Messages in this thread | | | From | Haar János <> | Subject | Re: How to send a break? - dump from frozen 64bit linux | Date | Sun, 28 May 2006 09:04:27 +0200 |
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----- Original Message ----- From: "Jim Crilly" <jim@why.dont.jablowme.net> To: "Haar János" <djani22@netcenter.hu> Cc: <linux-kernel@vger.kernel.org> Sent: Sunday, May 28, 2006 1:43 AM Subject: Re: How to send a break?
> On 05/27/06 02:58:44PM +0200, Haar János wrote: > > Hello, list, > > > > I wish to know, how to send a "BREAK" to trigger the sysreq functions on the > > serial line, using echo. > > > > I mean like this: > > > > #!/bin/bash > > echo "?BREAK?" >/dev/ttyS0 > > sleep 2 > > echo "m" >/dev/ttyS0 > > > > Is there a reason you can't use "echo -n m > /proc/sysrq-trigger"?
Yes, i want to dump my frequently frozen remote server, automatically, if it is possible. (using null-modem cable, and another server.)
Anyway, i made it this time by hand.
Here is the dump: http://download.netcenter.hu/bughunt/20060528/log.txt (400KB!)
Can somebody tell me, what is wrong exactly?
Anyway, i interested about, how can i -a single user- interpret these dump to made error reporting more useful?
The problem: I used one stable system on 32bit, but i need to switch to X86_64, because the nbd cannot use >2TB devices on 32bit. I have reinstall the RH 9.0 to FC 5.0, and recompiled everything what i used to serving. (the OS is only for external tasks.)
But on 64bit, my system becomes unstable. Sometimes it is frozen, but no error message at all! I can see, the crond-jobs is hangs too, but syslog can post messages, but no valuable at all. (I cannot login with ssh.)
Thats why i need to dump with serial console.
Can somebody help me? :-)
Here is the "normal" dmesg message: http://download.netcenter.hu/bughunt/20060528/dmesg.txt (21KB)
Thanks, Janos
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