ping...
On 01/29/2018 08:54 PM, Zhou Wenjian wrote:
Currently, when multi-threads feature meets enospace error,
the main thread will call pthread_join(). However, there is one
thread doing while{} and won't stop.
pthread_mutex_lock(&info->page_data_mutex);
while (page_data_buf[index].used != FALSE) {
index = (index + 1) % info->num_buffers;
}
page_data_buf[index].used = TRUE;
pthread_mutex_unlock(&info->page_data_mutex);
Then makedumpfile hangs.
This patch add a cancel point in while{}.
Signed-off-by: Zhou Wenjian <zhouwj.fi@xxxxxxxxx>
---
makedumpfile.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/makedumpfile.c b/makedumpfile.c
index ed138d3..f7ad50c 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -7731,11 +7731,13 @@ kdump_thread_function_cyclic(void *arg) {
buf_ready = FALSE;
pthread_mutex_lock(&info->page_data_mutex);
+ pthread_cleanup_push(pthread_mutex_unlock, &info->page_data_mutex);
while (page_data_buf[index].used != FALSE) {
+ pthread_testcancel();
index = (index + 1) % info->num_buffers;
}
page_data_buf[index].used = TRUE;
- pthread_mutex_unlock(&info->page_data_mutex);
+ pthread_cleanup_pop(1);
while (buf_ready == FALSE) {
pthread_testcancel();
--
Thanks
Zhou
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