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Re: [PATCH][usercr]: Ghost tasks must be detached [message #41627 is a reply to message #41623]

Thu, 10 February 2011 22:31

Sukadev Bhattiprolu is currently offline

Sukadev Bhattiprolu
Messages: 413
Registered: August 2006

Senior Member

Louis Rilling [Louis.Rilling@kerlabs.com] wrote:
| On 10/02/11 9:54 -0800, Sukadev Bhattiprolu wrote:
| > Louis Rilling [Louis.Rilling@kerlabs.com] wrote:

| > If it was a detached task, do_wait_thread() skipped over it. In the C/R
| > kernel we were setting the ->exit_signal to -1 for a "ghost" process.
| > I assumed that the container-init exited without waiting for the "ghost"
| > and we were getting the crash in proc_flush_mnt() when the ghost exited.
|
| The point is that wait_consider_task() skips detached tasks as soon as they are
| not ptraced. So removing the check in do_wait_thread() should not have changed
| the behavior. Am I missing something?

No. I was :-) You are right that it did not change the behavior. I still
need to investigate why the crash does not occur on 2.6.37 even without
Eric's fix.

Sukadev
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[Message index]

		Re: [PATCH][usercr]: Ghost tasks must be detached By: Oren Laadan on Sat, 05 February 2011 18:55
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Sat, 05 February 2011 21:40
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Oren Laadan on Sat, 05 February 2011 22:02
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Oren Laadan on Sat, 05 February 2011 22:33
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Wed, 09 February 2011 02:09
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Oren Laadan on Wed, 09 February 2011 03:35
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Thu, 10 February 2011 02:44
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Oren Laadan on Thu, 10 February 2011 03:53
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Thu, 10 February 2011 06:17
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Oren Laadan on Thu, 10 February 2011 14:56
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Thu, 10 February 2011 17:42
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Wed, 16 February 2011 20:10
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Louis Rilling on Thu, 17 February 2011 15:21
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Mon, 21 February 2011 20:40
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Louis Rilling on Tue, 22 February 2011 10:28
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Louis Rilling on Wed, 09 February 2011 12:01
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Oren Laadan on Wed, 09 February 2011 12:18
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Louis Rilling on Wed, 09 February 2011 12:35
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Louis Rilling on Wed, 09 February 2011 12:37
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Wed, 09 February 2011 19:02
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Louis Rilling on Thu, 10 February 2011 10:23
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Thu, 10 February 2011 17:54
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Louis Rilling on Thu, 10 February 2011 18:04
		Re: [PATCH][usercr]: Ghost tasks must be detached By: Sukadev Bhattiprolu on Thu, 10 February 2011 22:31

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