[dpdk-dev] [PATCH] eal: warn on --no-huge allocation requirement

[Thomas Monjalon]

When using --no-huge mode, dynamic allocation is not supported.
Because of this limitation, the option --legacy-mem is implied
and -m may be needed to specify the amount of memory to allocate.
Otherwise the default amount MEMSIZE_IF_NO_HUGE_PAGE will be allocated.

Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
---
 lib/librte_eal/common/eal_common_options.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index 512d5088e..4a76929ea 100644
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -1551,6 +1551,10 @@ eal_check_common_options(struct internal_config *internal_cfg)
 			"be specified at the same time\n");
 		return -1;
 	}
+	if (internal_cfg->no_hugetlbfs && internal_cfg->memory == 0) {
+		RTE_LOG(NOTICE, EAL, "Option --"OPT_NO_HUGE" uses legacy mode, "
+			"option -m would override default memory allocation\n");
+	}
 	if (internal_cfg->no_hugetlbfs && internal_cfg->force_sockets == 1) {
 		RTE_LOG(ERR, EAL, "Option --"OPT_SOCKET_MEM" cannot "
 			"be specified together with --"OPT_NO_HUGE"\n");
-- 
2.21.0