[v5,04/11] eal/mem: extract common code for memseg list initialization
diff mbox series

Message ID 20200525003720.6410-5-dmitry.kozliuk@gmail.com
State Superseded
Delegated to: Thomas Monjalon
Headers show
Series
  • Windows basic memory management
Related show

Checks

Context Check Description
ci/Intel-compilation fail Compilation issues
ci/checkpatch success coding style OK

Commit Message

Dmitry Kozlyuk May 25, 2020, 12:37 a.m. UTC
All supported OS create memory segment lists (MSL) and reserve VA space
for them in a nearly identical way. Move common code into EAL private
functions to reduce duplication.

Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
---
 lib/librte_eal/common/eal_common_memory.c |  92 +++++++++++++++++
 lib/librte_eal/common/eal_private.h       |  62 ++++++++++++
 lib/librte_eal/freebsd/eal_memory.c       |  94 ++++--------------
 lib/librte_eal/linux/eal_memory.c         | 115 +++++-----------------
 4 files changed, 195 insertions(+), 168 deletions(-)

Comments

Thomas Monjalon May 28, 2020, 7:31 a.m. UTC | #1
25/05/2020 02:37, Dmitry Kozlyuk:
> All supported OS create memory segment lists (MSL) and reserve VA space
> for them in a nearly identical way. Move common code into EAL private
> functions to reduce duplication.
> 
> Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> ---
> +void
> +eal_memseg_list_populate(struct rte_memseg_list *msl, void *addr, int n_segs)
> +{
> +	uint64_t page_sz = msl->page_sz;
[...]
> +		addr = RTE_PTR_ADD(addr, page_sz);

This is an error in 32-bit compilation:

lib/librte_eal/common/eal_common_memory.c:
In function ‘eal_memseg_list_populate’: rte_common.h:215:30: error:
cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
  215 | #define RTE_PTR_ADD(ptr, x) ((void*)((uintptr_t)(ptr) + (x)))
      |                              ^

The original code was doing a cast to size_t.

> --- a/lib/librte_eal/linux/eal_memory.c
> +++ b/lib/librte_eal/linux/eal_memory.c
> -			addr = RTE_PTR_ADD(addr, (size_t)page_sz);

I believe the correct cast should be uintptr_t.
Maybe it would be even more correct to do this cast inside RTE_PTR_ADD?
Dmitry Kozlyuk May 28, 2020, 10:04 a.m. UTC | #2
On Thu, 28 May 2020 09:31:54 +0200
Thomas Monjalon <thomas@monjalon.net> wrote:

> 25/05/2020 02:37, Dmitry Kozlyuk:
> > All supported OS create memory segment lists (MSL) and reserve VA space
> > for them in a nearly identical way. Move common code into EAL private
> > functions to reduce duplication.
> > 
> > Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> > ---
> > +void
> > +eal_memseg_list_populate(struct rte_memseg_list *msl, void *addr, int n_segs)
> > +{
> > +	uint64_t page_sz = msl->page_sz;  
> [...]
> > +		addr = RTE_PTR_ADD(addr, page_sz);  
> 
> This is an error in 32-bit compilation:
> 
> lib/librte_eal/common/eal_common_memory.c:
> In function ‘eal_memseg_list_populate’: rte_common.h:215:30: error:
> cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
>   215 | #define RTE_PTR_ADD(ptr, x) ((void*)((uintptr_t)(ptr) + (x)))
>       |                              ^
> 
> The original code was doing a cast to size_t.
> 
> > --- a/lib/librte_eal/linux/eal_memory.c
> > +++ b/lib/librte_eal/linux/eal_memory.c
> > -			addr = RTE_PTR_ADD(addr, (size_t)page_sz);  
> 
> I believe the correct cast should be uintptr_t.
> Maybe it would be even more correct to do this cast inside RTE_PTR_ADD?

