[CRIU] crtools error: "can't splice to pipe"
Pavel Emelyanov
xemul at parallels.com
Wed Apr 30 04:17:03 PDT 2014
On 04/30/2014 02:28 PM, Cyrill Gorcunov wrote:
>
> Could you please try the patch attached? Need to figure out why access on
> some pages are failing. The dump log will be big so don't get surprised.
> @@ -68,6 +85,19 @@ static int dump_pages(struct parasite_dump_pages_args *args)
> return -1;
>
> iovs = pargs_iovs(args);
> +
> + {
> + struct iovec *v = &iovs[args->off];
> + size_t i, j;
> +
> + for (i = 0, v = &iovs[args->off]; i < args->nr_segs; i++, v++) {
> + for (j = 0; j < v->iov_len; j += PAGE_SIZE) {
> + pr_msg("dump_pages %lx\n", (unsigned long)v->iov_base + j);
> + builtin_memcpy(____data, v->iov_base + j, PAGE_SIZE);
> + }
> + }
> + }
> +
> ret = sys_vmsplice(p, &iovs[args->off], args->nr_segs,
> SPLICE_F_GIFT | SPLICE_F_NONBLOCK);
> if (ret != PAGE_SIZE * args->nr_pages) {
>
The ____data thing is write-only. What is it for?
Thanks,
Pavel
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