On 2/25/2017 21:26, houlinfei wrote: > hi Kinglong, Bruce, > Two suggestions all can resolve the problem,but when i use the way of mount --bind /root/hh/hh1 /root/hh/hh1 , and client has mount this nfs share. When i umount /root/hh/hh1.It will busy. when i umount share on client and stop nfsd on server. Then i can umount /root/hh/hh1. Why? Yes, that's a old problem. For each export entry, nfsd has some cache in kernel,each valid cache has a reference to the export directory. The umount operation finds that and report busy, after stop the service, all cache will be dropped(no any reference to export entry), umount success. I have try to fix the problem at 2015, http://www.spinics.net/lists/linux-nfs/msg52646.html Ps, if someone think it's really a requirement, I will pick it up? thanks, Kinglong Mee -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
