Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751080AbWLNT6O (ORCPT ); Thu, 14 Dec 2006 14:58:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932509AbWLNT6O (ORCPT ); Thu, 14 Dec 2006 14:58:14 -0500 Received: from smtp.osdl.org ([65.172.181.25]:52709 "EHLO smtp.osdl.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751080AbWLNT6N (ORCPT ); Thu, 14 Dec 2006 14:58:13 -0500 Date: Thu, 14 Dec 2006 11:57:14 -0800 (PST) From: Linus Torvalds To: Alistair John Strachan cc: Linux Kernel Mailing List , Jeff Garzik , Jens Axboe Subject: Re: Linux 2.6.20-rc1 In-Reply-To: <200612141930.19797.s0348365@sms.ed.ac.uk> Message-ID: References: <200612141930.19797.s0348365@sms.ed.ac.uk> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1654 Lines: 39 On Thu, 14 Dec 2006, Alistair John Strachan wrote: > > `hddtemp' has stopped working on 2.6.20-rc1: Hmm. Can you do the strace on a working kernel too? For example, is it that the 0x30d ioctl (which is HDIO_GET_IDENTITY) used to work? If it's a SATA device, and you _used_ to use the PATA drivers, some of the old IDE-only ioctl's simply don't work when used in native SATA configurations. [ Side note: I consider that to be a mis-feature, but it's not a new regression, it's always been that way: different block subsystems have had their own "private" ioctl spaces. We've been moving more and more towards a unified space, and we could probably make scsi_ioctl.c emulate at least _some_ of the HDIO_xxx calls too, and try to support all the block ioctl's on all block devices rather than have some that work only on some certain class of hardware. But we're not there yet, and in the meantime it will actually make a difference whether you use your disks through the kernel SCSI layer (SATA and /dev/sdX) or through the IDE layer (IDE and /dev/hdX) ] On the other hand, this _sounds_ very much like a bug that should have been fixed before 2.6.20-rc1, which affected SG_IO. If you can do a "git bisect" on this, that would help a lot. (Btw, where is "hddtemp" from, anyway? Doesn't seem to be part of the standard set of tools I have on any of my systems) Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/