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Home > Linux > Linux is now rebooting faster on NVMe drives

Linux is now rebooting faster on NVMe drives

The Linux kernel has received a new patch changing the NVMe shut down queue process; making the operating system reboot faster.


Rusen Gobel Rusen Gobel
March 31, 2022
1 min read
Linux is now rebooting faster on NVMe drives

An interesting procedure change has been made in the Linux kernel regarding NVMe drives’ shut down process. The new Linux Kernel patch has changed the queueing process for the systems that have multiple NVMe drives in them, which should, as a result, vastly improve the reboot times.

Waiting for shutdown…

The Linux kernel will no longer wait for an NVMe drive to shut down to go for the next one

According to the patch notes, the old procedure for shutting down NVMe drives was synchronous; it creates a shutdown queue for all of the drives. A single NVMe drive’s shutdown takes about 4.5 seconds and servers might have way more than that. Shutting them one by one takes approximately 72 seconds, which means a lot of time for uptime-critical systems, such as servers.

The new patch changes the old procedure with an asynchronous one; which means as soon as the shutdown order is given to the target NVMe drive, the system goes for the other one without waiting for its shutting down process. This change is made at the PCIe bus level and modifies the core driver and it is backward compatible.

Theoradicly this patch would reduce the 72 seconds shutting down period to approximately 5 seconds for the NVMe drives in our example of the 16-drive system. However, the results might change in real-world applications.

It sounds like a pretty nice performance uplift for no cost.

Related: How to update Linux Kernel without reboot

See more Linux News


Tags: Linux Kernel
Rusen Gobel

Rusen Gobel

Rusen Gobel is a news editor at Cloud7 News. With more than 10 years of experience, Rusen worked as a hardware and software news editor for technology sites such as Shiftdelete, Teknokolis, Hardware Plus, BT Haber. In addition, Rusen publishes consumer product reviews on his YouTube channel. While consumer electronics has been his main focus for years, now Rusen is more interested in WordPress and software development. He had contributed different web application projects in his professional career. Rusen had graduated from Istanbul University, department of Computer Engineering. Rusen has a very high passion for learning and writing for every kind of technology. That's why he has been working as a tech editor for more than ten years on several different technology magazines and online news portals.

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