Alan wrote: >> However, i'm not still sure i enabled as much debugging info as i >> could in the kernel configuration. If you need more, please point me >> to precise configuration options. > > You grabbed a lot of junk but you did grab this line > > [17179682.560000] Synchronizing SCSI cache for disk sda: > > Which means sd_sync_cache got called and flushed the data to disk. > > I don't think you can do the other needed debugging without a recompile. > > The following will generate a vast amount of debug of which only the end > matters. You may well want to build a kernel this way, boot it with > init=/bin/sh and then at the shell prompt do "halt -f" so you don't get > too much debug > > In include/linux/libata.h change > > #undef ATA_DEBUG /* debugging output */ > #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ > > so both of the undef-s read define > > #define ATA_DEBUG > #define ATA_VERBOSE_DEBUG > > and recompile I hear the same strange noise on poweroff (2.6.20 vanilla). This is what I get on my system with ATA_DEBUG and ATA_VERBOSE_DEBUG both defined. The system will *not* poweroff with "halt -f" so there was no noise!
md: stopping all md devices. Synchronizing SCSI cache for disk sda: ata_scsi_dump_cdb: CDB (1:0,0,0) 35 00 00 00 00 00 00 00 00 ata_scsi_translate: ENTER ata1: ata_dev_select: ENTER, ata1: device 0, wait 1 ata_tf_load_pio: device 0xA0 ata_exec_command_pio: ata1: cmd 0xE7 ata_scsi_translate: EXIT ata_host_intr: ata1: protocol 1 task_state 2 ata_hsm_move: ata1: protocol 1 task_state 2 (dev_stat 0x50) ata_hsm_move: ata1: dev 0 command complete, drv_stat 0x50 System halted. If I do a sysrq-o right after this, the above message repeate once more and the system turns off w/o the disturbing noise. For the next messages, I booted the system completely (no init=/bin/sh) and did a "poweroff" at the console prompt after the boot was completed. This time the noise was there. ata_host_intr: ata1: protocol 3 task_state 2 ata_host_intr: ata1: host_stat 0x24 ata_hsm_move: ata1: protocol 3 task_state 2 (dev_stat 0x50) ata_hsm_move: ata1: dev 0 command complete, drv_stat 0x50 ata_sg_clean: unmapping 1 sg elements ata_scsi_dump_cdb: CDB (1:0,0,0) 28 00 04 b5 d4 c8 00 00 08 ata_scsi_translate: ENTER scsi_10_lba_len: ten-byte command ata_sg_setup: ENTER, ata1 ata_sg_setup: 1 sg elements mapped ata_fill_sg: PRD[0] = (0x39A63000, 0x1000) ata_tf_load_pio: feat 0x0 nsect 0x8 lba 0xC8 0xD4 0xB5 ata_tf_load_pio: device 0xE4 ata_exec_command_pio: ata1: cmd 0xC8 ata_scsi_translate: EXIT ata_host_intr: ata1: protocol 3 task_state 2 ata_host_intr: ata1: host_stat 0x24 ata_hsm_move: ata1: protocol 3 task_state 2 (dev_stat 0x50) ata_hsm_move: ata1: dev 0 command complete, drv_stat 0x50 ata_sg_clean: unmapping 1 sg elements ata_scsi_dump_cdb: CDB (1:0,0,0) 35 00 00 00 00 00 00 00 00 ata_scsi_translate: ENTER ata_tf_load_pio: device 0xA0 ata_exec_command_pio: ata1: cmd 0xE7 ata_scsi_translate: EXIT ata_host_intr: ata1: protocol 1 task_state 2 ata_hsm_move: ata1: protocol 1 task_state 2 (dev_stat 0x50) ata_hsm_move: ata1: dev 0 command complete, drv_stat 0x50 Power down. HTH, Rolf - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
