On 08/22/06 10:23, Gleb Smirnoff wrote:
On Tue, Aug 22, 2006 at 02:32:48AM +0000, Pyun YongHyeon wrote:
P> yongari 2006-08-22 02:32:48 UTC
P>
P> FreeBSD src repository
P>
P> Modified files:
P> sys/dev/em if_em.c
P> Log:
P> It seems that em(4) misses Tx completion interrupts under certain
P> conditions. The cause of missing Tx completion interrupts comes from
P> Tx interrupt moderation mechanism(delayed interrupts) or chipset bug.
P> If Tx interrupt moderation mechanism is the cause of false watchdog
P> timeout error we should have to fix all device drivers that have Tx
P> interrupt moderation capability. We may need more investigation
P> for this issue. Anyway, the fix is the same for both cases.
P>
P> This should fix occasional watchdog timeout errors seen on a few
P> systems.
P>
P> Reported by: -net, Patrick M. Hausen < hausen AT punkt DOT de >
P> Tested by: Patrick M. Hausen < hausen AT punkt DOT de >
This look like a workaround, not a fix the root of the problem. Several
people on net said that this problem disappears if debug.mpsafenet=0.
So I think there is a problem in FreeBSD or driver, not in chip.
And it also worked perfectly for a very very long time until 6.x tree.
I went from 5-STABLE to 6-STABLE and started seeing it a lot ( a few
times per day) on a couple servers.
Eric
--
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Eric Anderson Sr. Systems Administrator Centaur Technology
Anything that works is better than anything that doesn't.
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