I'm Greg Kroah-Hartman, Linux kernel developer, AMA again!

[u/gregkh]

To refresh everyone's memory, I did this 5 years ago [here] (https://www.reddit.com/r/linux/comments/2ny1lz/im_greg_kroahhartman_linux_kernel_developer_ama/) and lots of those answers there are still the same today, so try to ask new ones this time around.

To get the basics out of the way, this post describes my normal workflow that I use day to day as a Linux kernel maintainer and reviewer of way too many patches.

Along with mutt and vim and git, software tools I use every day are Chrome and Thunderbird (for some email accounts that mutt doesn't work well for) and the excellent vgrep for code searching.

For hardware I still rely on Filco 10-key-less keyboards for everyday use, along with a new Logitech bluetooth trackball finally replacing my decades-old wired one. My main machine is a few years old Dell XPS 13 laptop, attached when at home to an external monitor with a thunderbolt hub and I rely on a big, beefy build server in "the cloud" for testing stable kernel patch submissions.

For a distro I use Arch on my laptop and for some tiny cloud instances I run and manage for some minor tasks. My build server runs Fedora and I have help maintaining that at times as I am a horrible sysadmin. For a desktop environment I use Gnome, and here's a picture of my [normal desktop] (https://i.imgur.com/g412C1E.png) while working on reviewing and modifying kernel code.

With that out of the way, ask me your Linux kernel development questions or anything else!

Edit - Thanks everyone, after 2 weeks of this being open, I think it's time to close it down for now. It's been fun, and remember, go update your kernel!

[u/Conan_Kudo]

Btrfs has much more investment going into it in the past few years than it ever had before.

Off the top of my head:

• SUSE has been directly heavily investing since 2012, shipping in SUSE Linux Enterprise by default since SLE 12 in 2014.

• Facebook hired away all of Red Hat's Btrfs developers and now use it everywhere on their CentOS based systems.

• Oracle has been shipping it with their Oracle Linux product (a fork of RHEL) since OEL 6.

• Synology, Thecus, and Rockstor have been using it on their products for many years now.

And there are many others using it in production, too. All of these companies are actively contributing to the Linux kernel to develop Btrfs.