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Date:      Wed, 14 Mar 2012 13:27:20 -0700
From:      Julian Elischer <julian@freebsd.org>
To:        Artem Belevich <art@freebsd.org>
Cc:        Maninya M <maninya@gmail.com>, freebsd-hackers@freebsd.org
Subject:   Re: Capture states of all processes at the same time
Message-ID:  <4F60FF28.8010104@freebsd.org>
In-Reply-To: <CAFqOu6gkzk4A_o74P4fd-q8RDHsHy88grEg1G7ksc2tjwV6UFA@mail.gmail.com>
References:  <CAC46K3mNJQDf%2BKqA0YYiAXXdyjhU3iSX8V-5%2B2rF8Ah0aH-7rA@mail.gmail.com>	<CAFqOu6i1TY-4FcGYEqvD00uz2qx9yL971s0Ca6PsxEVSTjnCSQ@mail.gmail.com>	<CAC46K3kcuoDt92tj5yQN2E9Aj%2BRVihaA-NXUTaZBm8WFGZVC-Q@mail.gmail.com>	<CAC46K3=Kq=J9fqfyV8FewmE49gcNh_C-rmL4rZu1PrRicTvhGA@mail.gmail.com> <CAFqOu6gkzk4A_o74P4fd-q8RDHsHy88grEg1G7ksc2tjwV6UFA@mail.gmail.com>

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On 3/14/12 12:02 PM, Artem Belevich wrote:
> On Wed, Mar 14, 2012 at 11:25 AM, Maninya M<maninya@gmail.com>  wrote:
>> Then typed this to force a panic:
>>
>> sysctl debug.kdb.panic=1
>>
>> The computer just hung after this, and after waiting for a while I pressed
>> the reboot button.
>> It said "no core dumps found" while rebooting.
> First, make sure you have swap space configured. If minidump is not
> enabled (check sysctl debug.minidump) you will need to make sure you
> have more swap space than physical memory.
> Then make sure that dump device is set up correctly. See dumpdev in rc.conf(5)
>
> If that didn't work, you may be running into the issue in PR kern/155421:
> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern%2F155421&cat=
>
> Alas, I don't know what to do about that.

or just do "ps" from ddb and then continue.

you can set things up in 9 (and maybe 8, I don't know) to capture the 
ddb output..


> --Artem
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