Date: Fri, 31 Jul 2009 20:58:47 -0600 From: Scott Long <scottl@samsco.org> To: Dmitry Marakasov <amdmi3@amdmi3.ru> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, Alfred Perlstein <alfred@FreeBSD.org>, Navdeep Parhar <nparhar@gmail.com>, src-committers@FreeBSD.org Subject: Re: svn commit: r195960 - in head/sys/dev/usb: . controller input Message-ID: <4A73AF67.3010508@samsco.org> In-Reply-To: <20090801022914.GB93222@hades.panopticon> References: <200907300014.n6U0EZ77086341@svn.freebsd.org> <d04e16b70907310045y635245efob33b10464c22524f@mail.gmail.com> <20090801022914.GB93222@hades.panopticon>
next in thread | previous in thread | raw e-mail | index | archive | help
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. Scott
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4A73AF67.3010508>