Ack, this is the issue I mentioned in the Community Call letter. I think
size_t is a more suitable type for page_*sz* than uintptr_t.
Burakov, Anatoly May 28, 2020, 11:46 a.m. UTC | #3
On 25-May-20 1:37 AM, Dmitry Kozlyuk wrote:
> All supported OS create memory segment lists (MSL) and reserve VA space
> for them in a nearly identical way. Move common code into EAL private
> functions to reduce duplication.
> 
> Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> ---

<snip>

> +eal_memseg_list_alloc(struct rte_memseg_list *msl, int reserve_flags)
> +{
> +	uint64_t page_sz;
> +	size_t mem_sz;
> +	void *addr;
> +
> +	page_sz = msl->page_sz;
> +	mem_sz = page_sz * msl->memseg_arr.len;
> +
> +	addr = eal_get_virtual_area(
> +		msl->base_va, &mem_sz, page_sz, 0, reserve_flags);
> +	if (addr == NULL) {
> +		if (rte_errno == EADDRNOTAVAIL)
> +			RTE_LOG(ERR, EAL, "Cannot reserve %llu bytes at [%p] - "
> +				"please use '--" OPT_BASE_VIRTADDR "' option\n",
> +				(unsigned long long)mem_sz, msl->base_va);

Do all OS's support this EAL option?

> +		else
> +			RTE_LOG(ERR, EAL, "Cannot reserve memory\n");
> +		return -1;
> +	}
> +	msl->base_va = addr;
> +	msl->len = mem_sz;
> +
> +	RTE_LOG(DEBUG, EAL, "VA reserved for memseg list at %p, size %zx\n",
> +			addr, mem_sz);
> +

<snip>

>   
> -#define MEMSEG_LIST_FMT "memseg-%" PRIu64 "k-%i-%i"
>   static int
> -alloc_memseg_list(struct rte_memseg_list *msl, uint64_t page_sz,
> +memseg_list_init(struct rte_memseg_list *msl, uint64_t page_sz,
>   		int n_segs, int socket_id, int type_msl_idx)
>   {
> -	char name[RTE_FBARRAY_NAME_LEN];
> -
> -	snprintf(name, sizeof(name), MEMSEG_LIST_FMT, page_sz >> 10, socket_id,
> -		 type_msl_idx);
> -	if (rte_fbarray_init(&msl->memseg_arr, name, n_segs,
> -			sizeof(struct rte_memseg))) {
> -		RTE_LOG(ERR, EAL, "Cannot allocate memseg list: %s\n",
> -			rte_strerror(rte_errno));
> -		return -1;
> -	}
> -
> -	msl->page_sz = page_sz;
> -	msl->socket_id = socket_id;
> -	msl->base_va = NULL;
> -	msl->heap = 1; /* mark it as a heap segment */
> -
> -	RTE_LOG(DEBUG, EAL, "Memseg list allocated: 0x%zxkB at socket %i\n",
> -			(size_t)page_sz >> 10, socket_id);
> -
> -	return 0;
> +	return eal_memseg_list_init(
> +		msl, page_sz, n_segs, socket_id, type_msl_idx, true);

Here and in similar places: I wonder if there's value of keeping 
memseg_list_init function instead of just calling eal_memseg_list_init() 
directly from where this is called?
Burakov, Anatoly May 28, 2020, 12:19 p.m. UTC | #4
On 25-May-20 1:37 AM, Dmitry Kozlyuk wrote:
> All supported OS create memory segment lists (MSL) and reserve VA space
> for them in a nearly identical way. Move common code into EAL private
> functions to reduce duplication.
> 
> Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> ---

<snip>

> +void
> +eal_memseg_list_populate(struct rte_memseg_list *msl, void *addr, int n_segs)
> +{
> +	uint64_t page_sz = msl->page_sz;
> +	int i;
> +
> +	for (i = 0; i < n_segs; i++) {
> +		struct rte_fbarray *arr = &msl->memseg_arr;
> +		struct rte_memseg *ms = rte_fbarray_get(arr, i);
> +
> +		if (rte_eal_iova_mode() == RTE_IOVA_VA)
> +			ms->iova = (uintptr_t)addr;
> +		else
> +			ms->iova = RTE_BAD_IOVA;
> +		ms->addr = addr;
> +		ms->hugepage_sz = page_sz;
> +		ms->socket_id = 0;
> +		ms->len = page_sz;
> +
> +		rte_fbarray_set_used(arr, i);
> +
> +		addr = RTE_PTR_ADD(addr, page_sz);

This breaks 32-bit build. I believe page_sz should be size_t, not uint64_t.
Dmitry Kozlyuk May 28, 2020, 2:41 p.m. UTC | #5
On Thu, 28 May 2020 12:46:49 +0100
"Burakov, Anatoly" <anatoly.burakov@intel.com> wrote:

