From: Stephen Hemminger <shemminger@vyatta.com>
To: Bjarke Istrup Pedersen <gurligebis@gentoo.org>
Cc: Ben Hutchings <bhutchings@solarflare.com>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
Roger Luethi <rl@hellgate.ch>
Subject: Re: [PATCH 1/1] via-rhine: Fix hanging with high CPU load on low-end broads.
Date: Wed, 28 Dec 2011 10:17:10 -0800 [thread overview]
Message-ID: <20111228101710.51c4893f@nehalam.linuxnetplumber.net> (raw)
In-Reply-To: <CACPM=kX2hcGt3XXDJkCAcOjv=5oqSHChhhphUAyRhR_PsNFEEQ@mail.gmail.com>
Looks like the hardware isn't really disabling interrupts correctly to support
NAPI. NAPI is supposed to be friendly and under load the work should move to
ksoftirqd. I suspect the IRQ management in this driver is borked.
There is some stupid spin loops in the IRQ handler that happen when looking for
Tx IRQ. I would run with debug set and see if this is triggering.
next prev parent reply other threads:[~2011-12-28 18:17 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-28 12:28 [PATCH 1/1] via-rhine: Fix hanging with high CPU load on low-end broads Bjarke Istrup Pedersen
2011-12-28 14:37 ` Ben Hutchings
2011-12-28 15:14 ` Bjarke Istrup Pedersen
2011-12-28 17:13 ` Ben Hutchings
2011-12-28 17:30 ` Bjarke Istrup Pedersen
2011-12-28 18:17 ` Stephen Hemminger [this message]
2011-12-28 18:34 ` David Miller
2011-12-28 19:16 ` Bjarke Istrup Pedersen
2011-12-29 15:39 ` Francois Romieu
2011-12-29 18:39 ` Francois Romieu
2011-12-29 22:00 ` Bjarke Istrup Pedersen
2011-12-29 22:05 ` David Miller
2011-12-29 23:19 ` Bjarke Istrup Pedersen
2011-12-29 23:37 ` Bjarke Istrup Pedersen
2011-12-29 23:48 ` David Miller
2011-12-30 1:18 ` Bjarke Istrup Pedersen
2011-12-29 23:53 ` Francois Romieu
2011-12-30 1:21 ` Bjarke Istrup Pedersen
2011-12-30 11:48 ` Bjarke Istrup Pedersen
2011-12-30 12:56 ` Francois Romieu
2011-12-30 13:51 ` Bjarke Istrup Pedersen
2011-12-30 18:03 ` Francois Romieu
2011-12-30 18:45 ` Bjarke Istrup Pedersen
2011-12-30 20:38 ` Bjarke Istrup Pedersen
2011-12-30 21:50 ` Francois Romieu
2011-12-30 22:08 ` Bjarke Istrup Pedersen
2011-12-30 22:08 ` Francois Romieu
2011-12-30 22:13 ` Bjarke Istrup Pedersen
2011-12-30 22:19 ` Francois Romieu
2011-12-30 22:41 ` Bjarke Istrup Pedersen
2011-12-31 1:37 ` Bjarke Istrup Pedersen
2011-12-31 12:17 ` Francois Romieu
2012-01-01 12:09 ` Bjarke Istrup Pedersen
2012-01-01 21:15 ` Bjarke Istrup Pedersen
2012-01-03 19:20 ` Bjarke Istrup Pedersen
2012-01-03 22:32 ` Francois Romieu
2012-01-04 7:59 ` Bjarke Istrup Pedersen
2012-01-05 12:01 ` Bjarke Istrup Pedersen
2012-01-05 16:20 ` Francois Romieu
2012-01-05 16:46 ` Bjarke Istrup Pedersen
2012-01-05 17:12 ` David Miller
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