The 5.1 kernel has been released

[Posted May 6, 2019 by corbet]

Linus has released the 5.1 kernel, right on schedule. Some of the significant changes in the release include BPF spinlocks, more year-2038 preparation, the TEO CPU-idle governor, The io_uring fast asynchronous I/O mechanism, initial support for pidfds (file descriptors that refer to a process), the SafeSetID security module, and much more. See the KernelNewbies 5.1 page for lots of details.

The 5.1 kernel has been released

Posted May 6, 2019 5:51 UTC (Mon) by flussence (guest, #85566) [Link] (2 responses)

That device-mapper cmdline setup looks promising; I've long wanted something like that for Btrfs (no idea what the current situation is, but back when I tried it couldn't mount a multi-disk Btrfs on / without help from an initramfs).

The 5.1 kernel has been released

Posted May 6, 2019 6:24 UTC (Mon) by zdzichu (guest, #17118) [Link]

Btrfs driver in kernel need to know about all btrfs devices, in order to mount multi-device filesystem. Passing the information to the kernel is normally done by udev rules in initramfs.

If you want to do it manually, you can. You need to use rootflags= kernel command line parameter and put a series of device= keywords there, describing your multi-device btrfs setup. See https://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices#Registration_in_.2Fetc.2Ffstab for example.

The 5.1 kernel has been released

Posted May 6, 2019 8:52 UTC (Mon) by unixbhaskar (guest, #44758) [Link]

I do agree, the device-mapper kernel boot line looks exciting.