Re: how to capture kernel panics

[Jeff Moyer <jmoyer@redhat.com>]

==> Regarding Re: how to capture kernel panics; Christian Borntraeger <linux-kernel@borntraeger.net> adds:

linux-kernel> shabanip wrote:
>> is there any way to capture and log kernel panics on disk or ...?

linux-kernel> In former times, the Linux kernel tried to sync in the panic
linux-kernel> function. (If the panic did not happen in interrupt context)
linux-kernel> Unfortunately this had severe side effects in cases where the
linux-kernel> panic was triggered by file system block device code or any
linux-kernel> other part which is necessary for syncing. In most cases the
linux-kernel> call trace never made it onto disk anyway. So currently the
linux-kernel> kernel does not support saving a panic.

linux-kernel> Apart from using a serial console, you might have a look at
linux-kernel> several kexec/kdump/lkcd tools where people are working on
linux-kernel> being able to dump the memory of a paniced kernel.

Or netconsole, which will dump printk's do the server:port of your
choosing.

-Jeff