Home » Mailing lists » Devel » megaraid_mbox: garbage in file
| Re: megaraid_mbox: garbage in file [message #2990 is a reply to message #2986] |
Fri, 05 May 2006 09:18   |
vaverin
Messages: 708
Registered: September 2005
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Senior Member |
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Small update:
When I use
cat /vz/private/101/root/etc/ld.so.cache >/tmp/ttt
I've get "access beyond end of device" and garbage in buffers
Then I create the same scsi read command by using sgp_dd utils:
sgp_dd count=26 if=/dev/sg0 skip=871769260 of=/tmp/ttt.sgp
and get correct file content without any errors.
The only difference that I see is use_sg=3 for cat and use_sg=1 for dd.
dmesg with scsi debugs and output files are attached.
Node will be accessible for some time and I can perform some experiments. If
somebody wants I can request the customer about access on the node.
Thank you,
Vasily Averin
SWsoft Virtuozzo/OpenVZ Linux kernel team
Vasily Averin wrote:
> James Bottomley wrote:
>>On Thu, 2006-05-04 at 22:48 +0400, Vasily Averin wrote:
>>>attempt to access beyond end of device
>>>sda6: rw=0, want=1044134458, limit=951401367
>>>Buffer I/O error on device sda6, logical block 522067228
>>That's not a SCSI error. It's coming from the block layer and it means
>>that the filesystem tried to access beyond the end of the listed
>>partition. Why that happened is anyone's guess. I suspect the actual
>>filesystem is corrupt somehow, but how it came to be, I don't know.
>
> James,
>
> The issue is that the correctly finished scsi read command return me garbage
> (repeated 0 ...127 -- see hexdump in my first letter) instead correct file content.
> "attempt to access beyond end of device" messages occurs due the same garbage
> readed from the Indirect block. I found this garbage present in data buffers
> beginning at megaraid driver functions.
>
> I would note that if I read the same file by using dd with bs=1024 or bs=512 --
> I get correct file content.
>
> When I use kernel with 4Gb memory limit -- the same cat command return me
> correct file content too, without any garbage.
>
> Question is what it is the strange garbage? Have you seen it earlier?
> Is it possible that it is some driver-related issue or it is broken hardware?
> And why I can workaround this issue by using only 4Gb memory?
>
> Thank you,
> Vasily Averin
>
> SWsoft Virtuozzo/OpenVZ Linux kernel team
>
Linux version 2.6.16 (vvs@dhcp0-157) (gcc version 3.3.5 20050117 (prerelease) (SUSE Linux)) #1 SMP Thu May 4 17:49:16 MSD 2006
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 00000000fbff0000 (usable)
BIOS-e820: 00000000fbff0000 - 00000000fbfff000 (ACPI data)
BIOS-e820: 00000000fbfff000 - 00000000fc000000 (ACPI NVS)
BIOS-e820: 00000000ff780000 - 0000000100000000 (reserved)
BIOS-e820: 0000000100000000 - 0000000200000000 (usable)
7296MB HIGHMEM available.
896MB LOWMEM available.
found SMP MP-table at 000ff780
NX (Execute Disable) protection: active
On node 0 totalpages: 2097152
DMA zone: 4096 pages, LIFO batch:0
DMA32 zone: 0 pages, LIFO batch:0
Normal zone: 225280 pages, LIFO batch:31
HighMem zone: 1867776 pages, LIFO batch:31
DMI 2.3 present.
ACPI: RSDP (v002 ACPIAM ) @ 0x000f6dd0
ACPI: XSDT (v001 A M I OEMXSDT 0x12000527 MSFT 0x00000097) @ 0xfbff0100
ACPI: FADT (v001 A M I OEMFACP 0x12000527 MSFT 0x00000097) @ 0xfbff0281
ACPI: MADT (v001 A M I OEMAPIC 0x12000527 MSFT 0x00000097) @ 0xfbff0380
ACPI: OEMB (v001 A M I OEMBIOS 0x12000527 MSFT 0x00000097) @ 0xfbfff040
ACPI: SRAT (v001 A M I OEMSRAT 0x12000527 MSFT 0x00000097) @ 0xfbff39b0
ACPI: HPET (v001 A M I OEMHPET 0x12000527 MSFT 0x00000097) @ 0xfbff3ac0
ACPI: ASF! (v001 AMIASF AMDSTRET 0x00000001 INTL 0x02002026) @ 0xfbff3b00
ACPI: DSDT (v001 0AAAA 0AAAA001 0x00000001 INTL 0x02002026) @ 0x00000000
ACPI: PM-Timer IO Port: 0x5008
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
Processor #0 15:5 APIC version 16
ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
Processor #1 15:5 APIC version 16
ACPI: LAPIC (acpi_id[0x03] lapic_id[0x82] disabled)
ACPI: LAPIC (acpi_id[0x04] lapic_id[0x83] disabled)
ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23
ACPI: IOAPIC (id[0x03] address[0xfebff000] gsi_base[24])
IOAPIC[1]: apic_id 3, version 17, address 0xfebff000, GSI 24-27
ACPI: IOAPIC (id[0x04] address[0xfebfe000] gsi_base[28])
IOAPIC[2]: apic_id 4, version 17, address 0xfebfe000, GSI 28-31
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: IRQ0 used by override.