> On 25-May-20 1:37 AM, Dmitry Kozlyuk wrote:
> > All supported OS create memory segment lists (MSL) and reserve VA space
> > for them in a nearly identical way. Move common code into EAL private
> > functions to reduce duplication.
> > 
> > Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> > ---  
> 
> <snip>
> 
> > +eal_memseg_list_alloc(struct rte_memseg_list *msl, int reserve_flags)
> > +{
> > +	uint64_t page_sz;
> > +	size_t mem_sz;
> > +	void *addr;
> > +
> > +	page_sz = msl->page_sz;
> > +	mem_sz = page_sz * msl->memseg_arr.len;
> > +
> > +	addr = eal_get_virtual_area(
> > +		msl->base_va, &mem_sz, page_sz, 0, reserve_flags);
> > +	if (addr == NULL) {
> > +		if (rte_errno == EADDRNOTAVAIL)
> > +			RTE_LOG(ERR, EAL, "Cannot reserve %llu bytes at [%p] - "
> > +				"please use '--" OPT_BASE_VIRTADDR "' option\n",
> > +				(unsigned long long)mem_sz, msl->base_va);  
> 
> Do all OS's support this EAL option?

Supported, yes; meaningful, not quite: for Windows, we start with address 0
(let the OS choose) and using the option can hardly help. Probably Linux and
FreeBSD EALs should print this hint. For Windows, we can leave the option,
but not print misleading hint.
Burakov, Anatoly May 29, 2020, 8:49 a.m. UTC | #6
On 28-May-20 3:41 PM, Dmitry Kozlyuk wrote:
> On Thu, 28 May 2020 12:46:49 +0100
> "Burakov, Anatoly" <anatoly.burakov@intel.com> wrote:
> 
>> On 25-May-20 1:37 AM, Dmitry Kozlyuk wrote:
>>> All supported OS create memory segment lists (MSL) and reserve VA space
>>> for them in a nearly identical way. Move common code into EAL private
>>> functions to reduce duplication.
>>>
>>> Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
>>> ---
>>
>> <snip>
>>
>>> +eal_memseg_list_alloc(struct rte_memseg_list *msl, int reserve_flags)
>>> +{
>>> +	uint64_t page_sz;
>>> +	size_t mem_sz;
>>> +	void *addr;
>>> +
>>> +	page_sz = msl->page_sz;
>>> +	mem_sz = page_sz * msl->memseg_arr.len;
>>> +
>>> +	addr = eal_get_virtual_area(
>>> +		msl->base_va, &mem_sz, page_sz, 0, reserve_flags);
>>> +	if (addr == NULL) {
>>> +		if (rte_errno == EADDRNOTAVAIL)
>>> +			RTE_LOG(ERR, EAL, "Cannot reserve %llu bytes at [%p] - "
>>> +				"please use '--" OPT_BASE_VIRTADDR "' option\n",
>>> +				(unsigned long long)mem_sz, msl->base_va);
>>
>> Do all OS's support this EAL option?
> 
> Supported, yes; meaningful, not quite: for Windows, we start with address 0
> (let the OS choose) and using the option can hardly help. Probably Linux and
> FreeBSD EALs should print this hint. For Windows, we can leave the option,
> but not print misleading hint.
> 

We keep rte_errno when exiting this function, do we not? How about we 
just check it in the caller? It's a bit of a hack, but will avoid 
OS-specific #ifdef-ery in the common code. Not sure if it's worth it 
though, over just having an #idef :) Up to you!

Patch
diff mbox series

diff --git a/lib/librte_eal/common/eal_common_memory.c b/lib/librte_eal/common/eal_common_memory.c
index c6243aca1..0ecadd817 100644
--- a/lib/librte_eal/common/eal_common_memory.c
+++ b/lib/librte_eal/common/eal_common_memory.c
@@ -24,6 +24,7 @@ 
 #include "eal_private.h"
 #include "eal_internal_cfg.h"
 #include "eal_memcfg.h"
+#include "eal_options.h"
 #include "malloc_heap.h"
 
 /*
@@ -181,6 +182,97 @@  eal_get_virtual_area(void *requested_addr, size_t *size,
 	return aligned_addr;
 }
 
