From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4CD090F8.7040909@domain.hid> Date: Tue, 02 Nov 2010 23:30:16 +0100 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <4CC20AD2.4060501@domain.hid> <4CC665AC.5030802@domain.hid> <4CD00450.6020100@domain.hid> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] Slow hard drive access in xenomai List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Pastor Cc: xenomai@xenomai.org Peter Pastor wrote: > Hey Gilles, > > I do understand the intention of why I should disable either of the two (usb > controller and SATA drives), however, what I meant is, I need both > "permanently". If I disable all the usb ports, then I only have access over > ethernet (ssh), since the keyboard is attached to the computer through usb > (there are no other options). Also, to the best of my knowledge, disabling > means disabling them in the BIOS, correct? If so, I do not see how I could > enable the usb controller again... Are there other ways to do that. If not, > please let me know how to do it. The other option, disabling the SATA drives > does not make sense either, since I need them to boot the kernel, do I ? I was talking about the Intel HDA driver and the "ioc" driver. Since you have another disk controller (ahci), you may probably boot on it for the sake of testing. > > Anyway, I added the kernel parameter "irqpooll" as suggested by the error > msg in the kernel log... and since then I haven't seen the problem occurring > again. The documentation says that I will loose some performance and I am > wondering how much that is. However, I am willing to debug this further and > to remove the irqpoll option again. But if you are satisfied with irqpoll, why bother? -- Gilles.