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SubjectRe: [RFC][PATCH 0/4] kernel-based checkpoint restart
Date
On Friday 08 August 2008, Dave Hansen wrote:
> These patches are from Oren Laaden. I've refactored them
> a bit to make them a wee bit more reviewable. I think this
> separates out the per-arch bits pretty well. It should also
> be at least build-bisetable.

Cool stuff

> ============================== ckpt.c ================================
>
> #define _GNU_SOURCE /* or _BSD_SOURCE or _SVID_SOURCE */
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <errno.h>
> #include <fcntl.h>
> #include <unistd.h>
> #include <asm/unistd_32.h>
> #include <sys/syscall.h>

Note that asm/unistd_32.h is not portable, you should use asm/unistd.h
in the example.

> pid_t pid = getpid();
> int ret;
>
> ret = syscall(__NR_checkpoint, pid, STDOUT_FILENO, 0);

Interface-wise, I would consider checkpointing yourself signficantly
different from checkpointing some other thread. If checkpointing
yourself is the common case, it probably makes sense to allow passing
of pid=0 for this.
Arnd <><


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