Re: ATA Write Error and Time-out Notification in User Space

From: John Treubig
Date: Thu Jan 05 2006 - 15:25:53 EST

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In reply to: Alan Cox: "Re: ATA Write Error and Time-out Notification in User Space"
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I applied the patch to the mm and yes, we have no more hangs! The bad news is the application gets no notification that there has been any error in the drive subsystem. I have only had one instance that I got a notification back, but this was due to me adding a BUG_ON statement prior to the PRINTKs.

Here's the details of what occurs: With the application running, and I unplug the drive, my app still tries to read and write because it has gotten no error from the SG calls. Is there a way that we can notify the kernel that this device is dead and cause all future accesses to result in an error?

I have had great difficulty getting the PRINTKs to output anything for this specific error, yet I've been able to get other PRINTKs in the IDE-IO.C to output. I have attached the messages that do result.

From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
To: John Treubig <jtreubig@xxxxxxxxxxx>
CC: raw@xxxxxxxx, linux-ide@xxxxxxxxxxxxxxx,linux-kernel@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx
Subject: Re: ATA Write Error and Time-out Notification in User Space
Date: Tue, 03 Jan 2006 21:48:04 +0000

On Maw, 2006-01-03 at 13:27 -0600, John Treubig wrote:
> I receive this as great news, only I don't know where the -mm tree is
> located to see if I can get the patch or fix! Can you give me a few
> pointers?!

The -mm patches live on kernel.org in pub/linux/kernel/people/akpm/

The patch you want is the one to drivers/ide/ide-io.c although be aware
it will make non PCI ATA controllers crash on errors if applied. The
"right" fix for this is probably to have a hwif->flush_data() function
that defaults to try_to_flush_leftover_data() so that the knowledge
involved is not hacked into the ide core but kept in the driver.

