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authorhttps://me.yahoo.com/a/g3Ccalpj0NhN566pHbUl6i9QF0QEkrhlfPM-#b1c14 <diana@web>2015-02-16 20:08:03 +0100
committerGNU Hurd web pages engine <web-hurd@gnu.org>2015-02-16 20:08:03 +0100
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-[[!meta copyright="Copyright © 2013 Free Software Foundation, Inc."]]
-
-[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
-id="license" text="Permission is granted to copy, distribute and/or modify this
-document under the terms of the GNU Free Documentation License, Version 1.2 or
-any later version published by the Free Software Foundation; with no Invariant
-Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
-is included in the section entitled [[GNU Free Documentation
-License|/fdl]]."]]"""]]
-
-[[!tag open_issue_hurd]]
-
-
-# [[!message-id "20130625154749.17799.36923@thinkbox.jade-hamburg.de"]]
-
-
-## IRC, freenode, #hurd, 2013-07-22
-
- <teythoon> ok, so back to the drawing board for the next big issue, the
- potential proc and init merge
- <teythoon> Roland had some harsh words for that proposal, but noone else
- raised concerns
- <youpi> noone else does not mean much
- <youpi> I guess only Roland actually understands the matter
- <youpi> so I'd tend to believe him
- <teythoon> even though, his criticism was so superficial, he could at least
- be a bit more specific...
- <braunr> i agree that the argument, being simply based on vague principle,
- isn't very convincing
- <teythoon> so, what should I do?
- <braunr> you can either keep them separate, or fight with roland
- <teythoon> common braunr, I need a little more guidance in these kind of
- social issues
- <teythoon> a statement like this is of little use ;)
- <braunr> that's the best i can give you
- <teythoon> :/
- <braunr> i have one patch "fixing" HZ on the hurd, and i even get to fight
- about it
- <teythoon> I understand Roland has been around forever and keeps an eye on
- stuff
- <teythoon> but could/would he block a patch for hurd if e.g. youpi would
- accept it
- <teythoon> i.e. how much control has he in practice?
- <teythoon> me fighting with him over a patch is of little value for anyone
- and I don't care to do so
- <braunr> not much i suppose now
- <braunr> but we also have to agree with the change
- <braunr> with *real* arguments
- <braunr> (well, if it was up to me, i'd even merge exec with proc so ..)
- <teythoon> ok, so I whip up a patch to see how it goes in practice and
- present it so we could talk about the issue with something to look at
- first
- <braunr> although maybe not ;p
- <braunr> you'll hit the same reaction
- <teythoon> from Roland?
- <braunr> yes
- <braunr> and youpi said he tends to trust what roland says
- <braunr> so let's discuss the pros and cons a bit more
- <teythoon> yes, but I'd honor his concerns if they were properly
- presented. just telling me to hack on linux instead even though I think I
- have demonstrated that I do want to work on Hurd is so childish in my
- eyes that I do not consider that a valid argument at the moment
- <teythoon> sure, shoot
- <braunr> well, functionally, they're unrelated
- <teythoon> head -n1 init/init.c
- <teythoon> /* Start and maintain hurd core servers and system run state
- <youpi> and thus it makes sense to make them separate, even if it does not
- seem to bring anything useful now
- <youpi> history has shown that it makes a bed for nice things later
- <braunr> teythoon: that's not what proc is about
- <teythoon> braunr: I know
- <teythoon> braunr: that's what init is about in its own words ;)
- <youpi> teythoon: also, "simplifying the code" is not necessarily an
- argument that would be considered
- <youpi> depending on the simplification
- <youpi> linux made it all simple by using a monolithic kernel :)
- <youpi> separating concerns is complex
- <youpi> but in the end it usually pays off on the Hurd
- <youpi> personally, I'd be fine with Guillem's solution, and renumbering
- init's pid in Debian
- <youpi> there's a pending question from Roland actually: what information
- is exchanged between init and proc in the end?
- <youpi> that's actually the point of the discussion: is that information
- really big or not
- <teythoon> I'm sorry, you lost me, where did he ask that question?
- <pinotree> $ git grep proc_getmsgport | egrep '[0-9]' ← /hurd/init as pid 1
- is hardcoded in few places
- <youpi> teythoon: he didn't ask it this way, but that's the question I had
- to be able to answer his
- <youpi> Date: Mon, 15 Jul 2013 10:36:35 -0700 (PDT)
- <youpi> > That's not what he said. He said there is a lot of information
- <youpi> > propagated from init to proc, and thus the separation is
- questionable.
- <youpi> Are you talking about bootstrap, or what?
- <youpi> as I haven't investigated much, I couldn't answer this
- <youpi> pinotree: right. We could patch these in Debian
- <teythoon> youpi: so, shall I refresh, test and refine Guillems patch and
- resend it?
- <youpi> it's probably an easier way
- <teythoon> ok, I start by doing that
-
-
-## IRC, freenode, #hurd, 2013-07-25
-
- <teythoon> pinotree: btw, there are two /sbin/init processes even with my
- hacked up init/proc variant where /sbin/init gets to be pid 1
- <pinotree> never seen that
- <pinotree> what are their parents?
