Date: Thu, 17 Mar 2011 01:49:36 +0200 From: Alexander Motin <mav@FreeBSD.org> To: Bob Willcox <bob@immure.com> Cc: svn-src-stable@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, svn-src-stable-8@freebsd.org Subject: Re: svn commit: r218347 - stable/8/sys/dev/ata/chipsets Message-ID: <4D814C90.5090304@FreeBSD.org> In-Reply-To: <4D814AAA.3070801@FreeBSD.org> References: <201102052134.p15LYRmw041695@svn.freebsd.org> <20110316135122.GB7185@rancor.immure.com> <4D814AAA.3070801@FreeBSD.org>
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On 17.03.2011 01:41, Alexander Motin wrote: > On 16.03.2011 15:51, Bob Willcox wrote: >> This change has broken SATA disk support on my Intel Atom D525 ITX >> system. By >> reverting this change 8.2-STABLE works again on this system. >> >> My 'uname -a' output is: >> >> FreeBSD maul.immure.com 8.2-STABLE FreeBSD 8.2-STABLE #6: Wed Mar 16 >> 08:15:43 CDT 2011 bob@maul.immure.com:/usr/obj/usr/src/sys/MAUL amd64 >> >> When booting the system I get tons of these messages: >> >> Mar 16 07:38:19 maul kernel: ad4: WARNING - SETFEATURES ENABLE RCACHE >> requeued due to channel reset >> Mar 16 07:38:19 maul kernel: ad4: interrupt on idle channel ignored > > As I can see, it means that channel has some active request, but it is > in IDLE state. It is strange, but I won't be surprised much if it is the > result of some locking problem in ata(4) in non-CAM mode. > >> repeated over and over, and then lots of these: >> >> Mar 16 07:38:21 maul kernel: ad4: WARNING - READ_DMA48 requeued due to >> channel reset LBA=617964479 >> Mar 16 07:38:21 maul kernel: ata2: FAILURE - already active DMA on >> this device >> Mar 16 07:38:21 maul kernel: ata2: setting up DMA failed >> >> for different LBA values. >> >> As one might expect, I then start seeing I/O errors on the disk and >> programs >> failing >> >> I've attached the 'pciconf -lv' output. > > Send me please full verbose log, if you can save it. I am especially > interested in place around first errors. > > You may try to build kernel with `options ATA_CAM` to see if it helps. > I've mostly tested this patch in that mode. PS: I think commenting "ch->flags |= ATA_PERIODIC_POLL;" lines in ata-intel.c should effectively neutralize this change and probably hide the problem back. As last resort. >> On Sat, Feb 05, 2011 at 09:34:27PM +0000, Alexander Motin wrote: >>> Author: mav >>> Date: Sat Feb 5 21:34:26 2011 >>> New Revision: 218347 >>> URL: http://svn.freebsd.org/changeset/base/218347 >>> >>> Log: >>> MFC r217774: >>> ICH7 SATA controller in legacy mode can provide access to SATA registers >>> via AHCI-like memory resource at BAR(5). Use it if BIOS was so kind to >>> allocate memory for that BAR. This allows hot-plug support and >>> connection >>> speed reporting. -- Alexander Motin
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