Date: Mon, 28 Apr 2008 10:33:23 +0200 (CEST) From: "Peter Holm" <peter@holm.cc> To: d@delphij.net Cc: freebsd-fs@freebsd.org, Jeff Roberson <jeff@freebsd.org>, d@delphij.net, kib@freebsd.org Subject: Re: [7.0-R] Possible ufs livelock during coredump path? Message-ID: <35682.193.234.247.50.1209371603.squirrel@webmail3.pair.com> In-Reply-To: <481580CB.1000800@delphij.net> References: <4815620F.3090005@delphij.net> <64011.193.234.247.50.1209366028.squirrel@webmail3.pair.com> <481580CB.1000800@delphij.net>
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> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Peter Holm wrote: > | Hi, > | > | It seems that we have a potential livelock during coredump on 7.0-R, the > | case was that two processes trying to coredump in the same time (e.g. if > | I configure kern.corefile=/var/tmp/%N.core and a lot of instances > | coredump in the same time), perhaps when paging involved with it. Upon > | reboot, it would not recover but wait infinitely. The box is running > | 7.0-R/i386, UP (Origin = "GenuineIntel" Id = 0xf34 Stepping = 4). > | > | Is this an known issue? This is my own server but I do not have my > | hands on it because it is in China, however I can provide some help if > | the experiment can be recovered with a power-cycle :) > | > | > |> AFAIK it is an old problem. I have some test where I had to disable > core > |> dumps for the same reason. I seem to remember that the problem is > related > |> to running out of VM? > > For my case it does not seem to be ran out of VM (at least the system > did not printed out any messages, the log has a lot of kernel: pid 27223 > (httpd), uid 80: exited on signal 11 (core dumped) but not the out of > swap one. > Nor did I, as I remember. > So, presumably we can reliably trigger this situation (or at least your > ones :)? > It's a long time since I looked at this problem, but this would seem to be a good excuse to look at it again. - Peter > Cheers, > - -- > Xin LI <delphij@delphij.net> http://www.delphij.net/ > FreeBSD - The Power to Serve! > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.9 (FreeBSD) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iEYEARECAAYFAkgVgMsACgkQi+vbBBjt66BnOwCeJLB5xoE27b3CN/x/VIL+0EAI > +c8AoJyYiqCi7tBeqZBx6cj/+gzBLmFn > =qZmb > -----END PGP SIGNATURE----- >
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