librte_eal/windows/eal_memory.c
@@ -715,3 +715,13 @@ rte_eal_hugepage_attach(void)
 	EAL_LOG_NOT_IMPLEMENTED();
 	return -1;
 }
+
+int
+rte_mem_lockall(int flags)
+{
+	RTE_SET_USED(flags);
+
+	EAL_LOG_NOT_IMPLEMENTED();
+
+	return -1;
+}
-- 
2.30.0.vfs.0.2