+int
+eal_memseg_list_init_named(struct rte_memseg_list *msl, const char *name,
+		uint64_t page_sz, int n_segs, int socket_id, bool heap)
+{
+	if (rte_fbarray_init(&msl->memseg_arr, name, n_segs,
+			sizeof(struct rte_memseg))) {
+		RTE_LOG(ERR, EAL, "Cannot allocate memseg list: %s\n",
+			rte_strerror(rte_errno));
+		return -1;
+	}
+
+	msl->page_sz = page_sz;
+	msl->socket_id = socket_id;
+	msl->base_va = NULL;
+	msl->heap = heap;
+
+	RTE_LOG(DEBUG, EAL,
+		"Memseg list allocated at socket %i, page size 0x%zxkB\n",
+		socket_id, (size_t)page_sz >> 10);
+
+	return 0;
+}
+
+int
+eal_memseg_list_init(struct rte_memseg_list *msl, uint64_t page_sz,
+		int n_segs, int socket_id, int type_msl_idx, bool heap)
+{
+	char name[RTE_FBARRAY_NAME_LEN];
+
+	snprintf(name, sizeof(name), MEMSEG_LIST_FMT, page_sz >> 10, socket_id,
+		 type_msl_idx);
+
+	return eal_memseg_list_init_named(
+		msl, name, page_sz, n_segs, socket_id, heap);
+}
+
+int
+eal_memseg_list_alloc(struct rte_memseg_list *msl, int reserve_flags)
+{
+	uint64_t page_sz;
+	size_t mem_sz;
+	void *addr;
+
+	page_sz = msl->page_sz;
+	mem_sz = page_sz * msl->memseg_arr.len;
+
+	addr = eal_get_virtual_area(
+		msl->base_va, &mem_sz, page_sz, 0, reserve_flags);
+	if (addr == NULL) {
+		if (rte_errno == EADDRNOTAVAIL)
+			RTE_LOG(ERR, EAL, "Cannot reserve %llu bytes at [%p] - "
+				"please use '--" OPT_BASE_VIRTADDR "' option\n",
+				(unsigned long long)mem_sz, msl->base_va);
+		else
+			RTE_LOG(ERR, EAL, "Cannot reserve memory\n");
+		return -1;
+	}
+	msl->base_va = addr;
+	msl->len = mem_sz;
+
+	RTE_LOG(DEBUG, EAL, "VA reserved for memseg list at %p, size %zx\n",
+			addr, mem_sz);
+
+	return 0;
+}
+
+void
+eal_memseg_list_populate(struct rte_memseg_list *msl, void *addr, int n_segs)
+{
+	uint64_t page_sz = msl->page_sz;
+	int i;
+
+	for (i = 0; i < n_segs; i++) {
+		struct rte_fbarray *arr = &msl->memseg_arr;
+		struct rte_memseg *ms = rte_fbarray_get(arr, i);
+
+		if (rte_eal_iova_mode() == RTE_IOVA_VA)
+			ms->iova = (uintptr_t)addr;
+		else
+			ms->iova = RTE_BAD_IOVA;
+		ms->addr = addr;
+		ms->hugepage_sz = page_sz;
+		ms->socket_id = 0;
+		ms->len = page_sz;
+
+		rte_fbarray_set_used(arr, i);
+
+		addr = RTE_PTR_ADD(addr, page_sz);
+	}
+}
+
 static struct rte_memseg *
 virt2memseg(const void *addr, const struct rte_memseg_list *msl)
 {
diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h
index a93850c09..705a60e9c 100644
--- a/lib/librte_eal/common/eal_private.h
+++ b/lib/librte_eal/common/eal_private.h
@@ -254,6 +254,68 @@  void *
 eal_get_virtual_area(void *requested_addr, size_t *size,
 		size_t page_sz, int flags, int reserve_flags);
 
