[dpdk-dev] [PATCH] eal: change max hugepage sizes to 4

Gagandeep Singh g.singh at nxp.com
Wed Aug 7 12:12:04 CEST 2019


DPDK currently is supporting maximum 3 hugepage,
sizes whereas system can support more than this e.g.
64K, 2M, 32M and 1G.

Having these four hugepage sizes available to use by DPDK,
which is valid in case of '--in-memory' EAL option or
using 4 separate mount points for each hugepage size;
hugepage_info_init() API reports an error.

This change increases the maximum supported mount points
to 4.

Signed-off-by: Gagandeep Singh <g.singh at nxp.com>
Signed-off-by: Nipun Gupta <nipun.gupta at nxp.com>
---

On ARM platform when the translation granule is 4KB,
there are 4 hugepage sizes supported.
On kernel 5.2, we can see below directories in
/sys/kernel/mm/hugepages:

hugepages-1048576kB
hugepages-2048kB
hugepages-32768kB
hugepages-64kB

 lib/librte_eal/common/eal_internal_cfg.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/common/eal_internal_cfg.h b/lib/librte_eal/common/eal_internal_cfg.h
index edff09d07..abb7ec913 100644
--- a/lib/librte_eal/common/eal_internal_cfg.h
+++ b/lib/librte_eal/common/eal_internal_cfg.h
@@ -15,7 +15,7 @@
 
 #include "eal_thread.h"
 
-#define MAX_HUGEPAGE_SIZES 3  /**< support up to 3 page sizes */
+#define MAX_HUGEPAGE_SIZES 4  /**< support up to 4 page sizes */
 
 /*
  * internal configuration structure for the number, size and
-- 
2.17.1



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