Wednesday, March 29th, 2017

Time	Event
1:24p	[$] The next steps for userfaultfd() The userfaultfd() system call allows user space to intervene in the handling of page faults. As Andrea Arcangeli and Mike Rapaport described in a 2017 Linux Storage, Filesystem, and Memory-Management Summit session dedicated to the subject, userfaultfd() was originally created to help with the live migration of virtual machines between physical hosts. It allows pages to be copied to the new host on demand, after the machine itself has been moved, leading to faster, more predictable migrations. Work on userfaultfd() is not finished, though; there are a number of other features that developers would like to add. (Comment on this)
1:38p	GCC for new contributors David Malcolm has put together the beginnings of an unofficial guide to GCC for developers who are getting started with the compiler. "I’m a relative newcomer to GCC, so I thought it was worth documenting some of the hurdles I ran into when I started working on GCC, to try to make it easier for others to start hacking on GCC. Hence this guide." (Comment on this)
3:10p	Security updates for Wednesday Security updates have been issued by CentOS (icoutils and openjpeg), Debian (eject, graphicsmagick, libytnef, and tnef), Fedora (drupal8, firefox, kernel, ntp, qbittorrent, texlive, and webkitgtk4), Oracle (bash, coreutils, glibc, gnutls, kernel, libguestfs, ocaml, openssh, qemu-kvm, quagga, samba, samba4, tigervnc, and wireshark), Red Hat (curl), Slackware (mariadb), SUSE (samba), and Ubuntu (apparmor). (Comment on this)
3:21p	[$] Memory-management patch review Memory-management (MM) patches are notoriously difficult to get merged into the mainline kernel. They are subjected to a high degree of review because this is an area where it is easy to get things wrong. Or, at least, that is how it used to be. The final memory-management session at the 2017 Linux Storage, Filesystem, and Memory-Management Summit was concerned with patch review in the MM subsystem — or the lack of it. (Comment on this)
5:24p	[$] Overlayfs features The overlayfs filesystem is being used more and more these days, especially in conjunction with containers. Amir Goldstein and Miklos Szeredi led a discussion about recent and upcoming features for the filesystem at LSFMM 2017. (Comment on this)

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