[dpdk-dev] About the shared flock for hugepage files

白长敏 912873551 at qq.com
Tue Sep 12 04:16:39 CEST 2017

Hi, everyone,

    I'm a developer from china, now i have a problem is about the shared flock for hugepage files in the function of "map_all_hugepages()".

as follows:
/* set shared flock on the file. */

if (flock(fd, LOCK_SH | LOCK_NB) == -1) {

        RTE_LOG(DEBUG, EAL, "%s(): Locking file failed:%s \n", __func__, strerror(errno));


        return i;



there, it gives a shared flock to each hugepage file in /mnt/huge, and close it right away. 

it makes me puzzled. Why? What doing that is for? 

I'm looking forward to your reply, thank you very much.

best regards,

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