Re: [dpdk-dev] [PATCH v7 1/1] fbarray: fix duplicated fbarray file in secondary

["Burakov, Anatoly" <anatoly.burakov@intel.com>]

On 13-Nov-19 9:43 PM, yasufum.o@gmail.com wrote:
> From: Yasufumi Ogawa <ogawa.yasufumi@lab.ntt.co.jp>
> 
> In secondary_msl_create_walk(), it creates a file for fbarrays with its
> PID for reserving unique name among secondary processes. However, it
> does not work if several secondaries run as app containers because each
> of containerized secondary has PID 1, and failed to reserve unique name
> other than first one. To reserve unique name in each of containers, use
> hostname in addition to PID.
> 
> Cc: stable@dpdk.org
> 
> Signed-off-by: Yasufumi Ogawa <yasufum.o@gmail.com>
> ---
>   lib/librte_eal/linux/eal/eal_memalloc.c | 16 +++++++++++++---
>   1 file changed, 13 insertions(+), 3 deletions(-)
> 
> diff --git a/lib/librte_eal/linux/eal/eal_memalloc.c b/lib/librte_eal/linux/eal/eal_memalloc.c
> index af6d0d023..11de6d4d6 100644
> --- a/lib/librte_eal/linux/eal/eal_memalloc.c
> +++ b/lib/librte_eal/linux/eal/eal_memalloc.c
> @@ -1365,6 +1365,12 @@ secondary_msl_create_walk(const struct rte_memseg_list *msl,
>   	struct rte_memseg_list *primary_msl, *local_msl;
>   	char name[PATH_MAX];
>   	int msl_idx, ret;
> +	char hostname[HOST_NAME_MAX+1] = { 0 };
> +	/* filename of secondary's fbarray is defined such as
> +	 * "fbarray_memseg-1048576k-0-0_PID_HOSTNAME" and length of PID
> +	 * can be 7 digits maximumly.
> +	 */
> +	int fbarray_sec_name_len = 32 + 7 + 1 + HOST_NAME_MAX + 1;

What does 32 stand for? Maybe #define both 32 and 7 values?

Other than that,

Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>

-- 
Thanks,
Anatoly