Sorry, sent the previous email too quickly.



> -----Original Message-----
> From: Marat Khalili
> Sent: Thursday 31 July 2025 11:52
> To: '苏赛' <susai.ss@bytedance.com>; jasvinder.singh@intel.com
> Cc: dev@dpdk.org
> Subject: RE: [PATCH] net/cksum: compute raw cksum for several segments

> > +static inline uint16_t
> > +__rte_raw_cksum_reduce_u64(uint64_t sum)
> > +{
> > +        uint32_t tmp;
> > +
> > +        tmp = __rte_raw_cksum_reduce((uint32_t)sum);
> > +        tmp += __rte_raw_cksum_reduce((uint32_t)(sum >> 32));
>
> What if this addition overflows?

Realized it cannot actually overflow, my bad (maybe still needs a comment). Now this function looks good to me as well.

> > +        return __rte_raw_cksum_reduce(tmp);
> > +}