Date: Fri, 31 Jul 2009 22:00:53 -0700 From: Navdeep Parhar <nparhar@gmail.com> To: Scott Long <scottl@samsco.org> Cc: Alfred Perlstein <alfred@FreeBSD.org>, svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, Dmitry Marakasov <amdmi3@amdmi3.ru>, src-committers@FreeBSD.org Subject: Re: svn commit: r195960 - in head/sys/dev/usb: . controller input Message-ID: <20090801050053.GB8399@doormat.home> In-Reply-To: <4A73AF67.3010508@samsco.org> References: <200907300014.n6U0EZ77086341@svn.freebsd.org> <d04e16b70907310045y635245efob33b10464c22524f@mail.gmail.com> <20090801022914.GB93222@hades.panopticon> <4A73AF67.3010508@samsco.org>
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On Fri, Jul 31, 2009 at 08:58:47PM -0600, Scott Long wrote: > Dmitry Marakasov wrote: > >* Navdeep Parhar (nparhar@gmail.com) 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? Regards, Navdeep
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