Home » Mailing list archives » linux-kernel » 2008 » May » 28

Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to fix a race

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
[view in full thread]
From: Luming Yu
Subject: Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to fix a race
Date: Wednesday, May 28, 2008 - 2:14 am

Some correction about the test case hang,  the ps output should looks
like the following:
13925 S+ strace -f ./test1
13926 S+ ./test1
13927 T+  /bin/bash ./test2

I'm trying upstream kdump to get more detailed data for help analysis
the scenario..
But unfortunately upstream kernel just hang when I echo c to
sysrq-trigger.  Downgrade the kernel to 2.6.22,  'echo c' doesn't
hang, but I just got "zero" dump file...
Will try F9 later... But from the symptom shouldn't we ask this
question: why  process 13927 can't wake up?  Roland,  please confirm
if ptrace_untrace is the only way to get Traced process wake up?  Back
up to caller of ptrace_untrace, maybe we can find out why my RFC patch
happen to fix the problem... Any suggestions are welcome!
--Luming
--
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Messages in current thread:
[RFC PATCH] set TASK_TRACED before arch_ptrace code to fix ..., Luming Yu, (Wed May 21, 7:47 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Petr Tesarik, (Thu May 22, 1:47 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Thu May 22, 2:16 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Thu May 22, 4:18 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Petr Tesarik, (Thu May 22, 5:12 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Thu May 22, 6:24 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Thu May 22, 1:34 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Thu May 22, 1:39 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Thu May 22, 8:42 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Thu May 22, 9:19 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Thu May 22, 10:24 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Fri May 23, 5:33 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Sun May 25, 5:15 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Sun May 25, 6:30 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Mon May 26, 8:31 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Mon May 26, 9:04 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Mon May 26, 10:49 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Mon May 26, 11:12 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Petr Tesarik, (Mon May 26, 11:25 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Mon May 26, 11:34 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Tue May 27, 1:48 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Wed May 28, 2:14 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Fri May 30, 1:05 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Mon Jun 2, 11:02 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Mon Jun 2, 11:04 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Petr Tesarik, (Tue Jun 3, 2:01 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Petr Tesarik, (Tue Jun 3, 7:32 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Tue Jun 3, 2:01 pm)
RE: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luck, Tony, (Tue Jun 3, 2:31 pm)
RE: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Tue Jun 3, 3:13 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Tue Jun 3, 7:16 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Petr Tesarik, (Wed Jun 4, 2:16 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Wed Jun 4, 6:49 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Petr Tesarik, (Thu Jun 5, 4:16 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Thu Jun 5, 5:07 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Tue Jun 10, 1:23 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Mon Sep 8, 8:06 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Tue Sep 9, 10:55 pm)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Tue Sep 16, 1:50 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Roland McGrath, (Wed Sep 17, 10:01 am)
Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to ..., Luming Yu, (Wed Sep 17, 10:44 pm)