> -----Original Message-----
> From: Fiona Trahe <fiona.tr...@intel.com>
> Sent: Thursday, July 25, 2019 10:34 PM
> To: dev@dpdk.org
> Cc: akhil.go...@nxp.com; fiona.tr...@intel.com; Shally Verma
> <shal...@marvell.com>
> Subject: [EXT] [PATCH] compressdev: clarify destination buffer size for
> corner case
>
> External Email
>
> ----------------------------------------------------------------------
> Clarify the corner case with incompressible data whereby the output can
> actually be greater than the uncompressed data.
>
> Signed-off-by: Fiona Trahe <fiona.tr...@intel.com>
> ---
> lib/librte_compressdev/rte_comp.h | 6 ++++++
> 1 files changed, 6 insertions(+), 0 deletions(-)
>
> diff --git a/lib/librte_compressdev/rte_comp.h
> b/lib/librte_compressdev/rte_comp.h
> index b7474c4..95306c5 100644
> --- a/lib/librte_compressdev/rte_comp.h
> +++ b/lib/librte_compressdev/rte_comp.h
> @@ -323,6 +323,12 @@ struct rte_comp_op {
> * If the output data is expected to be bigger than this a chain of
> * mbufs can be passed to the PMD if the PMD's capabilities indicate
> * it supports this.
> + *
> + * @note, if incompressible data is passed to an engine for
> compression
> + * using RTE_COMP_ALGO_DEFLATE, it's possible for the output data
> + * to be larger than the uncompressed data, due to the inclusion
> + * of the DEFLATE header blocks. The size of m_dst should
> accommodate
> + * this, else OUT_OF_SPACE errors can be expected in this case.
> */
>
> struct {
> --
> 1.7.0.7
Acked-by: Shally Verma <shal...@marvell.com>
