-----Original Message-----
> Date: Thu, 23 Aug 2018 17:59:55 +0100
> From: Anatoly Burakov <anatoly.bura...@intel.com>
> To: dev@dpdk.org
> CC: tiwei....@intel.com, ray.kinse...@intel.com, zhihong.w...@intel.com,
> maxime.coque...@redhat.com, kuralamudhan.ramakrish...@intel.com
> Subject: [dpdk-dev] [PATCH 8/8] mem: support using memfd segments for
> in-memory mode
> X-Mailer: git-send-email 1.7.0.7
>
>
> Enable using memfd-created segments if supported by the system.
>
> This will allow having real fd's for pages but without hugetlbfs
> mounts, which will enable in-memory mode to be used with virtio.
>
> The implementation is mostly piggy-backing on existing real-fd
> code, except that we no longer need to unlink any files or track
> per-page locks in single-file segments mode, because in-memory
> mode does not support secondary processes anyway.
>
> We move some checks from EAL command-line parsing code to memalloc
> because it is now possible to use single-file segments mode with
> in-memory mode, but only if memfd is supported.
>
> Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
> ---
> lib/librte_eal/common/eal_common_options.c | 6 +-
> lib/librte_eal/linuxapp/eal/eal_memalloc.c | 265 ++++++++++++++++++---
> 2 files changed, 235 insertions(+), 36 deletions(-)
>
>
> +static inline uint32_t
> +bsf64(uint64_t v)
> +{
> + return (uint32_t)__builtin_ctzll(v);
> +}
> +
> +static inline uint32_t
> +log2_u64(uint64_t v)
> +{
> + if (v == 0)
> + return 0;
> + v = rte_align64pow2(v);
> + return bsf64(v);
> +}
> +
Can we move this to lib/librte_eal/common/include/rte_common.h?
It has already rte_log2_u32()
