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mempool: fix non-IO flag inference

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When mempool had been created with RTE_MEMPOOL_F_NO_IOVA_CONTIG flag
but later populated with valid IOVA, RTE_MEMPOOL_F_NON_IO was unset,
while it should be kept. The unit test did not catch this
because rte_mempool_populate_default() it used was populating
with RTE_BAD_IOVA.

Keep setting RTE_MEMPOOL_NON_IO at an empty mempool creation
and add an assert for it in the unit test (remove the separate case).
Do not reset the flag if RTE_MEMPOOL_F_ON_IOVA_CONTIG is set.

Fixes: 11541c5c81 ("mempool: add non-IO flag")

Signed-off-by: Dmitry Kozlyuk <dkozlyuk@nvidia.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
This commit is contained in:
Dmitry Kozlyuk 2021-10-23 00:09:19 +03:00 committed by Thomas Monjalon
parent c28e2165ec
commit 6fda3ff6f0
2 changed files with 22 additions and 27 deletions
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45
app/test/test_mempool.c
View File

@ -740,16 +740,31 @@ test_mempool_events_safety(void)
static int
test_mempool_flag_non_io_set_when_no_iova_contig_set(void)
{
void *virt = NULL;
rte_iova_t iova;
size_t size = MEMPOOL_ELT_SIZE * 16;
struct rte_mempool *mp = NULL;
int ret;
virt = rte_malloc("test_mempool", size, rte_mem_page_size());
RTE_TEST_ASSERT_NOT_NULL(virt, "Cannot allocate memory");
iova = rte_mem_virt2iova(virt);
RTE_TEST_ASSERT_NOT_EQUAL(iova, RTE_BAD_IOVA, "Cannot get IOVA");
mp = rte_mempool_create_empty("empty", MEMPOOL_SIZE,
MEMPOOL_ELT_SIZE, 0, 0,
SOCKET_ID_ANY, RTE_MEMPOOL_F_NO_IOVA_CONTIG);
RTE_TEST_ASSERT_NOT_NULL(mp, "Cannot create mempool: %s",
rte_strerror(rte_errno));
rte_mempool_set_ops_byname(mp, rte_mbuf_best_mempool_ops(), NULL);
ret = rte_mempool_populate_default(mp);
RTE_TEST_ASSERT(mp->flags & RTE_MEMPOOL_F_NON_IO,
"NON_IO flag is not set on an empty mempool");
/*
* Always use valid IOVA so that populate() has no other reason
* to infer that the mempool cannot be used for IO.
*/
ret = rte_mempool_populate_iova(mp, virt, iova, size, NULL, NULL);
RTE_TEST_ASSERT(ret > 0, "Failed to populate mempool: %s",
rte_strerror(-ret));
RTE_TEST_ASSERT(mp->flags & RTE_MEMPOOL_F_NON_IO,
@ -757,6 +772,7 @@ test_mempool_flag_non_io_set_when_no_iova_contig_set(void)
ret = TEST_SUCCESS;
exit:
rte_mempool_free(mp);
rte_free(virt);
return ret;
}
@ -785,6 +801,9 @@ test_mempool_flag_non_io_unset_when_populated_with_valid_iova(void)
RTE_TEST_ASSERT_NOT_NULL(mp, "Cannot create mempool: %s",
rte_strerror(rte_errno));
RTE_TEST_ASSERT(mp->flags & RTE_MEMPOOL_F_NON_IO,
"NON_IO flag is not set on an empty mempool");
ret = rte_mempool_populate_iova(mp, RTE_PTR_ADD(virt, 1 * block_size),
RTE_BAD_IOVA, block_size, NULL, NULL);
RTE_TEST_ASSERT(ret > 0, "Failed to populate mempool: %s",
@ -812,28 +831,6 @@ test_mempool_flag_non_io_unset_when_populated_with_valid_iova(void)
return ret;
}
static int
test_mempool_flag_non_io_unset_by_default(void)
{
struct rte_mempool *mp;
int ret;
mp = rte_mempool_create_empty("empty", MEMPOOL_SIZE,
MEMPOOL_ELT_SIZE, 0, 0,
SOCKET_ID_ANY, 0);
RTE_TEST_ASSERT_NOT_NULL(mp, "Cannot create mempool: %s",
rte_strerror(rte_errno));
ret = rte_mempool_populate_default(mp);
RTE_TEST_ASSERT_EQUAL(ret, (int)mp->size, "Failed to populate mempool: %s",
rte_strerror(-ret));
RTE_TEST_ASSERT(!(mp->flags & RTE_MEMPOOL_F_NON_IO),
"NON_IO flag is set by default");
ret = TEST_SUCCESS;
exit:
rte_mempool_free(mp);
return ret;
}
#pragma pop_macro("RTE_TEST_TRACE_FAILURE")
static int
@ -1022,8 +1019,6 @@ test_mempool(void)
GOTO_ERR(ret, err);
/* test NON_IO flag inference */
if (test_mempool_flag_non_io_unset_by_default() < 0)
GOTO_ERR(ret, err);
if (test_mempool_flag_non_io_set_when_no_iova_contig_set() < 0)
GOTO_ERR(ret, err);
if (test_mempool_flag_non_io_unset_when_populated_with_valid_iova() < 0)

4
lib/mempool/rte_mempool.c
View File

@ -373,8 +373,8 @@ rte_mempool_populate_iova(struct rte_mempool *mp, char *vaddr,
STAILQ_INSERT_TAIL(&mp->mem_list, memhdr, next);
mp->nb_mem_chunks++;
/* At least some objects in the pool can now be used for IO. */
if (iova != RTE_BAD_IOVA)
/* Check if at least some objects in the pool are now usable for IO. */
if (!(mp->flags & RTE_MEMPOOL_F_NO_IOVA_CONTIG) && iova != RTE_BAD_IOVA)
mp->flags &= ~RTE_MEMPOOL_F_NON_IO;
/* Report the mempool as ready only when fully populated. */