Hi Tachibana,
Thanks for your reply.
And I do appreciate Kumagai-san's help these years.
On 02/16/2018 10:45 AM, Masaki Tachibana wrote:
Hi,
Atsushi Kumagai has retired, so other members will maintain makedumpfile.
Wenjian
Sorry for the late reply.
Your patch looks good to me.
I'll merge it into V1.6.4.
Thanks
tachibana
-----Original Message-----
From: kexec [mailto:kexec-boun...@lists.infradead.org] On Behalf Of Zhou Wenjian
Sent: Thursday, February 08, 2018 8:53 PM
To: kexec@lists.infradead.org
Cc: Kumagai Atsushi() <ats-kuma...@wm.jp.nec.com>; Suzuki Keiichirou()
<kei-suz...@xr.jp.nec.com>
Subject: Re: [PATCH] makedumpfile: Fix a bug when multi-threads feature meets
enospace
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...@gmail.com>
---
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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--
Thanks
Zhou
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