+/**
+ * Initialize a memory segment list and create its backing storage.
+ *
+ * @param msl
+ *  Memory segment list to be filled.
+ * @param name
+ *  Name for the backing storage.
+ * @param page_sz
+ *  Size of segment pages in the MSL.
+ * @param n_segs
+ *  Number of segments.
+ * @param socket_id
+ *  Socket ID. Must not be SOCKET_ID_ANY.
+ * @param heap
+ *  Mark MSL as pointing to a heap.
+ * @return
+ *  0 on success, (-1) on failure and rte_errno is set.
+ */
+int
+eal_memseg_list_init_named(struct rte_memseg_list *msl, const char *name,
+	uint64_t page_sz, int n_segs, int socket_id, bool heap);
+
+/**
+ * Initialize memory segment list and create its backing storage
+ * with a name corresponding to MSL parameters.
+ *
+ * @param type_msl_idx
+ *  Index of the MSL among other MSLs of the same socket and page size.
+ *
+ * @see eal_memseg_list_init_named for remaining parameters description.
+ */
+int
+eal_memseg_list_init(struct rte_memseg_list *msl, uint64_t page_sz,
+	int n_segs, int socket_id, int type_msl_idx, bool heap);
+
+/**
+ * Reserve VA space for a memory segment list
+ * previously initialized with eal_memseg_list_init().
+ *
+ * @param msl
+ *  Initialized memory segment list with page size defined.
+ * @param reserve_flags
+ *  Extra memory reservation flags. Can be 0 if unnecessary.
+ * @return
+ *  0 on success, (-1) on failure and rte_errno is set.
+ */
+int
+eal_memseg_list_alloc(struct rte_memseg_list *msl, int reserve_flags);
+
+/**
+ * Populate MSL, each segment is one page long.
+ *
+ * @param msl
+ *  Initialized memory segment list with page size defined.
+ * @param addr
+ *  Starting address of list segments.
+ * @param n_segs
+ *  Number of segments to populate.
+ */
+void
+eal_memseg_list_populate(struct rte_memseg_list *msl, void *addr, int n_segs);
+
 /**
  * Get cpu core_id.
  *
diff --git a/lib/librte_eal/freebsd/eal_memory.c b/lib/librte_eal/freebsd/eal_memory.c
index 5bc2da160..29c3ed5a9 100644
--- a/lib/librte_eal/freebsd/eal_memory.c
+++ b/lib/librte_eal/freebsd/eal_memory.c
@@ -66,53 +66,34 @@  rte_eal_hugepage_init(void)
 		struct rte_memseg_list *msl;
 		struct rte_fbarray *arr;
 		struct rte_memseg *ms;
-		uint64_t page_sz;
+		uint64_t mem_sz, page_sz;
 		int n_segs, cur_seg;
 
 		/* create a memseg list */
 		msl = &mcfg->memsegs[0];
 
+		mem_sz = internal_config.memory;
 		page_sz = RTE_PGSIZE_4K;
-		n_segs = internal_config.memory / page_sz;
+		n_segs = mem_sz / page_sz;
 
-		if (rte_fbarray_init(&msl->memseg_arr, "nohugemem", n_segs,
-				sizeof(struct rte_memseg))) {
-			RTE_LOG(ERR, EAL, "Cannot allocate memseg list\n");
+		if (eal_memseg_list_init_named(
+				msl, "nohugemem", page_sz, n_segs, 0, true)) {
 			return -1;
 		}
 
-		addr = mmap(NULL, internal_config.memory,
-				PROT_READ | PROT_WRITE,
+		addr = mmap(NULL, mem_sz, PROT_READ | PROT_WRITE,
 				MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 		if (addr == MAP_FAILED) {
 			RTE_LOG(ERR, EAL, "%s: mmap() failed: %s\n", __func__,
 					strerror(errno));
 			return -1;
 		}
-		msl->base_va = addr;
-		msl->page_sz = page_sz;
-		msl->len = internal_config.memory;
-		msl->socket_id = 0;
-		msl->heap = 1;
-
-		/* populate memsegs. each memseg is 1 page long */
-		for (cur_seg = 0; cur_seg < n_segs; cur_seg++) {
-			arr = &msl->memseg_arr;
 
-			ms = rte_fbarray_get(arr, cur_seg);
-			if (rte_eal_iova_mode() == RTE_IOVA_VA)
-				ms->iova = (uintptr_t)addr;
-			else
-				ms->iova = RTE_BAD_IOVA;
-			ms->addr = addr;
-			ms->hugepage_sz = page_sz;
-			ms->len = page_sz;
-			ms->socket_id = 0;
+		msl->base_va = addr;
+		msl->len = mem_sz;
 
-			rte_fbarray_set_used(arr, cur_seg);
+		eal_memseg_list_populate(msl, addr, n_segs);
 
-			addr = RTE_PTR_ADD(addr, page_sz);
-		}
 		return 0;
 	}
 
@@ -336,64 +317,25 @@  get_mem_amount(uint64_t page_sz, uint64_t max_mem)
 	return RTE_ALIGN(area_sz, page_sz);
 }
 
