From: stephen mulcahy <smulcahy@gmail.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>,
netdev <netdev@vger.kernel.org>,
Ben Hutchings <ben@decadent.org.uk>,
Ayaz Abdulla <aabdulla@nvidia.com>,
572201@bugs.debian.org
Subject: Re: forcedeth driver hangs under heavy load
Date: Tue, 13 Apr 2010 15:49:04 +0100 [thread overview]
Message-ID: <4BC48460.4040001@gmail.com> (raw)
In-Reply-To: <1271169741.16881.437.camel@edumazet-laptop>
Eric Dumazet wrote:
> Le mardi 13 avril 2010 à 15:27 +0100, stephen mulcahy a écrit :
>> Ok, I've tried both of the following with my reproducer
>>
>> 1. ethtool -K eth0 tso off
>>
>> RESULT: reproducer causes multiple hosts to be come unresponsive on
>> first run.
>>
>> 2. ethtool -K eth0 tx off
>>
>> RESULT: reproducer runs three times without any hosts becoming unresponsive.
>>
>> -stephen
>
> Thanks Stephen !
>
> Now some brave fouls to check the 6410 lines of this driver ? ;)
>
> Question of the day : Why TSO is broken in forcedeth ?
> Is it generically broken or is it broken for specific NICS ?
>
Actually, it is only when tx-checksumming is turned off that the problem
doesn't occur (so I'm not sure TSO is the problem).
Additionally, a google also turns up this existing Debian bug
http://bugs.debian.org/506419 which seems to be related.
-stephen
next prev parent reply other threads:[~2010-04-13 14:49 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4B9E6C60.7030300@atlanticlinux.ie>
[not found] ` <20100315182220.GQ2763@decadent.org.uk>
[not found] ` <4B9F5E5E.2060209@atlanticlinux.ie>
[not found] ` <1270393967.8341.11.camel@localhost>
[not found] ` <4BBCA19C.5080204@atlanticlinux.ie>
2010-04-10 23:36 ` forcedeth driver hangs under heavy load Ben Hutchings
2010-04-12 10:01 ` Bug#572201: " stephen mulcahy
2010-04-12 12:39 ` stephen mulcahy
2010-04-12 12:47 ` Eric Dumazet
2010-04-12 13:05 ` stephen mulcahy
2010-04-12 13:19 ` stephen mulcahy
2010-04-12 15:24 ` Eric Dumazet
2010-04-12 16:11 ` stephen mulcahy
2010-04-12 16:59 ` Eric Dumazet
2010-04-13 10:03 ` stephen mulcahy
2010-04-13 10:49 ` Eric Dumazet
2010-04-13 11:00 ` stephen mulcahy
2010-04-13 12:04 ` Ben Hutchings
2010-04-13 14:27 ` stephen mulcahy
2010-04-13 14:42 ` Eric Dumazet
2010-04-13 14:49 ` stephen mulcahy [this message]
2010-04-13 15:00 ` stephen mulcahy
2010-04-13 15:05 ` Eric Dumazet
2010-04-13 15:08 ` stephen mulcahy
2010-04-13 15:22 ` Eric Dumazet
2010-04-13 15:25 ` stephen mulcahy
2010-04-13 20:01 ` Eric Dumazet
2010-04-13 21:43 ` David Miller
2010-04-13 21:46 ` Eric Dumazet
2010-04-14 5:33 ` Bug#572201: " Ayaz Abdulla
2010-04-14 1:41 ` David Miller
2010-04-14 14:30 ` stephen mulcahy
2010-04-14 5:31 ` Bug#572201: [PATCH] forcedeth: fix tx limit2 flag check Ayaz Abdulla
2010-04-14 10:14 ` stephen mulcahy
2010-04-13 17:22 forcedeth driver hangs under heavy load Xose Vazquez Perez
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