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SubjectRe: [RFC]Kexec based crash dumping
Hi.

It is interesting.

We(*) also make crash dump acording to similer concept.
(*) NTT Data Corporation & VA Linux Systems Japan K.K.

Our main idea is the following.

- prepare a kernel which does only dump real memory to block
device. ("dump mini kernel")
- pre-allocate the memory (4MB is enough) used by the dump mini
kernel and pre-load the dump mini kernel.
- when crash occur exec the dump mini kernel.
- the dump mini kernel stands in and only uses pre-allocated
area.

We made mkexec(mini kernel exec) based on kexec code but
simplify a lot. Mkexec can co-exist kexec and can be kernel
module. We made also "dump mini kernel".
(now i386 only)

We will open our code shortly. (maybe I think)
I think there are many items to be able to cooperate.

Thank you.
--
Itsuro ODA <oda@valinux.co.jp>

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