Hi, We are using dm-crypt driver to encrypt Android Phone on a 2 core target. We saw random failures (kernel panics) in scatterwalk code when we were trying to bring secondary cpu online and offline randomly. I looked into the dm-crypt driver(drivers/md/dm-crypt.c) and put a hack in the kcryptd_queue_crypt function to acquire hotplug lock (using get_online_cpus()), just before adding new work in work queue and release this lock (using put_online_cpus) after completing work in kcryptd_crypt function. With this i didn't see any issue during encryption. So my questions are - 1) Is it a know problem that there is some issue with dm-crypt driver with cpu hotplug? 2) If yes, then can someone suggest me a cleaner way to resolve this issue? Thanks in advance! --Shashank Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
