From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Dionne Subject: Re: Hang during boot, bisected to commit 96d60303fd Date: Wed, 2 Jun 2010 22:11:09 -0400 Message-ID: References: <20100603020006.GB19123@srcf.ucam.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-ew0-f223.google.com ([209.85.219.223]:35401 "EHLO mail-ew0-f223.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933518Ab0FCCLL convert rfc822-to-8bit (ORCPT ); Wed, 2 Jun 2010 22:11:11 -0400 In-Reply-To: <20100603020006.GB19123@srcf.ucam.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Matthew Garrett Cc: Linux Kernel Mailing List , linux-ide@vger.kernel.org, garzik@redhat.com On Wed, Jun 2, 2010 at 10:00 PM, Matthew Garrett = wrote: > On Wed, Jun 02, 2010 at 09:49:27PM -0400, Marc Dionne wrote: >> =A0 =A0Since somewhere early in the 2.6.35 merge window I've been se= eing a hang >> =A0 =A0during boot. =A0The hang last roughly 30 seconds and is follo= wed by this: >> >> =A0 =A0ata4.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x6 fro= zen >> =A0 =A0ata4.00: failed command: READ FPDMA QUEUED >> =A0 =A0ata4.00: cmd 60/08:00:00:00:00/00:00:00:00:00/40 tag 0 ncq 40= 96 in >> =A0 =A0 =A0 =A0 =A0 =A0 res 40/00:00:00:00:00/00:00:00:00:00/00 Emas= k 0x4 (timeout) >> =A0 =A0ata4.00: status: { DRDY } >> =A0 =A0ata4: hard resetting link >> =A0 =A0ahci_is_device_present: status is: 80 >> =A0 =A0ahci_is_device_present: status(2) is: 3 >> =A0 =A0ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300) >> =A0 =A0ata4.00: configured for UDMA/133 >> =A0 =A0ata4.00: device reported invalid CHS sector 0 >> =A0 =A0ata4: EH complete >> >> =A0 =A0The system works normally once booted. =A0I had some time to = do a bisect >> =A0 =A0today and it cleanly ended up pointing to this commit: >> =A0 =A0 =A0 =A096d60303fd: ahci: Turn off DMA engines when there's n= o device attached >> >> =A0 =A0Reverting the commit makes the system boot cleanly as before.= =A0System has >> =A0 =A0an Intel ICH10 based board, in AHCI mode, disk is an Intel X2= 5M SSD. > > Hm, interesting. Jeff, any immediate ideas? I don't see this behaviou= r > on my ICH10. Is there actually a device on ata4? > > -- > Matthew Garrett | mjg59@srcf.ucam.org Yes, ata4 is the Intel SSD: ata4.00: ATA-7: INTEL SSDSA2MH080G1GC, 045C8610, max UDMA/133 Marc