From owner-svn-src-all@FreeBSD.ORG Sat Aug 1 05:00:58 2009 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 03D061065D3D; Sat, 1 Aug 2009 05:00:58 +0000 (UTC) (envelope-from nparhar@gmail.com) Received: from mail-px0-f196.google.com (mail-px0-f196.google.com [209.85.216.196]) by mx1.freebsd.org (Postfix) with ESMTP id 8D51F8FC1C; Sat, 1 Aug 2009 05:00:57 +0000 (UTC) (envelope-from nparhar@gmail.com) Received: by mail-px0-f196.google.com with SMTP id 34so4216111pxi.3 for ; Fri, 31 Jul 2009 22:00:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:date:from:to:cc:subject :message-id:mail-followup-to:references:mime-version:content-type :content-disposition:in-reply-to:user-agent; bh=KaDXAi4rE21oF6Ic6hlL7p9+f46e68RB3kuZh2vRz+A=; b=cyPdAW/kDNsT6cbAmedOWiC+05DWbuFJPqvUAbMi5faQHC+UPQMpZuGUq1SzKvN73L /dXJpz1oL1mu5HMJdsAxg0tpYbnArqtibm/ThOb8txsLJBrlLwObcPoWSE3HPNNqZSiI NPzu0an/Qh72AWIMECTTSBfX+XKtTvnApEdvQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:mail-followup-to:references :mime-version:content-type:content-disposition:in-reply-to :user-agent; b=bSn9DtIGp1pWpcXhQE8TyD+lOErbx47LJ74WAnQz9VT0ak/jzWYsNr8q0Pl91sCTue GWt0iPsN6z/6KLbmxhSd08A63MeF+qT7YGj8wWeGx74JTyBzxt2FnPGP/uds+UGTMc1E w/1SXC2B864VkZS3J6DKvo5LSL3D7j7JczKhc= Received: by 10.115.46.14 with SMTP id y14mr4805461waj.165.1249102857436; Fri, 31 Jul 2009 22:00:57 -0700 (PDT) Received: from doormat.home (c-76-126-210-244.hsd1.ca.comcast.net [76.126.210.244]) by mx.google.com with ESMTPS id m31sm6291966wag.66.2009.07.31.22.00.56 (version=TLSv1/SSLv3 cipher=RC4-MD5); Fri, 31 Jul 2009 22:00:56 -0700 (PDT) Date: Fri, 31 Jul 2009 22:00:53 -0700 From: Navdeep Parhar To: Scott Long Message-ID: <20090801050053.GB8399@doormat.home> Mail-Followup-To: Scott Long , Dmitry Marakasov , Alfred Perlstein , svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org References: <200907300014.n6U0EZ77086341@svn.freebsd.org> <20090801022914.GB93222@hades.panopticon> <4A73AF67.3010508@samsco.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4A73AF67.3010508@samsco.org> User-Agent: Mutt/1.5.20 (2009-06-14) Cc: Alfred Perlstein , svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, Dmitry Marakasov , src-committers@FreeBSD.org Subject: Re: svn commit: r195960 - in head/sys/dev/usb: . controller input X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 01 Aug 2009 05:00:58 -0000 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