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lib/iscsi: fix another assertion failure of 'assert(task->ref > 0)'

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In high read IO pressure, there is a loop call of process_completed_read_subtask_list()
while calling spdk_iscsi_task_response(), this cause 'primary->bytes_completed'
changes, in turn cause multiple calls of 'spdk_iscsi_task_put(primary)', assertion
failes in spdk_scsi_task_put().

Signed-off-by: Sochin Jiang <jiangxiaoqing.sochin@bytedance.com>
Change-Id: I41d02d318f827f3bb3ad9ba3a06e080b5113cd40
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4083
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Community-CI: Mellanox Build Bot
This commit is contained in:
Sochin Jiang 2020-09-07 15:16:32 +08:00 committed by Tomasz Zawadzki
parent eda91a7b07
commit 8d081e74c1
1 changed files with 3 additions and 4 deletions
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7
lib/iscsi/conn.c
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@ -1088,16 +1088,15 @@ process_completed_read_subtask_list(struct spdk_iscsi_conn *conn,
if (subtask->scsi.offset == primary->bytes_completed) {
TAILQ_REMOVE(&primary->subtask_list, subtask, subtask_link);
primary->bytes_completed += subtask->scsi.length;
if (primary->bytes_completed == primary->scsi.transfer_len) {
iscsi_task_put(primary);
}
iscsi_task_response(conn, subtask);
iscsi_task_put(subtask);
} else {
break;
}
}
if (primary->bytes_completed == primary->scsi.transfer_len) {
iscsi_task_put(primary);
}
}
static void