[PATCH] mbuf: optimize detach direct buffer

[Bruce Richardson]

On Sat, Jan 03, 2026 at 05:40:54PM +0000, Morten Brørup wrote:
> When rte_pktmbuf_prefree_seg() resets an mbuf about to be freed, it
> doesn't write the fields that already have the required values. This
> saves a memory store operation when all the fields already have the
> required values.
> 
> This patch adds the same optimization to __rte_pktmbuf_free_direct(),
> to improve the performance for freeing a direct buffer being detached from
> a packet mbuf, i.e. saving a memory store operation when all the fields
> (of the buffer being freed) already have the required values.
> 
> Signed-off-by: Morten Brørup <mb at smartsharesystems.com>
> ---
>  lib/mbuf/rte_mbuf.h | 16 +++++++++++-----
>  1 file changed, 11 insertions(+), 5 deletions(-)
> 
Acked-by: Bruce Richardson <bruce.richardson at intel.com>