2003-09-29 19:16:08

by Ricardo Galli

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Subject: 2.6.0-test6-mm1: too many defunct event threads

Just tested -mm1 in my laptop, with synaptics drivers, and saw lots of
zombi event threads.

This does not occur in stock -test6.

gallir@minime:~$ ps ax| grep events
3 ? SW< 0:00 [events/0]
389 ? Z< 0:00 [events/0] <defunct>
391 ? Z< 0:00 [events/0] <defunct>
393 ? Z< 0:00 [events/0] <defunct>
396 ? Z< 0:00 [events/0] <defunct>
398 ? Z< 0:00 [events/0] <defunct>
400 ? Z< 0:00 [events/0] <defunct>
402 ? Z< 0:00 [events/0] <defunct>
404 ? Z< 0:00 [events/0] <defunct>
406 ? Z< 0:00 [events/0] <defunct>
434 ? Z< 0:00 [events/0] <defunct>
436 ? Z< 0:00 [events/0] <defunct>
438 ? Z< 0:00 [events/0] <defunct>
440 ? Z< 0:00 [events/0] <defunct>
442 ? Z< 0:00 [events/0] <defunct>
444 ? Z< 0:00 [events/0] <defunct>
450 ? Z< 0:00 [events/0] <defunct>
452 ? Z< 0:00 [events/0] <defunct>
454 ? Z< 0:00 [events/0] <defunct>
456 ? Z< 0:00 [events/0] <defunct>
462 ? Z< 0:00 [events/0] <defunct>
464 ? Z< 0:00 [events/0] <defunct>
466 ? Z< 0:00 [events/0] <defunct>
469 ? Z< 0:00 [events/0] <defunct>
471 ? Z< 0:00 [events/0] <defunct>
473 ? Z< 0:00 [events/0] <defunct>
544 ? Z< 0:00 [events/0] <defunct>
707 ? Z< 0:00 [events/0] <defunct>
709 ? Z< 0:00 [events/0] <defunct>
711 ? Z< 0:00 [events/0] <defunct>
713 ? Z< 0:00 [events/0] <defunct>
738 ? Z< 0:00 [events/0] <defunct>
740 ? Z< 0:00 [events/0] <defunct>
742 ? Z< 0:00 [events/0] <defunct>
745 ? Z< 0:00 [events/0] <defunct>
776 ? Z< 0:00 [events/0] <defunct>
779 ? Z< 0:00 [events/0] <defunct>
783 ? Z< 0:00 [events/0] <defunct>
785 ? Z< 0:00 [events/0] <defunct>


Regards,

--
ricardo galli GPG id C8114D34
http://mnm.uib.es/~gallir/


2003-09-29 19:27:48

by Chris Wright

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Subject: Re: 2.6.0-test6-mm1: too many defunct event threads

* Ricardo Galli ([email protected]) wrote:
> Just tested -mm1 in my laptop, with synaptics drivers, and saw lots of
> zombi event threads.

Please revert the call_usermodehelper patch.

ftp:/ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.0-test6/2.6.0-test6-mm1/broken-out/call_usermodehelper-retval-fix-2.patch

thanks,
-chris
--
Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net

2003-09-29 19:47:17

by Ricardo Galli

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Subject: Re: 2.6.0-test6-mm1: too many defunct event threads

On Monday 29 September 2003 21:27, Chris Wright shaped the electrons to
shout:
> * Ricardo Galli ([email protected]) wrote:
> > Just tested -mm1 in my laptop, with synaptics drivers, and saw lots
> > of zombi event threads.
>
> Please revert the call_usermodehelper patch.
>
> ftp:/ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.0-test
>6/2.6.0-test6-mm1/broken-out/call_usermodehelper-retval-fix-2.patch

Sorry, a late comer, as always: http://lkml.org/lkml/2003/9/29/152

Seen it. Tested it. Solved it.

Thanks.

BTW, we cannot find the reason for the synaptics timeouts:

Synaptics driver lost sync at 4th byte
Synaptics driver lost sync at 1st byte
Synaptics driver resynced.
Synaptics driver lost sync at 1st byte
Synaptics driver lost sync at 1st byte
Synaptics driver lost sync at 1st byte
Synaptics driver lost sync at 1st byte
Synaptics driver lost sync at 1st byte
Synaptics driver resynced.

which are the only glitches I find to it.


--
ricardo galli GPG id C8114D34
http://mnm.uib.es/~gallir/

2003-09-29 22:21:53

by Peter Osterlund

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Subject: Re: 2.6.0-test6-mm1: too many defunct event threads

Ricardo Galli <[email protected]> writes:

> BTW, we cannot find the reason for the synaptics timeouts:
>
> Synaptics driver lost sync at 4th byte
> Synaptics driver lost sync at 1st byte
> Synaptics driver resynced.
> Synaptics driver lost sync at 1st byte
> Synaptics driver lost sync at 1st byte
> Synaptics driver lost sync at 1st byte
> Synaptics driver lost sync at 1st byte
> Synaptics driver lost sync at 1st byte
> Synaptics driver resynced.
>
> which are the only glitches I find to it.

Did you try to modify the driver to use low packet rate reporting, ie
40 packets/s instead of 80?

--
Peter Osterlund - [email protected]
http://w1.894.telia.com/~u89404340

2003-09-29 23:01:13

by Ricardo Galli

[permalink] [raw]
Subject: Re: 2.6.0-test6-mm1: too many defunct event threads

On Tuesday 30 September 2003 00:21, Peter Osterlund shaped the electrons
to shout:
> > Synaptics driver lost sync at 1st byte
> > Synaptics driver resynced.
> >
> > which are the only glitches I find to it.
>
> Did you try to modify the driver to use low packet rate reporting, ie
> 40 packets/s instead of 80?

Just tested, the same errors.

Also confirmed that was configured to low rate by checking the interrupts
rate, exactly half as before (220 vs 440 ints. per second).

So...?

minime:~# cat /proc/interrupts
CPU0
0: 310917 XT-PIC timer
1: 149 XT-PIC i8042
2: 0 XT-PIC cascade
8: 4 XT-PIC rtc
10: 2938 XT-PIC yenta, yenta, uhci-hcd, Intel
82801CA-ICH3, orinoco_cs
11: 2 XT-PIC ohci1394, uhci-hcd, uhci-hcd
12: 9314 XT-PIC i8042
14: 5519 XT-PIC ide0
NMI: 0
ERR: 0



--
ricardo galli GPG id C8114D34
http://mnm.uib.es/~gallir/