[RFC PATCH 2/2] lib/librte_eal: Remove unnecessary hugepage zero-filling
From: Zhihong Wang <hidden>
Date: 2015-11-18 10:29:46
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
The kernel fills new allocated (huge) pages with zeros. DPDK just has to touch the pages to trigger the allocation. Signed-off-by: Zhihong Wang <redacted> --- lib/librte_eal/linuxapp/eal/eal_memory.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 0de75cd..af823dc 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c@@ -410,7 +410,7 @@ map_all_hugepages(struct hugepage_file *hugepg_tbl, if (orig) { hugepg_tbl[i].orig_va = virtaddr; - memset(virtaddr, 0, hugepage_sz); + memset(virtaddr, 0, 8); } else { hugepg_tbl[i].final_va = virtaddr;
@@ -592,9 +592,6 @@ remap_all_hugepages(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi) } } - /* zero out the whole segment */ - memset(hugepg_tbl[page_idx].final_va, 0, total_size); - page_idx++; }
--
2.5.0