Date: Wed, 01 Sep 2004 21:58:17 +0200 From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk> To: Nate Lawson <nate@root.org> Cc: current@freebsd.org Subject: Re: ATA DVD playback hanging in physrd Message-ID: <413629D9.6090606@DeepCore.dk> In-Reply-To: <41362174.7030900@root.org> References: <20040716231556.7D2225D08@ptavv.es.net> <41362174.7030900@root.org>
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Nate Lawson wrote: > Kevin Oberman wrote: >=20 >>> Date: Fri, 16 Jul 2004 15:50:03 -0700 >>> From: Nate Lawson <nate@root.org> >>> Sender: owner-freebsd-current@freebsd.org >> >> >>> While playing back a DVD on my Thinkpad, it hangs at some point (2-5 >>> minutes after beginning playback). The player is hung in "physrd" an= d >>> the drive stops spinning. This hang happens when the drive is in PIO= 4 >>> or DMA mode. >>> >>> However, starting another process (i.e. cat /dev/acd0) spins up the >>> drive and it works (and the other process begins running again). >>> What's interesting is that I can quickly trigger this hang by startin= g >>> IO on a completely different channel (i.e. dd if=3D/dev/ad0 of=3D/dev= /null >>> bs=3D1m). This indicates that it may be a driver issue since the DVD= >>> drive that hangs is on a different channel and irq than the hard >>> drive. >>> >>> Devices: >>> atapci0: <Intel ICH3 UDMA100 controller> port >>> 0x1860-0x186f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on p= ci0 >>> ata0: at 0x1f0 irq 14 on atapci0 >>> ata1: at 0x170 irq 15 on atapci0 >>> [...] >>> ad0: 19077MB <IC25N020ATMR04-0> [41344/15/63] at ata0-master UDMA100 >>> ata1-master: FAILURE - ATAPI_RESET no interrupt >>> acd0: DVDROM <MATSHITADVD-ROM SR-8175> at ata1-master PIO4 >>> >>> The same behavior also happens on my DVD/CDRW drive. >>> ata1-slave: FAILURE - ATAPI_IDENTIFY no interrupt >>> ata1-slave: FAILURE - ATAPI_IDENTIFY no interrupt >>> ata1-master: FAILURE - ATAPI_RESET no interrupt >>> acd0: CDRW <UJDA720 DVD/CDRW> at ata1-master PIO4 >> >> >> I have been seeing the same thing on my ThinkPad for a couple of >> weeks. It may have been there for longer as I had not heavily used the= >> DVD for a while. There have been similar reports from others, but this= >> is the most exact match to what I have been seeing. Mine is a Toshiba >> DVD/CDRW (DW-28E) at ata1-master UDMA33. >=20 > I don't know if others reported back on this yet, but the problem is=20 > fixed. I believe Soeren's race fix was the key. Yes, this was the race that could get a request lost.. > Thanks! NP! -S=F8ren
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