* [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace
@ 2018-01-29 12:54 Zhou Wenjian
2018-02-08 11:53 ` Zhou Wenjian
0 siblings, 1 reply; 6+ messages in thread
From: Zhou Wenjian @ 2018-01-29 12:54 UTC (permalink / raw)
To: kexec; +Cc: ats-kumagai, Zhou Wenjian
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@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();
--
1.8.3.1
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^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace
2018-01-29 12:54 [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace Zhou Wenjian
@ 2018-02-08 11:53 ` Zhou Wenjian
[not found] ` <61D4E5D821F1674CB87C99F080A210BE0117AC32@BPXM01GP.gisp.nec.co.jp>
2018-02-16 2:45 ` Masaki Tachibana
0 siblings, 2 replies; 6+ messages in thread
From: Zhou Wenjian @ 2018-02-08 11:53 UTC (permalink / raw)
To: kexec; +Cc: ats-kumagai, Keiichirou Suzuki
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@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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^ permalink raw reply [flat|nested] 6+ messages in thread[parent not found: <61D4E5D821F1674CB87C99F080A210BE0117AC32@BPXM01GP.gisp.nec.co.jp>]
* FW: [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace
[not found] ` <61D4E5D821F1674CB87C99F080A210BE0117AC32@BPXM01GP.gisp.nec.co.jp>
@ 2018-02-09 11:23 ` Masahiko Hayashi
2018-02-09 11:31 ` Masahiko Hayashi
1 sibling, 0 replies; 6+ messages in thread
From: Masahiko Hayashi @ 2018-02-09 11:23 UTC (permalink / raw)
To: Zhou Wenjian; +Cc: kexec
>-----Original Message-----
>From: Tachibana Masaki(橘 正樹)
>Sent: Friday, February 09, 2018 8:05 PM
>To: Zhou Wenjian <zhouwj.fi@gmail.com>
>Cc: kexec@lists.infradead.org; Hayashi Masahiko(林 正彦) <mas-hayashi@tg.jp.nec.com>
>Subject: RE: [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace
>
>Hi Zhou,
>
>Sorry for the late reply.
>Makedumpfile team are busy now for another development.
>I'll reply in about a week.
>
>Thanks
>tachibana
>
>> -----Original Message-----
>> From: kexec [mailto:kexec-bounces@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-kumagai@wm.jp.nec.com>; Suzuki Keiichirou <kei-suzuki@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.fi@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
>>
>>
>> _______________________________________________
>> kexec mailing list
>> kexec@lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/kexec
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 6+ messages in thread* RE: [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace
[not found] ` <61D4E5D821F1674CB87C99F080A210BE0117AC32@BPXM01GP.gisp.nec.co.jp>
2018-02-09 11:23 ` FW: " Masahiko Hayashi
@ 2018-02-09 11:31 ` Masahiko Hayashi
1 sibling, 0 replies; 6+ messages in thread
From: Masahiko Hayashi @ 2018-02-09 11:31 UTC (permalink / raw)
To: Zhou Wenjian; +Cc: kexec
Hi Zhou-san
I will forward Tachibana's mail.
Thank you
>-----Original Message-----
>From: Hayashi Masahiko(林 正彦)
>Sent: Friday, February 09, 2018 8:24 PM
>To: Zhou Wenjian <zhouwj.fi@gmail.com>
>Cc: kexec@lists.infradead.org
>Subject: FW: [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace
>
>>-----Original Message-----
>>From: Tachibana Masaki(橘 正樹)
>>Sent: Friday, February 09, 2018 8:05 PM
>>To: Zhou Wenjian <zhouwj.fi@gmail.com>
>>Cc: kexec@lists.infradead.org; Hayashi Masahiko(林 正彦) <mas-hayashi@tg.jp.nec.com>
>>Subject: RE: [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace
>>
>>Hi Zhou,
>>
>>Sorry for the late reply.
>>Makedumpfile team are busy now for another development.
>>I'll reply in about a week.
>>
>>Thanks
>>tachibana
>>
>>> -----Original Message-----
>>> From: kexec [mailto:kexec-bounces@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-kumagai@wm.jp.nec.com>; Suzuki Keiichirou <kei-suzuki@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.fi@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
>>>
>>>
>>> _______________________________________________
>>> kexec mailing list
>>> kexec@lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/kexec
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace
2018-02-08 11:53 ` Zhou Wenjian
[not found] ` <61D4E5D821F1674CB87C99F080A210BE0117AC32@BPXM01GP.gisp.nec.co.jp>
@ 2018-02-16 2:45 ` Masaki Tachibana
2018-02-27 13:08 ` Zhou Wenjian
1 sibling, 1 reply; 6+ messages in thread
From: Masaki Tachibana @ 2018-02-16 2:45 UTC (permalink / raw)
To: kexec; +Cc: Masahiko Hayashi
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-bounces@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-kumagai@wm.jp.nec.com>; Suzuki Keiichirou() <kei-suzuki@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.fi@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
>
>
> _______________________________________________
> kexec mailing list
> kexec@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec
_______________________________________________
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http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace
2018-02-16 2:45 ` Masaki Tachibana
@ 2018-02-27 13:08 ` Zhou Wenjian
0 siblings, 0 replies; 6+ messages in thread
From: Zhou Wenjian @ 2018-02-27 13:08 UTC (permalink / raw)
To: Masaki Tachibana, kexec; +Cc: Masahiko Hayashi
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-bounces@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-kumagai@wm.jp.nec.com>; Suzuki Keiichirou() <kei-suzuki@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.fi@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
>>
>>
>> _______________________________________________
>> kexec mailing list
>> kexec@lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/kexec
>
>
> _______________________________________________
> kexec mailing list
> kexec@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec
>
--
Thanks
Zhou
_______________________________________________
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-02-27 13:08 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-01-29 12:54 [PATCH] makedumpfile: Fix a bug when multi-threads feature meets enospace Zhou Wenjian
2018-02-08 11:53 ` Zhou Wenjian
[not found] ` <61D4E5D821F1674CB87C99F080A210BE0117AC32@BPXM01GP.gisp.nec.co.jp>
2018-02-09 11:23 ` FW: " Masahiko Hayashi
2018-02-09 11:31 ` Masahiko Hayashi
2018-02-16 2:45 ` Masaki Tachibana
2018-02-27 13:08 ` Zhou Wenjian
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