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author | https://me.yahoo.com/a/g3Ccalpj0NhN566pHbUl6i9QF0QEkrhlfPM-#b1c14 <diana@web> | 2015-02-16 20:08:03 +0100 |
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committer | GNU Hurd web pages engine <web-hurd@gnu.org> | 2015-02-16 20:08:03 +0100 |
commit | 95878586ec7611791f4001a4ee17abf943fae3c1 (patch) | |
tree | 847cf658ab3c3208a296202194b16a6550b243cf /open_issues/pfinet_vs_system_time_changes.mdwn | |
parent | 8063426bf7848411b0ef3626d57be8cb4826715e (diff) | |
download | web-95878586ec7611791f4001a4ee17abf943fae3c1.tar.gz web-95878586ec7611791f4001a4ee17abf943fae3c1.tar.bz2 web-95878586ec7611791f4001a4ee17abf943fae3c1.zip |
rename open_issues.mdwn to service_solahart_jakarta_selatan__082122541663.mdwn
Diffstat (limited to 'open_issues/pfinet_vs_system_time_changes.mdwn')
-rw-r--r-- | open_issues/pfinet_vs_system_time_changes.mdwn | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/open_issues/pfinet_vs_system_time_changes.mdwn b/open_issues/pfinet_vs_system_time_changes.mdwn deleted file mode 100644 index 09b00d30..00000000 --- a/open_issues/pfinet_vs_system_time_changes.mdwn +++ /dev/null @@ -1,101 +0,0 @@ -[[!meta copyright="Copyright © 2010, 2011, 2012 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]] - - -# IRC, unknown channel, unknown date - - <grey_gandalf> I did a sudo date... - <grey_gandalf> and the machine hangs - -This was very likely a misdiagnosis. - - -# IRC, freenode, #hurd, 2011-03-25 - - <tschwinge> antrik: I suspect it'S some timing stuff in pfinet that perhaps - uses absolute time, and somehow wildely gets confused? - <antrik> tschwinge: BTW, pfinet doesn't actually die I think -- it just - drops open connections... - <antrik> perhaps it thinks they timed out - <tschwinge> antrik: Isn't the translator restarted instead? - <antrik> don't think so - <antrik> when pfinet actually dies, I also loose the NFS mounts, which - doesn't happen in this case - <antrik> hehe "... and the machine hangs" - <antrik> he didn't bother to check that the machine is perfectly fine, only - the SSH connection got dropped - <tschwinge> Ah, I see. So it'S perhaps indeed simply closes TCP - connections that have been without data for ``too long''? - <antrik> yeah, that's my guess - <antrik> my clock is speeding, so ntpdate sets it in the past - <antrik> perhaps there is some math that concludes the connection have been - inactive for -200 seconds, which (unsigned) is more than any timeout :-) - <tschwinge> (The other way round, you might likely get some integer - wrap-around, and thus the same result.) - <tschwinge> Yes. - - -# IRC, freenode, #hurd, 2011-10-26 - - <antrik> anyways, when ntpdate adjusts to the past, the connections hang, - roughly for the amount of time being adjusted - <antrik> they do not die though - <antrik> (well, if it's long enough, they probably timeout on the other - side...) - - -# IRC, freenode, #hurd, 2011-10-27 - - <antrik> oh, another interesting thing I observed is that the the subhurd - pfinet did *not* drop the connection... only the main Hurd one. I thought - the clock is system-wide?... - <tschwinge> It is. - <antrik> it's really fascinating that only the pfinet on the Hurd instance - where I set the date is affected, and not the pfinet in the other - instance - - -# IRC, freenode, #hurd, 2012-06-28 - - <bddebian> great, now setting the date/time fucked my machine - <pinotree> yes, we lack a monotonic clock - <pinotree> there are select() loops that use gettimeofday to determine how - much time to wait - <pinotree> thus if the time changes (eg goes back), the calculation goes - crazy - <antrik> pinotree: didn't you implement a monotonic clock?... - <pinotree> started to - <antrik> bddebian: did it really fuck the machine? normally it only resets - TCP connections... - <pinotree> yeah, i remember such gettimeofay-based select-loops at least in - pfinet - <antrik> I don't think it's a loop. it just drops the connections, - believing they have timed out - <bddebian> antrik: Well in this case I don't know because I am at work but - it fucked me because I now cannot get to it.. :) - <antrik> bddebian: that's odd... you should be able to just log in again - IIRC - - -# IRC, freenode, #hurd, 2012-07-29 - - <antrik> pfinet can't cope with larger system time changes because it can't - use a monotonic clock - -[[clock_gettime]]. - - <braunr> well when librt becomes easily usable everywhere (it it's - possible), it will be quite easy to work around this issue - <pinotree> yes and no, you just need a monotonic clock and clock_gettime - able to use it - <braunr> why "no" ? |