2.4.21-pre2aa1 - RAID0 issue.

2.4.21-pre2aa1 - RAID0 issue.

[Srihari Vijayaraghavan]

[1.] One line summary of the problem:
2.4.20-pre2aa1 hangs while trying to bringup software RAID0 volumes, 
2.4.21-pre2 and 2.4.20-aa1 are fine with the same volumes.

[2.] Full description of the problem/report:
Unfortunately it doesn't boot even on single user mode, and I don't have 
access to a non-RAID0 computer at the moment. So I can't provide more 
information I am afraid. I have taken information from 2.4.20aa1 for this bug 
report.

 [3.] Keywords (i.e., modules, networking, kernel):
md, raid0 modules
raidtools-1.00.2-3.3 (RH 8.0 provided RPM that is)

[4.] Kernel version (from /proc/version):
Linux version 2.4.20aa1 (hari@localhost.localdomain) (gcc version 3.2 20020903 
(Red Hat Linux 8.0 3.2-7)) #10 Sat Dec 7 11:49:47 EST 2002

[5.] Output of Oops.. message (if applicable) with symbolic information 
     resolved (see Documentation/oops-tracing.txt)
N/A

[6.] A small shell script or example program which triggers the
     problem (if possible)
I can send a copy of /etc/rc.d/rc.sysinit which tries to activate RAID 
volumes, if needed. It uses /proc/mdstat, /sbin/raidstart, /sbin/raid0run, 
/sbin/raidadd, /sbin/raidrun etc..

[7.] Environment
[7.1.] Software (add the output of the ver_linux script here)
Linux localhost.localdomain 2.4.20aa1 #10 Sat Dec 7 11:49:47 EST 2002 i686 
athlon i386 GNU/Linux

Gnu C                  3.2
Gnu make               3.79.1
util-linux             2.11r
mount                  2.11r
modutils               2.4.18
e2fsprogs              1.27
jfsutils               1.0.17
reiserfsprogs          3.6.2
pcmcia-cs              3.1.31
PPP                    2.4.1
isdn4k-utils           3.1pre4
Linux C Library        2.2.93
Dynamic linker (ldd)   2.2.93
Procps                 2.0.7
Net-tools              1.60
Kbd                    1.06
Sh-utils               2.0.12
Modules Loaded         sr_mod emu10k1 ac97_codec soundcore radeon agpgart 
af_packet ipt_REJECT iptable_filter ip_tables ide-scsi scsi_mod ide-cd cdrom 
raid0 md rtc unix

[7.2.] Processor information (from /proc/cpuinfo):
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 4
model name      : AMD Athlon(tm) Processor
stepping        : 2
cpu MHz         : 1200.061
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat 
pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips        : 2392.06

[7.3.] Module information (from /proc/modules):
sr_mod                 15928   0 (autoclean)
emu10k1                63648   0 (autoclean)
ac97_codec             13576   0 (autoclean) [emu10k1]
soundcore               6532   4 (autoclean) [emu10k1]
radeon                 87384   3
agpgart                20316   3
af_packet              11464   0 (autoclean)
ipt_REJECT              3736   2 (autoclean)
iptable_filter          2412   1 (autoclean)
ip_tables              14648   2 [ipt_REJECT iptable_filter]
ide-scsi               10512   0
scsi_mod               98964   2 [sr_mod ide-scsi]
ide-cd                 33412   0
cdrom                  33344   0 [sr_mod ide-cd]
raid0                   3912   4 (autoclean)
md                     57376   8 [raid0]
rtc                     8500   0 (autoclean)
unix                   17832 153 (autoclean)

[7.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)
/proc/ioports:
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0376-0376 : ide1
03c0-03df : vga+
03f6-03f6 : ide0
0cf8-0cff : PCI conf1
5000-500f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
6000-607f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
9000-9fff : PCI Bus #01
  9000-90ff : ATI Technologies Inc Radeon VE QY
a000-a003 : Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System Controller
a400-a40f : VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE
  a400-a407 : ide0
  a408-a40f : ide1
a800-a81f : VIA Technologies, Inc. USB
ac00-ac1f : VIA Technologies, Inc. USB (#2)
c000-c01f : Creative Labs SB Live! EMU10k1
  c000-c01f : EMU10K1
c400-c407 : Creative Labs SB Live! MIDI/Game Port

/proc/iomem:
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-1ffeffff : System RAM
  00100000-001e9d83 : Kernel code
  001e9d84-0021c81f : Kernel data
1fff0000-1fff2fff : ACPI Non-volatile Storage
1fff3000-1fffffff : ACPI Tables
d0000000-d7ffffff : Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System 
Controller
d8000000-dfffffff : PCI Bus #01
  d8000000-dfffffff : ATI Technologies Inc Radeon VE QY
e0000000-e1ffffff : PCI Bus #01
  e1000000-e100ffff : ATI Technologies Inc Radeon VE QY
e2000000-e2000fff : Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System 
Controller
ffff0000-ffffffff : reserved

