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SubjectRe: [PATCH] Documentation: fix getdelays.c example -l option and segv
Michael Neuling wrote:
> Fix a couple of minor issues with the getdelays.c example code.
>
> Signed-off-by: Michael Neuling <mikey@neuling.org>
> ---
> Documentation/accounting/getdelays.c | 21 +++++++++++----------
> 1 file changed, 11 insertions(+), 10 deletions(-)
>
> Index: linux-2.6-ozlabs/Documentation/accounting/getdelays.c
> ===================================================================
> --- linux-2.6-ozlabs.orig/Documentation/accounting/getdelays.c
> +++ linux-2.6-ozlabs/Documentation/accounting/getdelays.c
> @@ -196,7 +196,7 @@ void print_delayacct(struct taskstats *t
> "IO %15s%15s\n"
> " %15llu%15llu\n"
> "MEM %15s%15s\n"
> - " %15llu%15llu\n"
> + " %15llu%15llu\n",

This change looks good!

> "count", "real total", "virtual total", "delay total",
> t->cpu_count, t->cpu_run_real_total, t->cpu_run_virtual_total,
> t->cpu_delay_total,
> @@ -335,17 +335,17 @@ int main(int argc, char *argv[])
> }
> }
>
> - if (tid) {
> - rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET,
> - cmd_type, &tid, sizeof(__u32));
> - PRINTF("Sent pid/tgid, retval %d\n", rc);
> - if (rc < 0) {
> - fprintf(stderr, "error sending tid/tgid cmd\n");
> - goto done;
> + do {
> + if (tid) {
> + rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET,
> + cmd_type, &tid, sizeof(__u32));
> + PRINTF("Sent pid/tgid, retval %d\n", rc);
> + if (rc < 0) {
> + fprintf(stderr, "error sending tid/tgid cmd\n");
> + goto done;
> + }
> }
> - }
>
> - do {
> int i;
>
> rep_len = recv(nl_sd, &msg, sizeof(msg), 0);
> @@ -430,6 +430,7 @@ int main(int argc, char *argv[])
> }
> na = (struct nlattr *) (GENLMSG_DATA(&msg) + len);
> }
> + sleep(2);

Is this really required? a sleep() in the code. Why do we do multiple send_cmd()'s
in the do loop? I'll test and get back.

> } while (loop);
> done:
> if (maskset) {
>
>
>
>


--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
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