From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Prashant Bhole <prashantsmailcenter@gmail.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: ibm_newemac tx problem with jumbo frame enabled
Date: Thu, 08 Dec 2011 09:03:03 +1100 [thread overview]
Message-ID: <1323295383.12793.3.camel@pasglop> (raw)
In-Reply-To: <CAD6p20chCnh+PN5ekPz20BJQMdTaisb5toLA9rySaYJTeivRfQ@mail.gmail.com>
On Wed, 2011-12-07 at 13:35 +0530, Prashant Bhole wrote:
> Still couldn't find anything like fifo overflow...
> I noticed one more thing, this problem happens only when mtu size on
> the initiator (the other end) is set to 4088, regardless of any mtu
> size set for EMAC.
Did you check all the registers that may carry errors ? Nothing showed
up ? Did you check that things like Pause frames were properly
negociated on both sides ? Tried playing with the pause and FIFO
thresholds ?
Other than using the tx timeout to perform resets I don't see a good way
to fix that problem.
Cheers,
Ben.
next prev parent reply other threads:[~2011-12-07 22:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-18 5:03 ibm_newemac tx problem with jumbo frame enabled Prashant Bhole
2011-11-25 5:25 ` Benjamin Herrenschmidt
2011-12-07 8:05 ` Prashant Bhole
2011-12-07 22:03 ` Benjamin Herrenschmidt [this message]
2011-12-08 13:01 ` Prashant Bhole
2011-12-08 22:59 ` Benjamin Herrenschmidt
2011-12-08 23:11 ` Tirumala Marri
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