From owner-freebsd-current@FreeBSD.ORG Wed Apr 21 08:00:34 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 31ADE1065672 for ; Wed, 21 Apr 2010 08:00:34 +0000 (UTC) (envelope-from freebsd-current@m.gmane.org) Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by mx1.freebsd.org (Postfix) with ESMTP id B0F1B8FC19 for ; Wed, 21 Apr 2010 08:00:33 +0000 (UTC) Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1O4UrH-0002q4-He for freebsd-current@freebsd.org; Wed, 21 Apr 2010 10:00:31 +0200 Received: from k.saper.info ([91.121.151.35]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 21 Apr 2010 10:00:31 +0200 Received: from saper by k.saper.info with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 21 Apr 2010 10:00:31 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-current@freebsd.org connect(): No such file or directory From: Marcin Cieslak Date: Wed, 21 Apr 2010 08:00:22 +0000 (UTC) Organization: http://saper.info Lines: 66 Message-ID: References: <3bbf2fe11002200946h7480d203naabd7a49fd851f5a@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: k.saper.info User-Agent: slrn/0.9.9p1 (FreeBSD) X-Mailman-Approved-At: Wed, 21 Apr 2010 11:18:41 +0000 Subject: Re: ZFS DEADLKRES - AHCI blocks on ICH7M X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Apr 2010 08:00:34 -0000 Dnia 08.04.2010 Attilio Rao napisał/a: > This may be a false positive. > May you please try the following patch and report if you can fix it > does fix it or not?: > http://www.freebsd.org/~attilio/Sandvine/deadlkres/deadlkres-blessed.diff Thanks for your help. I have applied this patch and I am still getting the deadlock (today it was after 1802544 ticks). But there is more: I am running r203753 on one of those "AHCI disabled by default" laptops (Sony VGN-SZ5MN/B). I have reset the BIOS completely (by removing the CMOS battery for a moment) and it seemingly fixed the problem. I have tested this and I found out: - in ATA emulation mode things are fine. /etc/periodic/daily completes normally. - in AHCI mode /etc/periodic/daily hangs on any disk operation even dumping core is impossible from the ddb(4). I have re-enabled AHCI again and tested with your patch: /etc/periodic/daily and svnsync running in parallel hanged after some longer time and deadlkres kicked in. I presume deadlkres is properly detecting threads that hanged waiting for the disk response. This laptop has the ICH7M controller (in ATA emulation mode): atapci0: port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x1810-0x181f at device 31.1 on pci0 ata0: on atapci0 ata0: [ITHREAD] atapci1: port 0x18d0-0x18d7,0x18c4-0x18c7,0x18c8-0x18cf,0x18c0-0x18c3,0x18b0-0x18bf mem 0xf8644400-0xf86447ff irq 22 at device 31.2 on pci0 atapci1: [ITHREAD] ata2: on atapci1 ata2: [ITHREAD] ata3: on atapci1 ata3: [ITHREAD] in AHCI mode it says: atapci0: port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x1810-0x181f at device 31.1 on pci0 ata0: on atapci0 ata0: [ITHREAD] ahci0: port 0x18d0-0x18d7,0x18c4-0x18c7,0x18c8-0x18cf,0x18c0-0x18c3,0x18b0-0x18bf mem 0xf8644400-0xf86447ff irq 22 at device 31.2 on pci0 ahci0: [ITHREAD] ahci0: AHCI v1.10 with 4 1.5Gbps ports, Port Multiplier not supported ahcich0: at channel 0 on ahci0 ahcich0: [ITHREAD] ahcich1: at channel 2 on ahci0 ahcich1: [ITHREAD] I am using this in the kernel config: device ata device atadisk # ATA disk drives device ataraid # ATA RAID drives device atapicd # ATAPI CDROM drives device atapifd # ATAPI floppy drives device atapist # ATAPI tape drives options ATA_STATIC_ID # Static device numbering device ahci -- << Marcin Cieslak // saper@saper.info >>