-#define MEMSEG_LIST_FMT "memseg-%" PRIu64 "k-%i-%i"
 static int
-alloc_memseg_list(struct rte_memseg_list *msl, uint64_t page_sz,
+memseg_list_init(struct rte_memseg_list *msl, uint64_t page_sz,
 		int n_segs, int socket_id, int type_msl_idx)
 {
-	char name[RTE_FBARRAY_NAME_LEN];
-
-	snprintf(name, sizeof(name), MEMSEG_LIST_FMT, page_sz >> 10, socket_id,
-		 type_msl_idx);
-	if (rte_fbarray_init(&msl->memseg_arr, name, n_segs,
-			sizeof(struct rte_memseg))) {
-		RTE_LOG(ERR, EAL, "Cannot allocate memseg list: %s\n",
-			rte_strerror(rte_errno));
-		return -1;
-	}
-
-	msl->page_sz = page_sz;
-	msl->socket_id = socket_id;
-	msl->base_va = NULL;
-
-	RTE_LOG(DEBUG, EAL, "Memseg list allocated: 0x%zxkB at socket %i\n",
-			(size_t)page_sz >> 10, socket_id);
-
-	return 0;
+	return eal_memseg_list_init(
+		msl, page_sz, n_segs, socket_id, type_msl_idx, false);
 }
 
 static int
-alloc_va_space(struct rte_memseg_list *msl)
+memseg_list_alloc(struct rte_memseg_list *msl)
 {
-	uint64_t page_sz;
-	size_t mem_sz;
-	void *addr;
 	int flags = 0;
 
 #ifdef RTE_ARCH_PPC_64
-	flags |= MAP_HUGETLB;
+	flags |= EAL_RESERVE_HUGEPAGES;
 #endif
-
-	page_sz = msl->page_sz;
-	mem_sz = page_sz * msl->memseg_arr.len;
-
-	addr = eal_get_virtual_area(msl->base_va, &mem_sz, page_sz, 0, flags);
-	if (addr == NULL) {
-		if (rte_errno == EADDRNOTAVAIL)
-			RTE_LOG(ERR, EAL, "Could not mmap %llu bytes at [%p] - "
-				"please use '--" OPT_BASE_VIRTADDR "' option\n",
-				(unsigned long long)mem_sz, msl->base_va);
-		else
-			RTE_LOG(ERR, EAL, "Cannot reserve memory\n");
-		return -1;
-	}
-	msl->base_va = addr;
-	msl->len = mem_sz;
-
-	return 0;
+	return eal_memseg_list_alloc(msl, flags);
 }
 
-
 static int
 memseg_primary_init(void)
 {
@@ -479,7 +421,7 @@  memseg_primary_init(void)
 					cur_max_mem);
 			n_segs = cur_mem / hugepage_sz;
 
-			if (alloc_memseg_list(msl, hugepage_sz, n_segs,
+			if (memseg_list_init(msl, hugepage_sz, n_segs,
 					0, type_msl_idx))
 				return -1;
 
@@ -487,7 +429,7 @@  memseg_primary_init(void)
 			total_type_mem = total_segs * hugepage_sz;
 			type_msl_idx++;
 
-			if (alloc_va_space(msl)) {
+			if (memseg_list_alloc(msl)) {
 				RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list\n");
 				return -1;
 			}
@@ -518,7 +460,7 @@  memseg_secondary_init(void)
 		}
 
 		/* preallocate VA space */
-		if (alloc_va_space(msl)) {
+		if (memseg_list_alloc(msl)) {
 			RTE_LOG(ERR, EAL, "Cannot preallocate VA space for hugepage memory\n");
 			return -1;
 		}
diff --git a/lib/librte_eal/linux/eal_memory.c b/lib/librte_eal/linux/eal_memory.c
index 7a9c97ff8..8b5fe613e 100644
--- a/lib/librte_eal/linux/eal_memory.c
+++ b/lib/librte_eal/linux/eal_memory.c
@@ -802,7 +802,7 @@  get_mem_amount(uint64_t page_sz, uint64_t max_mem)
 }
 
 static int
-free_memseg_list(struct rte_memseg_list *msl)
+memseg_list_free(struct rte_memseg_list *msl)
 {
 	if (rte_fbarray_destroy(&msl->memseg_arr)) {
 		RTE_LOG(ERR, EAL, "Cannot destroy memseg list\n");
@@ -812,58 +812,18 @@  free_memseg_list(struct rte_memseg_list *msl)
 	return 0;
 }
 
