From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out.tiscali.be (spoolo2.tiscali.be [62.235.13.211]) by dsl2.external.hp.com (Postfix) with ESMTP id 5C75D4854 for ; Sun, 22 Feb 2004 10:54:16 -0700 (MST) Message-ID: <4038ECEF.7020606@tiscali.be> Date: Sun, 22 Feb 2004 17:54:55 +0000 From: Joel Soete MIME-Version: 1.0 To: Riccardo Subject: Re: [parisc-linux] Hanging with kernels >= 2.4.22 References: <20040218235225.GA1623@calypso> <20040219062907.GC13916@colo.lackof.org> <20040221075849.GA1642@calypso> <20040221170508.GB14198@baldric.uwo.ca> <4038C0B0.F7D1708A@tiscalinet.it> <4038CB15.5060507@tiscali.be> <4038E400.427F0528@tiscalinet.it> In-Reply-To: <4038E400.427F0528@tiscalinet.it> Content-Type: text/plain; charset=us-ascii; format=flowed Cc: parisc-linux@lists.parisc-linux.org List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Ricardo, Riccardo wrote: > pre-scriptum: I am sending this to the list because when trying to send > an email directly to Joel I get his MTA answering I have invalid headers > (tried two times) Sorry my ISP pb certainly, I will try to check with support. Thanks for advise ;) > Joel Soete wrote: > > >>>I would set the tag queue as default to 8 and not to 16, to stay on the >>>safe side. Couldn't it be made configurable from the kernel >>>configuration menu? >>> >> >>Good idea. > > It is not me that can make changes there, but it seems to me that 8 is > reasonable. Agreed (anyway you can always suggest a patch, there are always well come :) ) > Also, a kernel config option would make this parameter > obvious to everybody. I had only a small preformance decrease from 16 to > 8 tags (well, disk IO sucks anyway under linux-pa and my old box). While > 2 is pure sufference :) > > >>And you are sure that scsi id are well different and scsi chain well terminated, I supose. > > Yes, the internal chain is terminated with the original HP terminator > and I removed the disk internal ones. > In fact substituing the original HP disk with another one removed the > problem (strangely enough, with the older IBM drive as a second drive I > had sometimes freezes but this problem did not appear). > > > >>hmm, I leaved the same experience but with two external disks of exactly the same type (same supplier: hp, same manufactor: >>seagate, same product reference) but with a small firmware revision difference. Unfortunately, this pb only occured under linux >>:(. Now the disk is broken again; so no chance to test it with more recent kernel 2.4 or 2.6 :( > > > I used a failry recent kernel for there test, I believe 2.4.23. > > The scsi code doesn't seem to be so stable and performing as compared to > hp-ux.... > Certainly for numerous reason but on the other hand it is not ported (i don't mean portable, i am quiet sure it is) other platform :). Thanks for info, Joel