[dpdk-stable] [PATCH] mem: mark pages as not accessed when returning back to memory pool
Burakov, Anatoly
anatoly.burakov at intel.com
Fri Apr 24 13:25:49 CEST 2020
On 24-Apr-20 11:42 AM, Li Feng wrote:
> 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");
>
Fixes: 8a4baf06c17a ("mem: mark pages as not accessed when reserving VA")
Cc: david.marchand at redhat.com
Cc: stable at dpdk.org
Acked-by: Anatoly Burakov <anatoly.burakov at intel.com>
--
Thanks,
Anatoly
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