Alan

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Jan 5 08:28:26 localhost kernel: [ 204.399120] ata_scsi_translate: EXIT
Jan 5 08:28:26 localhost kernel: [ 204.408979] ata_host_intr: ata2: host_stat 0x4
Jan 5 08:28:26 localhost kernel: [ 204.408987] ata_host_intr: ata2: protocol 4 (dev_stat 0x50)
Jan 5 08:28:26 localhost kernel: [ 204.408991] ata_sg_clean: unmapping 1 sg elements
Jan 5 08:28:26 localhost kernel: [ 204.408993] ata_qc_complete: EXIT
Jan 5 08:28:26 localhost kernel: [ 204.409010] ata_scsi_dump_cdb: CDB (2:0,0,0) 28 00 01 ca 9f 15 00 00 08
Jan 5 08:28:26 localhost kernel: [ 204.409013] ata_scsi_translate: ENTER
Jan 5 08:28:26 localhost kernel: [ 204.409015] scsi_10_lba_len: ten-byte command
Jan 5 08:28:26 localhost kernel: [ 204.409017] ata_sg_setup_one: mapped buffer of 4096 bytes for read
Jan 5 08:28:26 localhost kernel: [ 204.409020] ata_fill_sg: PRD[0] = (0xD048000, 0x1000)
Jan 5 08:28:26 localhost kernel: [ 204.409022] ata_dev_select: ENTER, ata2: device 0, wait 1
Jan 5 08:28:26 localhost kernel: [ 204.409050] ata_tf_load_mmio: feat 0x0 nsect 0x8 lba 0x15 0x9F 0xCA
Jan 5 08:28:26 localhost kernel: [ 204.409052] ata_tf_load_mmio: device 0xE1
Jan 5 08:28:26 localhost kernel: [ 204.409067] ata_exec_command_mmio: ata2: cmd 0xC8
Jan 5 08:28:26 localhost kernel: [ 204.409072] ata_scsi_translate: EXIT
Jan 5 08:28:26 localhost kernel: [ 204.409146] ata_host_intr: ata2: host_stat 0x4
Jan 5 08:28:26 localhost kernel: [ 204.409154] ata_host_intr: ata2: protocol 4 (dev_stat 0x50)
Jan 5 08:28:26 localhost kernel: [ 204.409158] ata_sg_clean: unmapping 1 sg elements
Jan 5 08:28:26 localhost kernel: [ 204.409160] ata_qc_complete: EXIT
Jan 5 08:28:26 localhost kernel: [ 204.409211] ata_scsi_dump_cdb: CDB (2:0,0,0) 25 00 00 00 00 00 00 00 00
Jan 5 08:28:26 localhost kernel: [ 204.409214] ata_scsiop_read_cap: ENTER
Jan 5 08:28:26 localhost kernel: [ 204.409244] ata_scsi_dump_cdb: CDB (2:0,0,0) 2a 00 00 d9 65 fb 00 00 08
Jan 5 08:28:26 localhost kernel: [ 204.409246] ata_scsi_translate: ENTER
Jan 5 08:28:26 localhost kernel: [ 204.409248] scsi_10_lba_len: ten-byte command
Jan 5 08:28:26 localhost kernel: [ 204.409251] ata_sg_setup_one: mapped buffer of 4096 bytes for write
Jan 5 08:28:26 localhost kernel: [ 204.409253] ata_fill_sg: PRD[0] = (0xD048000, 0x1000)
Jan 5 08:28:26 localhost kernel: [ 204.409256] ata_dev_select: ENTER, ata2: device 0, wait 1
Jan 5 08:28:26 localhost kernel: [ 204.409283] ata_tf_load_mmio: feat 0x0 nsect 0x8 lba 0xFB 0x65 0xD9
Jan 5 08:28:26 localhost kernel: [ 204.409285] ata_tf_load_mmio: device 0xE0
Jan 5 08:28:26 localhost kernel: [ 204.409300] ata_exec_command_mmio: ata2: cmd 0xCA
Jan 5 08:28:26 localhost kernel: [ 204.409305] ata_scsi_translate: EXIT
Jan 5 08:28:26 localhost kernel: [ 204.462137] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:26 localhost kernel: [ 205.135110] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:26 localhost kernel: [ 205.211290] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:40 localhost kernel: [ 218.368667] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:40 localhost kernel: [ 218.449054] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:40 localhost kernel: [ 218.691283] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:40 localhost kernel: [ 218.946905] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:40 localhost kernel: [ 218.948318] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:40 localhost kernel: [ 219.194021] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:40 localhost kernel: [ 219.214175] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:41 localhost kernel: [ 219.696113] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:41 localhost kernel: [ 219.697451] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:41 localhost kernel: [ 219.742827] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:41 localhost kernel: [ 219.937038] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:41 localhost kernel: [ 219.985139] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:42 localhost kernel: [ 220.445205] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:42 localhost kernel: [ 220.797927] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:42 localhost kernel: [ 220.816866] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:42 localhost kernel: [ 220.907329] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:42 localhost kernel: [ 221.089499] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:42 localhost kernel: [ 221.090284] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:42 localhost kernel: [ 221.238775] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:43 