Hi, I don't like calling crash_kexec() directly in (ex.) panic(). It should be call_dump_hook() (or something like this).
I think the necessary modifications of the kernel is only: - insert the hooks that calls a dump function when crash occur - binding interface that binds a dump function to the hook (like register_dump_hook()) - supply the information of valid physical address regions (- maybe some existent functions and variables need to be exported ?) I think this makes any sort of dump functions can be implemented as a kernel module. I don't think it is best way that the "kexec based crashdump" is built in the kernel. Thanks. On 01 Feb 2005 02:06:42 -0700 [EMAIL PROTECTED] (Eric W. Biederman) wrote: > Koichi Suzuki <[EMAIL PROTECTED]> writes: > > > Hook in panic code is very good idea and is useful in various scenes. It > > could > > be used to kick RAM dump code, obviously, and also kick the code to initiate > > failover, etc. Various use could be possible so I believe that this hook > > should be prepared for wider use. > > It is. Basically it is the normal kexec interface that allows you to > boot another kernel. With a few restrictions that should keep it as > reliable as possible when the kernel has not shut itself down cleanly. > > The hardest case is to do a useful system core dump. As that requires > looking at what has gone before. For the rest if you can do it > with a kernel and a initramfs you are in good shape. > > There seems to be a significant amount of interest in the full > system core dump case so that is what the work is concentrating > on. > > Eric > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Itsuro ODA <[EMAIL PROTECTED]> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
