svn commit: r195960 - in head/sys/dev/usb: . controller input

Navdeep Parhar nparhar at
Sat Aug 1 05:00:58 UTC 2009

On Fri, Jul 31, 2009 at 08:58:47PM -0600, Scott Long wrote:
> Dmitry Marakasov wrote:
> >* Navdeep Parhar (nparhar at wrote:
> >
> >>This has slowed down core dumps very significantly.  What used to take 10-15s on
> >>my system now takes around 3 minutes.
> >
> >Same here.
> >
> Likely because prior to polling being implemented, each i/o was done
> blindly and completed immediately instead of waiting for actual
> confirmation from the hardware.  Crashdumps have been slow for a
> number of years, thanks to a fundamental change in how they are done.
> Until now, USB was cheating and making them look fast.

I'm afraid I did not understand your email.  I was talking about
crashdump time differences between yesterday and the day before, not
"over a number of years."  Are there any other issues involved here?


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