-#define MEMSEG_LIST_FMT "memseg-%" PRIu64 "k-%i-%i"
 static int
-alloc_memseg_list(struct rte_memseg_list *msl, uint64_t page_sz,
+memseg_list_init(struct rte_memseg_list *msl, uint64_t page_sz,
 		int n_segs, int socket_id, int type_msl_idx)
 {
-	char name[RTE_FBARRAY_NAME_LEN];
-
-	snprintf(name, sizeof(name), MEMSEG_LIST_FMT, page_sz >> 10, socket_id,
-		 type_msl_idx);
-	if (rte_fbarray_init(&msl->memseg_arr, name, n_segs,
-			sizeof(struct rte_memseg))) {
-		RTE_LOG(ERR, EAL, "Cannot allocate memseg list: %s\n",
-			rte_strerror(rte_errno));
-		return -1;
-	}
-
-	msl->page_sz = page_sz;
-	msl->socket_id = socket_id;
-	msl->base_va = NULL;
-	msl->heap = 1; /* mark it as a heap segment */
-
-	RTE_LOG(DEBUG, EAL, "Memseg list allocated: 0x%zxkB at socket %i\n",
-			(size_t)page_sz >> 10, socket_id);
-
-	return 0;
+	return eal_memseg_list_init(
+		msl, page_sz, n_segs, socket_id, type_msl_idx, true);
 }
 
 static int
-alloc_va_space(struct rte_memseg_list *msl)
+memseg_list_alloc(struct rte_memseg_list *msl)
 {
-	uint64_t page_sz;
-	size_t mem_sz;
-	void *addr;
-	int flags = 0;
-
-	page_sz = msl->page_sz;
-	mem_sz = page_sz * msl->memseg_arr.len;
-
-	addr = eal_get_virtual_area(msl->base_va, &mem_sz, page_sz, 0, flags);
-	if (addr == NULL) {
-		if (rte_errno == EADDRNOTAVAIL)
-			RTE_LOG(ERR, EAL, "Could not mmap %llu bytes at [%p] - "
-				"please use '--" OPT_BASE_VIRTADDR "' option\n",
-				(unsigned long long)mem_sz, msl->base_va);
-		else
-			RTE_LOG(ERR, EAL, "Cannot reserve memory\n");
-		return -1;
-	}
-	msl->base_va = addr;
-	msl->len = mem_sz;
-
-	return 0;
+	return eal_memseg_list_alloc(msl, 0);
 }
 
 /*
@@ -1009,12 +969,12 @@  prealloc_segments(struct hugepage_file *hugepages, int n_pages)
 			}
 
 			/* now, allocate fbarray itself */
-			if (alloc_memseg_list(msl, page_sz, n_segs, socket,
+			if (memseg_list_init(msl, page_sz, n_segs, socket,
 						msl_idx) < 0)
 				return -1;
 
 			/* finally, allocate VA space */
-			if (alloc_va_space(msl) < 0)
+			if (memseg_list_alloc(msl) < 0)
 				return -1;
 		}
 	}
@@ -1323,8 +1283,6 @@  eal_legacy_hugepage_init(void)
 	struct rte_mem_config *mcfg;
 	struct hugepage_file *hugepage = NULL, *tmp_hp = NULL;
 	struct hugepage_info used_hp[MAX_HUGEPAGE_SIZES];
-	struct rte_fbarray *arr;
-	struct rte_memseg *ms;
 
 	uint64_t memory[RTE_MAX_NUMA_NODES];
 
@@ -1343,7 +1301,7 @@  eal_legacy_hugepage_init(void)
 		void *prealloc_addr;
 		size_t mem_sz;
 		struct rte_memseg_list *msl;
-		int n_segs, cur_seg, fd, flags;
+		int n_segs, fd, flags;
 #ifdef MEMFD_SUPPORTED
 		int memfd;
 #endif
@@ -1358,12 +1316,12 @@  eal_legacy_hugepage_init(void)
 		/* create a memseg list */
 		msl = &mcfg->memsegs[0];
 
+		mem_sz = internal_config.memory;
 		page_sz = RTE_PGSIZE_4K;
-		n_segs = internal_config.memory / page_sz;
+		n_segs = mem_sz / page_sz;
 
-		if (rte_fbarray_init(&msl->memseg_arr, "nohugemem", n_segs,
-					sizeof(struct rte_memseg))) {
-			RTE_LOG(ERR, EAL, "Cannot allocate memseg list\n");
+		if (eal_memseg_list_init_named(
+				msl, "nohugemem", page_sz, n_segs, 0, true)) {
 			return -1;
 		}
 
