[CRIU] [PATCH] dump: wait task stopped for 1 sec

[Kinsbursky Stanislav]

From: Stanislav Kinsbursky <skinsbursky at parallels.com>

Wait for 1 sec in case of task is not stopped to dump stage and check it's
state once more.
Should help against this error:

Obtainting task stat ... Error (cr-dump.c:1213): Task in bad state: R

Signed-off-by: Stanislav Kinsbursky <skinsbursky at parallels.com>

---
 cr-dump.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/cr-dump.c b/cr-dump.c
index 78d4b9b..af31a89 100644
--- a/cr-dump.c
+++ b/cr-dump.c
@@ -1186,6 +1186,7 @@ static int dump_one_task(struct pstree_item *item, struct cr_fdset *cr_fdset)
 	int ret = -1;
 	int pid_dir;
 	struct parasite_dump_misc misc;
+	int attempt = 0;
 
 	pr_info("========================================\n");
 	pr_info("Dumping task (pid: %d)\n", pid);
@@ -1198,6 +1199,7 @@ static int dump_one_task(struct pstree_item *item, struct cr_fdset *cr_fdset)
 	}
 
 	pr_info("Obtainting task stat ... ");
+retry:
 	ret = parse_pid_stat(pid, pid_dir, &pps_buf);
 	if (ret < 0)
 		goto err;
@@ -1209,6 +1211,11 @@ static int dump_one_task(struct pstree_item *item, struct cr_fdset *cr_fdset)
 		/* Stopped -- can dump one */
 		break;
 	default:
+		if (attempt++ == 0) {
+			sleep(1);
+			pr_err("Trying once more\n");
+			goto retry;
+		}
 		ret = -1;
 		pr_err("Task in bad state: %c\n", pps_buf.state);
 		goto err;