Hello Christoph, to be clear : my JMicron pcie card JMB363/368 has 2 sata ports and one IDE port, JMicron supports AHCI on these 2 sata ports, my gigabyte motherboard has 4 sata ports and one IDE port, my gigabyte motherboard doesn't support AHCI on these 4 sata ports ( my bios seems to treats sata devices like IDE devices, a kind of "IDE emulation mode" ), the bug doesn't occur if the Sata DVD burner is not mixed with a hard disk on the Sata ports ( motherboard sata ports ), the configuration who triggers the bug is mixing a slow device ( sata dvd burner ) with a fast device ( sata harddisk ) on the sata ports of the motherboard ( who doesn't support AHCI ), the bug doesn't occur if the sata dvd burner is connected on a JMicron pcie card because there is no other sata harddisks connected on this JMicron, I connect only a IDE hardidsk on this JMicron pcie card and also this Sata dvd burner in order to avoid the bug ( it's a workaround ), 2 pata_jmicron = the IDE port in this JMicron pcie card ( master and slave ) 4 ata_piix = 4 sata ports from the gigabyte motherboard, this ports doesn't support AHCI 2 ahci = 2 sata ports in this JMicron pcie card but another user has the same problem but with an IDE DVD burner ( mixed with an IDE hardidsk ) : https://bugzilla.kernel.org/show_bug.cgi?id=87581#c18 this user has tested your patch and it solves the bug Le 24/11/2014 10:18, Christoph Hellwig a écrit : > On Thu, Nov 20, 2014 at 07:27:49PM +0100, Barto wrote: >> but the sata DVD burner is now connected on a Jmicron sata PCIe card ( >> with this configuration the bug doesn't occur ), I don't know if this >> change can modify the result of your command, >> >> here is the result of another command : >> >> $ for i in /sys/class/scsi_host/*; do cat $i/proc_name; done >> pata_jmicron >> pata_jmicron >> ata_piix >> ata_piix >> ata_piix >> ata_piix >> ahci >> ahci > > Interesting. So the jmicron card also has a queue depth of just one, > but the error still occurs? I've added the linux-ide list, maybe > someone there has an idea how piix vs jmicron could have such different > behaviors for queueing or error handling. > > -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