[7.5.] PCI information ('lspci -vvv' as root)
00:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] System 
Controller (rev 12)
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort+ >SERR- <PERR-
        Latency: 32
        Region 0: Memory at d0000000 (32-bit, prefetchable) [size=128M]
        Region 1: Memory at e2000000 (32-bit, prefetchable) [size=4K]
        Region 2: I/O ports at a000 [disabled] [size=4]
        Capabilities: [a0] AGP version 2.0
                Status: RQ=15 SBA+ 64bit- FW+ Rate=x1,x2,x4
                Command: RQ=0 SBA+ AGP+ 64bit- FW- Rate=x1

00:01.0 PCI bridge: Advanced Micro Devices [AMD] AMD-760 [IGD4-1P] AGP Bridge 
(prog-if 00 [Normal decode])
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B-
        Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
        I/O behind bridge: 00009000-00009fff
        Memory behind bridge: e0000000-e1ffffff
        Prefetchable memory behind bridge: d8000000-dfffffff
        BridgeCtl: Parity- SERR+ NoISA+ VGA+ MAbort- >Reset- FastB2B-

00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 
40)
        Subsystem: VIA Technologies, Inc. VT82C686/A PCI to ISA Bridge
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping+ SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Capabilities: [c0] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.1 IDE interface: VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE 
(rev 06) (prog-if 8a [Master SecP PriP])
        Subsystem: VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32
        Region 4: I/O ports at a400 [size=16]
        Capabilities: [c0] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.2 USB Controller: VIA Technologies, Inc. USB (rev 16) (prog-if 00 
[UHCI])
        Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32, cache line size 08
        Interrupt: pin D routed to IRQ 10
        Region 4: I/O ports at a800 [size=32]
        Capabilities: [80] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.3 USB Controller: VIA Technologies, Inc. USB (rev 16) (prog-if 00 
[UHCI])
        Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32, cache line size 08
        Interrupt: pin D routed to IRQ 10
        Region 4: I/O ports at ac00 [size=32]
        Capabilities: [80] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.4 SMBus: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
        Subsystem: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
        Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Interrupt: pin ? routed to IRQ 9
        Capabilities: [68] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0c.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 06)
        Subsystem: Creative Labs CT4832 SBLive! Value
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (500ns min, 5000ns max)
        Interrupt: pin A routed to IRQ 10
        Region 0: I/O ports at c000 [size=32]
        Capabilities: [dc] Power Management version 1
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0c.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 
06)
        Subsystem: Creative Labs Gameport Joystick
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32
        Region 0: I/O ports at c400 [size=8]
        Capabilities: [dc] Power Management version 1
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:05.0 VGA compatible controller: ATI Technologies Inc Radeon VE QY (prog-if 
00 [VGA])
        Subsystem: Unknown device 1787:0202
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping+ SERR- FastB2B-
        Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (2000ns min), cache line size 08
        Interrupt: pin A routed to IRQ 11
        Region 0: Memory at d8000000 (32-bit, prefetchable) [size=128M]
        Region 1: I/O ports at 9000 [size=256]
        Region 2: Memory at e1000000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at <unassigned> [disabled] [size=128K]
        Capabilities: [58] AGP version 2.0
                Status: RQ=47 SBA+ 64bit- FW- Rate=x1,x2,x4
                Command: RQ=15 SBA+ AGP+ 64bit- FW- Rate=x1
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

[7.7.] Other information that might be relevant to the problem
       (please look in /proc and include all information that you
       think to be relevant):
All file systems are EXT3. /usr, /var, /tmp, /home on RAID0.

/etc/raidtab shows (for eg, for /dev/md0 which hosts /usr):
raiddev             /dev/md0
raid-level                  0
nr-raid-disks               2
chunk-size                  64k
persistent-superblock       1
nr-spare-disks              0
    device          /dev/hda3
    raid-disk     0
    device          /dev/hdc1
    raid-disk     1

(remaining entries for /dev/md1, /dev/md2 and /dev/md3 are very similar)

[X.] Other notes, patches, fixes, workarounds:
I can verify if 2.4.21-pre2aa1 is fine on a non-RAID computer later today.

Please cc me if you can. Thanks. Happy New Year everyone!
-- 
Hari
harisri@bigpond.com

2.4.21-pre3aa1 and RAID0 issue (was: 2.4.21-pre2aa1 - RAID0 issue.)

[Srihari Vijayaraghavan]

Hello,

On Friday 27 December 2002 08:56, Srihari Vijayaraghavan wrote:
> [1.] One line summary of the problem:
> 2.4.20-pre2aa1 hangs while trying to bringup software RAID0 volumes,
> 2.4.21-pre2 and 2.4.20-aa1 are fine with the same volumes.

The RAID0 doesn't work in 2.4.21-pre3aa1 in my computer, while it is fine with 
2.4.21-pre3 and 2.4.20-aa1.

The hardware and software details continue to be the same as per the previous 
report ( http://marc.theaimsgroup.com/?l=linux-kernel&m=104093932820352&w=2 
).

Please cc me if you can, sorry if it is a known issue. Thanks.
-- 
Hari
harisri@bigpond.com

Re: 2.4.21-pre3aa1 and RAID0 issue (was: 2.4.21-pre2aa1 - RAID0 issue.)

