Speedup dm-crypt
and Disable Workqueues

$ cryptsetup --perf-no_read_workqueue \
     --perf-no_write_workqueue \
     open /dev/disk name

> no-read-workqueue
> no-write-workqueue

In the Linux kernel🐧, the cryptographic subsystem was designed with asynchronous cryptographic hardware in mind. These days, most CPUs offer powerful instructions to implement cryptographic algorithms at the CPU level. 💻🔐 Additionally, storage devices are becoming faster and faster. Therefore, we suggest configuring Linux disk encryption, dm-crypt, into synchronous mode to avoid too much scheduling overhead if you’re not using offloading chips. 🚀🖥️