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Date:      Thu, 6 Jan 2011 14:26:32 +0200
From:      Kostik Belousov <kostikbel@gmail.com>
To:        Lev Serebryakov <lev@freebsd.org>
Cc:        "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org>
Subject:   Re: FreeBSD 8.2-PRERELEASE hangs under load with "live" kernel
Message-ID:  <20110106122632.GO12599@deviant.kiev.zoral.com.ua>
In-Reply-To: <1608571029.20110106133145@serebryakov.spb.ru>
References:  <1608571029.20110106133145@serebryakov.spb.ru>

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On Thu, Jan 06, 2011 at 01:31:45PM +0300, Lev Serebryakov wrote:
> Hello, Freebsd-stable.
>=20
>  I've  added  torrent  client  (transmission)  to  software on my home
>  server  and it starts to hang in very unusual way: kernel works but
>  userland doesn't.
>=20
>    I can ping it (and it answers). I can scroll console with
>  "scrolllock" button and keys. I can break into debugger with
>  Ctrl+SysReq and it shows, that one CPU is occupied by idle process and
>  other by "Giant tasq", but no userland processes answer: I can not
>  ssh to it, I cannot login on console, samba is dead, etc.
>=20
>    "ps" in kernel debugger shows, that many of processes in "pfault"
>  state, and noting more "special".
>=20
>    memtest86+ doesn't show any errors after 8 passes of tests (about
>  10 hours), so RAM looks Ok.
>=20
>    What should I do in kdb to understand what happens?
>=20
>    Kernel config and /var/run/dmesg.boot is attached.

http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kernel=
debug-deadlocks.html

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