Date: Fri, 10 Aug 2012 09:52:38 -0400 From: Mike Tancsa <mike@sentex.net> To: John Baldwin <jhb@freebsd.org> Cc: Garrett Cooper <yanegomi@gmail.com>, current@freebsd.org Subject: Re: [PATCH] Add locking to twe(4) so it no longer uses Giant Message-ID: <50251226.8020805@sentex.net> In-Reply-To: <50250D48.6020101@FreeBSD.org> References: <201208031418.57941.jhb@freebsd.org> <201208031726.03652.jhb@freebsd.org> <502121F5.4020705@sentex.net> <201208080727.45595.jhb@freebsd.org> <5022B252.30606@sentex.net> <5023AB9D.5070608@sentex.net> <5023B824.40405@FreeBSD.org> <5023C9A6.9070502@sentex.net> <5023F199.1090201@FreeBSD.org> <50240F5F.6000702@sentex.net> <502425C0.5070303@sentex.net> <50250D48.6020101@FreeBSD.org>
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On 8/10/2012 9:31 AM, John Baldwin wrote:
> On 8/9/12 5:04 PM, Mike Tancsa wrote:
>> Start up the tw_cli client
>>
>> 0{offsite2}# tw_cli
>> //offsite2> show
>>
>> Ctl Model (V)Ports Drives Units NotOpt RRate VRate BBU
>> ------------------------------------------------------------------------
>> c0 9650SE-2LP 2 2 1 0 1 1 -
>>
>>
>> //offsite2> exit
>> 0{offsite2}# ls -l /dev/tw*
>> crw------- 1 root operator - 0, 37 Aug 9 16:58 /dev/twa0
>> crw-r----- 1 root operator - 0, 174 Aug 9 17:00 /dev/twed0
>> 0{offsite2}#
>>
>>
>> It then disappears ?!
>
> Bizarre, it seems to disappear while tw_cli is running? I'm curious if
> 'rm -W /dev/twe0' brings it back?
nada
0{offsite2}# rm -W /dev/twe0
rm: /dev/twe0: No such file or directory
1{offsite2}# rm -W /dev/twe0
rm: /dev/twe0: No such file or directory
1{offsite2}# ls -l /dev/twe*
crw-r----- 1 root operator - 0, 174 Aug 9 17:00 /dev/twed0
0{offsite2}#
>
> If so, it might be interesting to see a ktrace of tw_cli.
>
I just ran ktrace tw_cli
File is available at
http://www.tancsa.com/misc/ktrace.out
and
http://www.tancsa.com/misc/ktrace.txt
---Mike
--
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada http://www.tancsa.com/
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