Hi! On Thu, 19 Jul 2018 16:51:17 -0500 Ben Kohler wrote: > I'd like to propose adding USE=udev to our linux profiles (in > profiles/default/linux/make.defaults probably). This flag is already > enabled on desktop profiles but it also affects quite a few packages > used on non-desktop linux systems. > > This flag provides useful functionality that most linux users will want. > I'm a bit surprised that we still don't have it in all linux profiles, > but I think we've worked around this in the past by adding IUSE=+udev to > quite a few of those packages (33 packages, 116 ebuilds, by my count). > > This missing flag came to my attention again on bug 661584 where lvm2 > has IUSE=+udev but cryptsetup has only IUSE=udev, so non-desktop users > have a bit of a mismatch between the 2 and get ugly errors on cryptsetup. > > Since this flag only affects linux, I think it makes more sense to set > it in linux profiles than to use IUSE defaults. > > Any objections to this idea?
A user had contacted me with his input from the HPC world, I'm redirecting his e-mail here. James is whitelisted now so he can further participate in this discussion himself if necessary. As an HPC user of Gentoo I agree that minimal and highly optimized Gentoo setups are indeed very useful and must stay that way. Begin forwarded message: Date: Wed, 25 Jul 2018 13:31:59 -0400 From: james <gar...@verizon.net> To: birc...@gentoo.org Subject: udev's future Hello Andrew, Sorry, I do not have direct posting ability to gentoo-dev, so in hopes of finding a dev-sponsor, I hope you will paraphrase this email to you for the sake of preventing 'dev as a default' or base setting of any sort. My research and testing for new HPC configurations, has systemd and udev at the heart of codes to avoid to optimize the heterogeneous nature of the clusters I'm building. In fact my development work, although delayed due to transient-illness, is more of a gentoo-centric convergence of embedded-gentoo, minimal (server) gentoo, gentoo-hpc clusters and unikernels. As far as performance and security are concerned 'less' is always better. Those codes and ebuild that are desired are to added in a higher level; hoping to continue the leverage the portage tree of applications, only as dynamically required. Avoidance of setting udev or in any form mandating any part of systemd will have dire consequences and cost me months, if not years to find a way to 'totally undo' the ravages of udev. Minimized kernels are also fundamental to my loosely-coupled (gentoo) HPC development. Even tiny Rtos based embedded linux systems are in the process of being included in a loosely-coupled gentoo centric heterogeneous HPC cluster. I would 'beg' against making udev primary under any circumstance. Gentoo has a unique and powerful position, just for it's position of choice and minimizational features; After 15 years, I'd hate to have to work in another distro, as gentoo has served me extraordinarily well over the decades. sincerely, James Horton, PE Best regards, Andrew Savchenko
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