linux-kernel - Re: LTP 20080131 causes defunct processes w/2.6.30-rc1 (possible ptrace issue?)

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Message-ID: <20090410010319.GA2354@us.ibm.com>
Date:	Thu, 9 Apr 2009 18:03:19 -0700
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Kumar Gala <galak@...nel.crashing.org>
Cc:	oleg@...hat.com,
	linux-kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: LTP 20080131 causes defunct processes w/2.6.30-rc1 (possible
	ptrace issue?)

>
> -bash-3.2# ps
>  PID TTY          TIME CMD
> 2289 ttyS0    00:00:00 bash
> 2310 ttyS0    00:00:00 runltp
> 2412 ttyS0    00:00:00 pan
> 2448 ttyS0    00:00:00 recv01 <defunct>
> 2450 ttyS0    00:00:00 recvfrom01 <defunct>
> 2452 ttyS0    00:00:00 recvmsg01 <defunct>
> 2473 ttyS0    00:00:00 rename14
> 2474 ttyS0    00:00:01 rename14
> 2477 ttyS0    00:00:00 rename14
> 2481 ttyS0    00:00:00 ps
> -bash-3.2# cat /proc/1/status
> Name:   init
> State:  T (stopped)

init is in the stopped state.  Can you run "kill -CONT 1" ?

> Tgid:   1
> Pid:    1
> PPid:   0
> TracerPid:      0
> Uid:    0       0       0       0
> Gid:    0       0       0       0
> FDSize: 32
> Groups:
> VmPeak:     1948 kB
> VmSize:     1944 kB
> VmLck:         0 kB
> VmHWM:       648 kB
> VmRSS:       648 kB
> VmData:      164 kB
> VmStk:        84 kB
> VmExe:       288 kB
> VmLib:      1124 kB
> VmPTE:        20 kB
> Threads:        1
> SigQ:   8/16384
> SigPnd: 0000000000000000
> ShdPnd: 0000000000010000

Init does have the pending SIGCHLD, so the zombies should go away 
when init gets the SIGCONT.
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