Linux 5.7 Will Let You Setup A Swap File Over A Network With SMB3/Samba
Written by Michael Larabel in Linux Storage on 12 April 2020 at 02:19 PM EDT. 31 Comments
LINUX STORAGE --
A last minute feature coming into the Linux 5.7 kernel on its last day of the merge window is experimental support for allowing a remote swap setup over a network using SMB3.

Certainly not a common use-case and one that poses security challenges as well as performance and reliability concerns, but Linux 5.7 will have experimental support for a swap file over the network via a SMB3 setup. There has been this capability already with a network block device among other possible setups for a remote swap file while now the SMB3/CIFS kernel code is allowing it as an experimental feature.

Swapping via a network SMB3 mount can be used for cases where there is no local block device but having booted via SMB3 or other remote/network boot technologies. There are also cases where a local block device may not be secure or other reasons for wanting a remote swap setup via SMB3.

This swap SMB3 capability was merged today ahead of the Linux 5.7-rc1 release expected in a few hours.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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