From: Georgina Sheehan <georgina.sheehan@intel.com>
Date: Thu, 12 Oct 2017 11:13:59 +0000 (+0100)
Subject: plugins/dpdk: align memory to avoid potential segfault and false sharing
X-Git-Tag: v17.10~11
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=abc914b7da7ec7da9c6e5f4738b14d984a2edcb1;p=vpp.git

plugins/dpdk: align memory to avoid potential segfault and false sharing

VPP-1025

Change-Id: I87bb8f38974a7be274c1b1d205f5513e7d068e48
Signed-off-by: Georgina <georgina.sheehan@intel.com>
---

diff --git a/src/plugins/dpdk/buffer.c b/src/plugins/dpdk/buffer.c
index e09d80194ed..02a11b83891 100644
--- a/src/plugins/dpdk/buffer.c
+++ b/src/plugins/dpdk/buffer.c
@@ -188,7 +188,7 @@ fill_free_list (vlib_main_t * vm,
   /* Always allocate new buffers in reasonably large sized chunks. */
   n = clib_max (n, fl->min_n_buffers_each_physmem_alloc);
 
-  vec_validate (vm->mbuf_alloc_list, n - 1);
+  vec_validate_aligned (vm->mbuf_alloc_list, n - 1, CLIB_CACHE_LINE_BYTES);
 
   if (rte_mempool_get_bulk (rmp, vm->mbuf_alloc_list, n) < 0)
     return 0;