Hi, I use ATA pass through via sg ioctl interface for data read/write. Linux 2.6.18-rc2 with Jeff Garzik's git libata patch was used. Hardware is ARM IOP80321 with PCI-X. Host adapters: sata Sil3124 and pata Sil680. Physical RAM on the target is 64MB. The following problem was observed occasionally: the test program uses 99% of cpu and other programs slowed down dramatically: telnet session was very slow to respond, ip connection was almost time out... It seems the slowness was related to the dmesg traces below (just an observation which may not be true). Has anyone seen similar problem before? Is there any place or hot spot I should look closely? Thanks, Fajun --------- ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata1: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata1: (irq_stat 0x01100010, PHY RDY changed) ata1: waiting for device to spin up (8 secs) ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata1: soft resetting port ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata1.00: configured for UDMA/100 ata1: EH complete SCSI device sda: 1465149168 512-byte hdwr sectors (750156 MB) sda: Write Protect is off sda: Mode Sense: 00 3a 00 00 SCSI device sda: drive cache: write back ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0xd0000 action 0x2 frozen ata2: (irq_stat 0x01900090, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0xd0000 action 0x2 frozen ata2: (irq_stat 0x01900090, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata1: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata1: (irq_stat 0x01100010, PHY RDY changed) ata1: waiting for device to spin up (8 secs) ata1: soft resetting port ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata1.00: configured for UDMA/100 ata1: EH complete SCSI device sda: 1465149168 512-byte hdwr sectors (750156 MB) sda: Write Protect is off sda: Mode Sense: 00 3a 00 00 SCSI device sda: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x40d0000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: waiting for device to spin up (8 secs) ata2: soft resetting port ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/100 ata2: EH complete SCSI device sdb: 1465149168 512-byte hdwr sectors (750156 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back ata2: exception Emask 0x10 SAct 0x0 SErr 0x80000 action 0x2 frozen ata2: (irq_stat 0x01100010, PHY RDY changed) ata2: soft resetting port ata2: SATA link down (SStatus 0 SControl 300) ata2: failed to recover some devices, retrying in 5 secs ata1: exception Emask 0x10 SAct 0x0 SErr 0x80000 action 0x2 frozen ata1: (irq_stat 0x01100010, PHY RDY changed) ata1: soft resetting port ata1: SATA link down (SStatus 0 SControl 300) ata1: failed to recover some devices, retrying in 5 secs ata2: hard resetting port ata2: SATA link down (SStatus 0 SControl 300) ata2: failed to recover some devices, retrying in 5 secs ata1: hard resetting port ata1: SATA link down (SStatus 0 SControl 300) ata1: failed to recover some devices, retrying in 5 secs ata2: hard resetting port ata2: SATA link down (SStatus 0 SControl 300) ata2.00: disabled sd 1:0:0:0: rejecting I/O to offline device ata2: EH complete ata2.00: detaching (SCSI 1:0:0:0) ata1: hard resetting port ata1: SATA link down (SStatus 0 SControl 300) ata1.00: disabled ata1: EH complete ata1.00: detaching (SCSI 0:0:0:0) - 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
