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Keith Owens (on Tue, 25 Jul 2006 16:27:34 +1000) wrote: >Jeff Garzik (on Tue, 25 Jul 2006 01:57:08 -0400) wrote: >>Keith Owens wrote: >>> Keith Owens (on Fri, 21 Jul 2006 16:18:47 +1000) wrote: >>>> I am seeing an intermittent failures to detect sata disks on >>>> 2.6.18-rc2. Dell SC1425, PIIX chipset, gcc 4.1.0 (opensuse 10.1). >>>> Sometimes it will detect both disks, sometimes only one, sometimes none >>>> at all. AFAICT it only occurs after a soft reboot, and possibly only >>>> after an emergency reboot. Alas the problem is so intermittent that it >>>> is hard to tell what conditions will trigger it. >>> >>> I applied the debug patch below, turn on prink timing and set >>> initdefault to 6 so the machine was in a continual soft reboot cycle. >>> After multiple cycles I got this trace. piix_sata_prereset() reads a >>> zero config byte for almost 15 seconds then it changes to 0x11, >>> followed by a hang. Why is the config byte initially zero, and what >>> makes it change? The normal value for pcs is 0x33. >> >>Can you try 2.6.18-rc2-git3? >> >> Jeff > >Running now, with the trivial bug fix below plus my debug patch. I >will leave it running overnight, this problem is very intermittent. Failed again on 2.6.18-rc2-git3. 80+ seconds of this before I killed the power. No sign of it getting any data from the sata PCI config. [ 8.689136] piix_sata_prereset: ata1: ENTER, pcs=0x0 base=0 [ 8.755861] piix_sata_prereset: ata1: LEAVE, pcs=0x0 present=0x0 [ 8.827741] piix_sata_prereset: ata1: ENTER, pcs=0x0 base=0 [ 8.894446] piix_sata_prereset: ata1: LEAVE, pcs=0x0 present=0x0 - 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/ | |||||||||
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