[RFC 0/2] Fix Freezer related races.

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From: Gautham R Shenoy <ego@...>

To: Oleg Nesterov <oleg@...>, Rafael J. Wysocki <rjw@...>

Cc: <linux-kernel@...>, <akpm@...>, <mingo@...>, <vatsa@...>, <paulmck@...>, <pavel@...>

Subject: [RFC 0/2] Fix Freezer related races.

Date: Thursday, April 19, 2007 - 8:01 am

Hello Everyone, 
Oleg had pointed out some subtle races which could lead to the failure
of the process freezer in the patchset which I had posted earlier.

A couple of these problems seem to be present in the latest -mm(2.6.21-rc6-mm1).

This is an attempt to fix them.

Awaiting you feedback, 
Regards
gautham.
-- 
Gautham R Shenoy
Linux Technology Center
IBM India.
"Freedom comes with a price tag of responsibility, which is still a bargain,
because Freedom is priceless!"
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Messages in current thread:

[RFC 0/2] Fix Freezer related races., Gautham R Shenoy, (Thu Apr 19, 8:01 am)

[RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop race, Gautham R Shenoy, (Thu Apr 19, 8:04 am)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Oleg Nesterov, (Fri Apr 20, 5:12 pm)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Gautham R Shenoy, (Mon Apr 23, 6:38 am)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Oleg Nesterov, (Mon Apr 23, 2:39 pm)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Gautham R Shenoy, (Mon Apr 23, 4:34 pm)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Andrew Morton, (Thu Apr 19, 5:31 pm)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Gautham R Shenoy, (Fri Apr 20, 6:46 am)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Pavel Machek, (Sat Apr 21, 5:37 am)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Rafael J. Wysocki, (Fri Apr 20, 4:54 am)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Gautham R Shenoy, (Fri Apr 20, 7:05 am)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Oleg Nesterov, (Fri Apr 20, 5:20 pm)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Rafael J. Wysocki, (Fri Apr 20, 5:45 pm)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Rafael J. Wysocki, (Fri Apr 20, 7:59 am)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Gautham R Shenoy, (Fri Apr 20, 8:26 am)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Andrew Morton, (Fri Apr 20, 1:30 pm)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Ingo Molnar, (Fri Apr 20, 2:31 pm)

[RFC][PATCH -mm 0/3] Separate freezer flags, Rafael J. Wysocki, (Sun Apr 22, 3:28 pm)

[RFC][PATCH -mm 1/3] Separate freezer from PM code, Rafael J. Wysocki, (Sun Apr 22, 3:33 pm)

Re: [RFC][PATCH -mm 1/3] Separate freezer from PM code, Pavel Machek, (Mon Apr 23, 6:41 am)

[RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Rafael J. Wysocki, (Sun Apr 22, 3:39 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Oleg Nesterov, (Mon Apr 23, 6:23 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Rafael J. Wysocki, (Mon Apr 23, 6:40 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Oleg Nesterov, (Mon Apr 23, 6:55 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Rafael J. Wysocki, (Mon Apr 23, 7:10 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Oleg Nesterov, (Mon Apr 23, 7:19 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Rafael J. Wysocki, (Tue Apr 24, 7:32 am)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Gautham R Shenoy, (Mon Apr 23, 6:41 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Rafael J. Wysocki, (Mon Apr 23, 6:55 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Gautham R Shenoy, (Mon Apr 23, 9:17 am)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Rafael J. Wysocki, (Mon Apr 23, 3:57 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Pavel Machek, (Mon Apr 23, 6:50 am)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Satyam Sharma, (Mon Apr 23, 12:09 am)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Rafael J. Wysocki, (Mon Apr 23, 3:06 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Gautham R Shenoy, (Mon Apr 23, 10:19 am)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Rafael J. Wysocki, (Mon Apr 23, 2:49 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Paul Jackson, (Sun Apr 22, 5:14 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Rafael J. Wysocki, (Sun Apr 22, 6:14 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Paul Jackson, (Sun Apr 22, 6:31 pm)

Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags, Satyam Sharma, (Sun Apr 22, 11:18 pm)

[RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_stop, Rafael J. Wysocki, (Sun Apr 22, 3:40 pm)

Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s..., Gautham R Shenoy, (Mon Apr 23, 8:35 am)

Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s..., Rafael J. Wysocki, (Mon Apr 23, 3:55 pm)

Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s..., Oleg Nesterov, (Mon Apr 23, 4:46 pm)

Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s..., Gautham R Shenoy, (Mon Apr 23, 5:16 pm)

Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s..., Rafael J. Wysocki, (Mon Apr 23, 5:30 pm)

Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s..., Oleg Nesterov, (Mon Apr 23, 3:03 pm)

Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s..., Rafael J. Wysocki, (Mon Apr 23, 4:05 pm)

Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s..., Pavel Machek, (Mon Apr 23, 6:40 am)

Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s..., Rafael J. Wysocki, (Mon Apr 23, 3:50 pm)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Rafael J. Wysocki, (Fri Apr 20, 5:13 pm)

Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r..., Rafael J. Wysocki, (Fri Apr 20, 8:50 am)

[RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race, Gautham R Shenoy, (Thu Apr 19, 8:02 am)

Re: [RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race, Rafael J. Wysocki, (Thu Apr 19, 5:39 pm)

Re: [RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race, Oleg Nesterov, (Fri Apr 20, 2:02 pm)

Re: [RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race, Gautham R Shenoy, (Mon Apr 23, 6:26 am)

Re: [RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race, Oleg Nesterov, (Mon Apr 23, 1:49 pm)

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