ACPI: IRQ2 used by override.
ACPI: IRQ9 used by override.
Enabling APIC mode: Flat. Using 3 I/O APICs
ACPI: HPET id: 0x102282a0 base: 0xfec01000
Using ACPI (MADT) for SMP configuration information
Allocating PCI resources starting at fc400000 (gap: fc000000:03780000)
Built 1 zonelists
Kernel command line: ro root=LABEL=/1 debug panic=5
mapped APIC to ffffd000 (fee00000)
mapped IOAPIC to ffffc000 (fec00000)
mapped IOAPIC to ffffb000 (febff000)
mapped IOAPIC to ffffa000 (febfe000)
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
CPU 0 irqstacks, hard=c0565000 soft=c0545000
PID hash table entries: 4096 (order: 12, 65536 bytes)
Console: colour VGA+ 80x25
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Memory: 8248540k/8388608k available (3118k kernel code, 73068k reserved, 940k data, 288k init, 7405504k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Using HPET for base-timer
Using HPET for gettimeofday
Detected 1990.876 MHz processor.
Using hpet for high-res timesource
Calibrating delay using timer specific routine.. 3987.38 BogoMIPS (lpj=7974771)
Mount-cache hash table entries: 512
CPU: After generic identify, caps: 078bfbff e1d3fbff 00000000 00000000 00000000 00000000 00000000
CPU: After vendor identify, caps: 078bfbff e1d3fbff 00000000 00000000 00000000 00000000 00000000
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU: After all inits, caps: 078bfbff e1d3fbff 00000000 00000010 00000000 00000000 00000000
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
Checking 'hlt' instruction... OK.
CPU0: AMD Opteron(tm) Processor 246 stepping 0a
Booting processor 1/1 eip 2000
CPU 1 irqstacks, hard=c0566000 soft=c0546000
Initializing CPU#1
Calibrating delay using timer specific routine.. 3981.36 BogoMIPS (lpj=7962728)
CPU: After generic identify, caps: 078bfbff e1d3fbff 00000000 00000000 00000000 00000000 00000000
CPU: After vendor identify, caps: 078bfbff e1d3fbff 00000000 00000000 00000000 00000000 00000000
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 1024K (64 bytes/line)
CPU: After all inits, caps: 078bfbff e1d3fbff 00000000 00000010 00000000 00000000 00000000
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#1.
CPU1: AMD Opteron(tm) Processor 246 stepping 0a
Total of 2 processors activated (7968.74 BogoMIPS).
ENABLING IO-APIC IRQs
..TIMER: vector=0x31 apic1=0 pin1=2 apic2=0 pin2=0
checking TSC synchronization across 2 CPUs: passed.
Brought up 2 CPUs
migration_cost=4000
checking if image is initramfs...it isn't (no cpio magic); looks like an initrd
Freeing initrd memory: 589k freed
NET: Registered protocol family 16
ACPI: bus type pci registered
PCI: PCI BIOS revision 2.10 entry at 0xf0031, last bus=3
PCI: Using configuration type 1
ACPI: Subsystem revision 20060127
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
PCI: Probing PCI hardware (bus 00)
Boot video device is 0000:03:06.0
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCI1._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.GOLA._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.GOLB._PRT]
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 *5 6 7 9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 *10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
SCSI subsystem initialized
PCI: Using ACPI for IRQ routing
PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report
PCI: Bridge: 0000:00:06.0
IO window: b000-bfff
MEM window: fca00000-feafffff
PREFETCH window: disabled.
PCI: Bridge: 0000:00:0a.0
IO window: disabled.
MEM window: fc900000-fc9fffff
PREFETCH window: ff500000-ff5fffff
PCI: Bridge: 0000:00:0b.0
IO window: disabled.
MEM window: fc800000-fc8fffff
PREFETCH window: ff400000-ff4fffff
highmem bounce pool size: 64 pages
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
PCI: MSI quirk detected. pci_msi_quirk set.
PCI: MSI quirk detected. pci_msi_quirk set.
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
Real Time Clock Driver v1.12ac
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
Compaq SMART2 Driver (v 2.6.0)
HP CISS Driver (v 2.6.10)
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
AMD8111: IDE controller at PCI slot 0000:00:
...
-
Attachment: ttt
(Size: 16.00KB, Downloaded 321 times)
-
Attachment: ttt.sgp
(Size: 13.00KB, Downloaded 303 times)
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