VirtualBox SF Driver Ejected From The Linux 5.4 Kernel
Written by Michael Larabel in Virtualization on 13 November 2019 at 12:06 AM EST. 15 Comments
VIRTUALIZATION --
Merged to the mainline Linux kernel last week was a driver providing VirtualBox guest shared folder support with the driver up to now being out-of-tree but important for sharing files between the host and guest VM(s). While the driver was part of Linux 5.4-rc7, Linus Torvalds decided to delete this driver on Tuesday.

The VirtualBox Shared Folder (VBOXSF) driver will not be part of the mainline Linux 5.4 kernel. Linus was unhappy that it didn't have the necessary sign-offs plus that it's coming late in the cycle and not appearing to meet quality expectations.

In deleting the VirtualBox shared folder driver he noted:
This went into staging in rc7. It turns out that was a mistake, and apparently it wasn't even supposed to go there at all, but be introduced as a regular filesystem.

We don't try to sneak in whole new filesystems this late in the rc, just delete the whole thing, and it can be re-introduced as a proper patch with proper acks from actual filesystem people instead of some odd late-rc staging back-door.

The Linux 5.5 merge window is opening in the next week or two (depending upon how the rest of the 5.4 cycle plays out) so will likely try to be reintroduced for that next kernel cycle.
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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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