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