cvs commit: src/sys/dev/em if_em.c
glebius at FreeBSD.org
Tue Aug 22 15:23:41 UTC 2006
On Tue, Aug 22, 2006 at 02:32:48AM +0000, Pyun YongHyeon wrote:
P> yongari 2006-08-22 02:32:48 UTC
P> FreeBSD src repository
P> Modified files:
P> sys/dev/em if_em.c
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> This should fix occasional watchdog timeout errors seen on a few
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.
Totus tuus, Glebius.
More information about the cvs-src