localhost kernel: [ 221.267263] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:43 localhost kernel: [ 221.536527] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:43 localhost kernel: [ 221.611554] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:43 localhost kernel: [ 221.938468] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:44 localhost kernel: [ 222.373794] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:44 localhost kernel: [ 222.374695] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:44 localhost kernel: [ 223.162135] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:44 localhost kernel: [ 223.163329] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:44 localhost kernel: [ 223.164521] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:45 localhost kernel: [ 223.813787] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:45 localhost kernel: [ 224.140885] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:46 localhost kernel: [ 224.353850] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:46 localhost kernel: [ 224.379358] ata_scsi_error: ENTER
Jan 5 08:28:46 localhost kernel: [ 224.379361] ata_eng_timeout: ENTER
Jan 5 08:28:46 localhost kernel: [ 224.379363] ata_qc_timeout: ENTER
Jan 5 08:28:46 localhost kernel: [ 224.379374] ata2: command 0xca timeout, stat 0x7f host_stat 0x1
Jan 5 08:28:46 localhost kernel: [ 224.379377] ata_sg_clean: unmapping 1 sg elements
Jan 5 08:28:46 localhost kernel: [ 224.379391] ata2: translated ATA stat/err 0x7f/7f to SCSI SK/ASC/ASCQ 0x4/00/00
Jan 5 08:28:46 localhost kernel: [ 224.379394] ata2: status=0x7f { DriveReady DeviceFault SeekComplete DataRequest CorrectedError Index Error }
Jan 5 08:28:46 localhost kernel: [ 224.379399] ata2: error=0x7f { DriveStatusError UncorrectableError SectorIdNotFound TrackZeroNotFound AddrMarkNotFound }
Jan 5 08:28:46 localhost kernel: [ 224.379411] ata_qc_complete: EXIT
Jan 5 08:28:46 localhost kernel: [ 224.379413] ata_qc_timeout: EXIT
Jan 5 08:28:46 localhost kernel: [ 224.379414] ata_eng_timeout: EXIT
Jan 5 08:28:46 localhost kernel: [ 224.379416] ata_scsi_error: EXIT
Jan 5 08:28:46 localhost kernel: [ 224.400243] ata_scsi_dump_cdb: CDB (2:0,0,0) 25 00 00 00 00 00 00 00 00
Jan 5 08:28:46 localhost kernel: [ 224.400249] ata_scsiop_read_cap: ENTER
Jan 5 08:28:46 localhost kernel: [ 224.400423] ata_scsi_dump_cdb: CDB (2:0,0,0) 2a 00 03 af fd 18 00 00 08
Jan 5 08:28:46 localhost kernel: [ 224.400426] ata_scsi_translate: ENTER
Jan 5 08:28:46 localhost kernel: [ 224.400430] scsi_10_lba_len: ten-byte command
Jan 5 08:28:46 localhost kernel: [ 224.400435] ata_sg_setup_one: mapped buffer of 4096 bytes for write
Jan 5 08:28:46 localhost kernel: [ 224.400438] ata_fill_sg: PRD[0] = (0xD048000, 0x1000)
Jan 5 08:28:46 localhost kernel: [ 224.400441] ata_dev_select: ENTER, ata2: device 0, wait 1
Jan 5 08:28:46 localhost kernel: [ 224.410486] ATA: abnormal status 0x7F on port 0xD08195DF
Jan 5 08:28:46 localhost kernel: [ 224.410504] ata_tf_load_mmio: feat 0x0 nsect 0x8 lba 0x18 0xFD 0xAF
Jan 5 08:28:46 localhost kernel: [ 224.410506] ata_tf_load_mmio: device 0xE3
Jan 5 08:28:46 localhost kernel: [ 224.410522] ata_exec_command_mmio: ata2: cmd 0xCA
Jan 5 08:28:46 localhost kernel: [ 224.410527] ata_scsi_translate: EXIT
Jan 5 08:28:46 localhost kernel: [ 224.658874] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:46 localhost kernel: [ 224.753952] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:46 localhost kernel: [ 224.874626] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:46 localhost kernel: [ 225.186896] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:47 localhost kernel: [ 226.040653] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:47 localhost kernel: [ 226.191764] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:48 localhost kernel: [ 226.348601] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:48 localhost kernel: [ 226.415600] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:48 localhost kernel: [ 226.878584] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:48 localhost kernel: [ 226.909086] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:48 localhost kernel: [ 226.933143] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:49 localhost kernel: [ 227.240286] ata_host_intr: ata2: host_stat 0x1
Jan 5 08:28:49 localhost kernel: [ 227.458131] ata_host_intr: ata2: host_stat 0x1

Next message: Lee Revell: "Re: [2.6 patch] schedule obsolete OSS drivers for removal"
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In reply to: Alan Cox: "Re: ATA Write Error and Time-out Notification in User Space"
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