- <teythoon> pinotree: well, pid 1 is /sbin/init now, pid 13 or something has
- the parent 1
- <teythoon> looks like init forks or something
- <pinotree> i guess your sysvinit is compiled without INITDEBUG?
- <pinotree> nothing in syslog either?
- <teythoon> pinotree: it's compiled like the sysvinit shipped with debian
- <pinotree> teythoon: do you have custom additions in inittab?
- <teythoon> pinotree: a terminal for my serial console
- <teythoon> *getty
- <pinotree> are the getty started correctly for you, btw?
- <teythoon> pinotree: yes
- <pinotree> interesting
- <pinotree> teythoon: back then, they were costantly respawning, with hurd's
- getty's failing to start when exec'ed by (sysv)init
- <pinotree> wonder what changed
- <teythoon> pinotree: cool, magically went away then :)
-
-
-## IRC, freenode, #hurd, 2013-07-29
-
- <teythoon> youpi: I need some feedback on the not freezing translators
- issue, more specifically whether I understood you correctly in your mail
- from wednesday (20130724131552.GG9576@type.bordeaux.inria.fr)
- <teythoon> oh yeah, and I had some questions yesterday too, about rpctrace
- and dead-name notifications, specifically why /hurd/init is not receiving
- any for the root translator and the exec server
- <braunr> teythoon: more details please
- <teythoon> ok, so /hurd/init is registering for dead name notifications for
- essential tasks
- <teythoon> the rootfs and exec both register as essential tasks at init and
- init requests successfully dead name notifications for them
- <teythoon> if you e.g. kill the auth server, /hurd/init will notice and
- crash the system
- <teythoon> if you kill exec or the rootfs, /hurd/init does not get notified
- <teythoon> I verified this with gdb and an subhurd
- <teythoon> I'm puzzled by this, as the kernel is the one who sends the
- notifications, right?
- <braunr> yes
- <braunr> teythoon: where is the problem ?
- <teythoon> and it is not that the system is not sending any messages, it
- is, I see the msgcount increase over time
- <teythoon> braunr: dunno, as far as I can tell the kernel does not deliver
- the notification for rootfs and exec
- <braunr> oh
- <teythoon> those are the two processes loaded by grub, maybe they are
- different somehow
- <braunr> is that affecting your work ?
- <teythoon> no, not directly, I strayed around at the weekend, trying to
- think of cool stuff hurd could do
- <teythoon> youpi: I need some feedback on the not freezing translators
- issue, more specifically whether I understood you correctly in your mail
- from wednesday (20130724131552.GG9576@type.bordeaux.inria.fr)
- <youpi> teythoon: ok, now I'm available for the not-freezing-translators
- thing :)
-
-
-## IRC, freenode, #hurd, 2013-08-05
-
- <teythoon> youpi: I'm in the process of producing a unified
- sysvinit-as-pid1 and please-dont-kill-important-processes patch series
- <teythoon> youpi: there is one issue with changing /hurd/inits pid, libcs
- reboot() also assumes that it has the pid 1
- <youpi> argl
- <youpi> that's bad, because it's then an ABI, not just an internal thing
- <teythoon> hardcoding the pid is the worst way of getting a handle of any
- server :/
- <teythoon> I've been thinking to make it explicit by binding it to
- /servers/startup or something
- <youpi> that would be more hurdish than using a pid, yes
- <teythoon> yes, and not only does it break the abi, but in a bad way
- too. if the libc is updated before the hurd, the shutdown sequence is
- broken in a way that the translators aren't synced :/
- <teythoon> youpi: as a workaround, we could make reboot() signal both pid 1
- and 2
- <youpi> at worse pid 1 shouldn't get harmed by receiving a startup_reboot
- RPC indeed
- <teythoon> yes
-
-
-## IRC, freenode, #hurd, 2013-08-16
-
- <teythoon> grml, the procfs hardcodes the kernels pid :/
- <teythoon> there's always one more thing to fix...
- <teythoon> uh, and we made pids.h a private header, so no nice constant for
- the procfs translator :/
- <teythoon> server lookup by hardcoding the pid should be banned...
-
-
-## IRC, freenode, #hurd, 2013-09-16
-
- <teythoon> youpi: I'm thinking about splitting /hurd/init into /hurd/init
- and /hurd/startup
- <teythoon> that way, you could also merge the init as pid1 patches
- <teythoon> that should be doable within the week
- <youpi> that would probably be better received by Roland than merging init
- into proc :)
- <teythoon> yes, I suppose so :D
- <youpi> perhaps you should start the discussion on the list about it
- already, with just a sketch of which would do what
- <teythoon> ok
- <teythoon> fwiw I like the name startup b/c it speaks the startup protocol
- <braunr> teythoon: +1 startup
-
-
-## IRC, freenode, #hurd, 2013-09-23
-
- <teythoon> I've been hacking on init/startup, I've looked into cleaning it
- up
-
-
-## IRC, freenode, #hurd, 2013-10-07
-
- <teythoon> braunr: btw, what do you think of my /hurd/startup proposal?
- <braunr> i haven't read it in detail yet
- <braunr> it's about separating init right ?
- <teythoon> yes