Hi Malahal Thanks for reply. I am not able to understand what this "INIT_WORK(&ms->kmirrord_work, do_mirror)" function does. It is written in mirror_ctr of dm-raid1. What i think is whenever a bio comes dm_mirror will be called if that is case then why this is written in mirror_ctr. Regards, Nishant. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel