[dpdk-stable] [PATCH] mem: mark pages as not accessed when returning back to memory pool

[Li Feng]

Commit 8a4baf06c17a ("mem: mark pages as not accessed when reserving VA")
has mapped the initialized memory with PROT_NONE, and when it's unmapped,
eal_memalloc.c should remmap the anonymous memory with PROT_NONE too.

Signed-off-by: Li Feng <fengli at smartx.com>
---
 lib/librte_eal/linux/eal_memalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/linux/eal_memalloc.c b/lib/librte_eal/linux/eal_memalloc.c
index 9d2a6fc6f..64a2b44c1 100644
--- a/lib/librte_eal/linux/eal_memalloc.c
+++ b/lib/librte_eal/linux/eal_memalloc.c
@@ -683,7 +683,7 @@ free_seg(struct rte_memseg *ms, struct hugepage_info *hi,
 	/* erase page data */
 	memset(ms->addr, 0, ms->len);
 
-	if (mmap(ms->addr, ms->len, PROT_READ,
+	if (mmap(ms->addr, ms->len, PROT_NONE,
 			MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0) ==
 				MAP_FAILED) {
 		RTE_LOG(DEBUG, EAL, "couldn't unmap page\n");
-- 
2.11.0


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