de0 doze off
rwatson at freebsd.org
Fri Sep 17 15:37:12 PDT 2004
On Fri, 17 Sep 2004, Raphael H. Becker wrote:
> > Looks good. This may result in reduced stability, but it may also tell us
> > specifically if there's a problem with the IFF_NEEDSGIANT mechanism.
> two parallel wget saturate the link to an average of ~12MByte/sec
> (netstat 1) for some hours. seems to work perfect now, constant full
> I transferred around 180 copies of the miniinst.iso and ran a md5 on
> lots of the file to detect xfer-errors, nothing failed, no more errors.
So it sounds like there may be a race in the IFF_NEEDSGIANT implementation
-- perhaps a lost task event when queueing occurs while the task is
running. I'll need to come up with a patch that allows us to make sure
this is the case, and get back to you tonight or tomorrow.
Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org Principal Research Scientist, McAfee Research
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