@@ -1400,16 +1358,10 @@  eal_legacy_hugepage_init(void)
 		/* preallocate address space for the memory, so that it can be
 		 * fit into the DMA mask.
 		 */
-		mem_sz = internal_config.memory;
-		prealloc_addr = eal_get_virtual_area(
-				NULL, &mem_sz, page_sz, 0, 0);
-		if (prealloc_addr == NULL) {
-			RTE_LOG(ERR, EAL,
-					"%s: reserving memory area failed: "
-					"%s\n",
-					__func__, strerror(errno));
+		if (eal_memseg_list_alloc(msl, 0))
 			return -1;
-		}
+
+		prealloc_addr = msl->base_va;
 		addr = mmap(prealloc_addr, mem_sz, PROT_READ | PROT_WRITE,
 				flags | MAP_FIXED, fd, 0);
 		if (addr == MAP_FAILED || addr != prealloc_addr) {
@@ -1418,11 +1370,6 @@  eal_legacy_hugepage_init(void)
 			munmap(prealloc_addr, mem_sz);
 			return -1;
 		}
-		msl->base_va = addr;
-		msl->page_sz = page_sz;
-		msl->socket_id = 0;
-		msl->len = mem_sz;
-		msl->heap = 1;
 
 		/* we're in single-file segments mode, so only the segment list
 		 * fd needs to be set up.
@@ -1434,24 +1381,8 @@  eal_legacy_hugepage_init(void)
 			}
 		}
 
-		/* populate memsegs. each memseg is one page long */
-		for (cur_seg = 0; cur_seg < n_segs; cur_seg++) {
-			arr = &msl->memseg_arr;
+		eal_memseg_list_populate(msl, addr, n_segs);
 
-			ms = rte_fbarray_get(arr, cur_seg);
-			if (rte_eal_iova_mode() == RTE_IOVA_VA)
-				ms->iova = (uintptr_t)addr;
-			else
-				ms->iova = RTE_BAD_IOVA;
-			ms->addr = addr;
-			ms->hugepage_sz = page_sz;
-			ms->socket_id = 0;
-			ms->len = page_sz;
-
-			rte_fbarray_set_used(arr, cur_seg);
-
-			addr = RTE_PTR_ADD(addr, (size_t)page_sz);
-		}
 		if (mcfg->dma_maskbits &&
 		    rte_mem_check_dma_mask_thread_unsafe(mcfg->dma_maskbits)) {
 			RTE_LOG(ERR, EAL,
@@ -2191,7 +2122,7 @@  memseg_primary_init_32(void)
 						max_pagesz_mem);
 				n_segs = cur_mem / hugepage_sz;
 
-				if (alloc_memseg_list(msl, hugepage_sz, n_segs,
+				if (memseg_list_init(msl, hugepage_sz, n_segs,
 						socket_id, type_msl_idx)) {
 					/* failing to allocate a memseg list is
 					 * a serious error.
@@ -2200,13 +2131,13 @@  memseg_primary_init_32(void)
 					return -1;
 				}
 
-				if (alloc_va_space(msl)) {
+				if (memseg_list_alloc(msl)) {
 					/* if we couldn't allocate VA space, we
 					 * can try with smaller page sizes.
 					 */
 					RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list, retrying with different page size\n");
 					/* deallocate memseg list */
-					if (free_memseg_list(msl))
+					if (memseg_list_free(msl))
 						return -1;
 					break;
 				}
@@ -2395,11 +2326,11 @@  memseg_primary_init(void)
 			}
 			msl = &mcfg->memsegs[msl_idx++];
 
-			if (alloc_memseg_list(msl, pagesz, n_segs,
+			if (memseg_list_init(msl, pagesz, n_segs,
 					socket_id, cur_seglist))
 				goto out;
 
-			if (alloc_va_space(msl)) {
+			if (memseg_list_alloc(msl)) {
 				RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list\n");
 				goto out;
 			}
@@ -2433,7 +2364,7 @@  memseg_secondary_init(void)
 		}
 
 		/* preallocate VA space */
-		if (alloc_va_space(msl)) {
+		if (memseg_list_alloc(msl)) {
 			RTE_LOG(ERR, EAL, "Cannot preallocate VA space for hugepage memory\n");
 			return -1;
 		}