[Srihari Vijayaraghavan]

Hello,

On Wednesday 22 January 2003 20:07, Srihari Vijayaraghavan wrote:
> ...
> The RAID0 doesn't work in 2.4.21-pre3aa1 in my computer, while it is fine
> with 2.4.21-pre3 and 2.4.20-aa1.
> ...

Ok. I did some more testing, and this is what happens:
/sbin/raidstart /dev/md0 executes and exits fine under 2.4.21-pre3. Where as 
under 2.4.21-pre3aa1 it starts executing but _never_ exits (I waited for few 
minutes). I had to kill it using alt + sysrq + k.

I have captured the dmesg outputs of both 2.4.21-pre3aa1 and 2.4.21-pre3 and 
here is the diff between them:
 --- dmesg-2.4.21-pre3aa1	2003-01-23 00:38:11.000000000 +1100
+++ dmesg-2.4.21-pre3	2003-01-23 00:41:11.000000000 +1100
@@ -1,4 +1,4 @@
-Linux version 2.4.21-pre3aa1 (hari@localhost.localdomain) (gcc version 3.2 
20020903 (Red Hat Linux 8.0 3.2-7)) #9 Tue Jan 21 23:27:11 EST 2003
+Linux version 2.4.21-pre3 (hari@localhost.localdomain) (gcc version 3.2 
20020903 (Red Hat Linux 8.0 3.2-7)) #9 Wed Jan 22 19:28:29 EST 2003
 BIOS-provided physical RAM map:
  BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
  BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
@@ -12,14 +12,13 @@
 zone(0): 4096 pages.
 zone(1): 126960 pages.
 zone(2): 0 pages.
-Building zonelist for node : 0
 Kernel command line: ro root=/dev/hda5 hdb=ide-scsi single
 ide_setup: hdb=ide-scsi
 Initializing CPU#0
-Detected 1200.072 MHz processor.
+Detected 1200.061 MHz processor.
 Console: colour VGA+ 80x25
 Calibrating delay loop... 2392.06 BogoMIPS
-Memory: 516560k/524224k available (955k kernel code, 7276k reserved, 209k 
data, 220k init, 0k highmem)
+Memory: 516652k/524224k available (923k kernel code, 7184k reserved, 204k 
data, 216k init, 0k highmem)
 Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
 Inode cache hash table entries: 32768 (order: 6, 262144 bytes)
 Mount-cache hash table entries: 8192 (order: 4, 65536 bytes)
@@ -45,9 +44,6 @@
 Based upon Swansea University Computer Society NET3.039
 Initializing RT netlink socket
 Starting kswapd
-bigpage subsystem: allocated 0 bigpages (=0MB).
-aio_setup: num_physpages = 32764
-aio_setup: sizeof(struct page) = 44
 Journalled Block Device driver loaded
 pty: 256 Unix98 ptys configured
 Uniform Multi-Platform E-IDE driver Revision: 7.00beta-2.4
@@ -61,12 +57,12 @@
 hda: QUANTUM FIREBALL CX10.2A, ATA DISK drive
 hdb: RICOH CD-R/RW MP7083A, ATAPI CD/DVD-ROM drive
 hda: DMA disabled
-blk: queue c028ace0, I/O limit 4095Mb (mask 0xffffffff)
+blk: queue c0274460, I/O limit 4095Mb (mask 0xffffffff)
 hdb: DMA disabled
 hdc: SAMSUNG SV1022D, ATA DISK drive
 hdd: Pioneer DVD-ROM ATAPIModel DVD-113 0113, ATAPI CD/DVD-ROM drive
 hdc: DMA disabled
-blk: queue c028b144, I/O limit 4095Mb (mask 0xffffffff)
+blk: queue c02748ac, I/O limit 4095Mb (mask 0xffffffff)
 hdd: DMA disabled
 ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
 ide1 at 0x170-0x177,0x376 on irq 15
@@ -84,7 +80,7 @@
 kjournald starting.  Commit interval 5 seconds
 EXT3-fs: mounted filesystem with ordered data mode.
 VFS: Mounted root (ext3 filesystem) readonly.
-Freeing unused kernel memory: 220k freed
+Freeing unused kernel memory: 216k freed
 NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
 Real Time Clock Driver v1.10e
 EXT3 FS 2.4-0.9.19, 19 August 2002 on ide0(3,5), internal journal
@@ -128,4 +124,5 @@
 raid0 : Allocating 8 bytes for hash.
 md: updating md0 RAID superblock on device
 md: hdc1 [events: 00000193]<6>(write) hdc1's sb offset: 2562240
-SysRq : SAK
+md: hda3 [events: 00000193]<6>(write) hda3's sb offset: 2562240
+md: ... autorun DONE.

It looks though the kernel raid sub-system on 2.4.21-pre3aa1 is not able to 
access/activate /dev/hda3 properly, which is part of /dev/md0 raid0 array 
(this raid0 array is made up of /dev/hdc1 and /dev/hda3).

Please feel free to ask for more informartion. Thanks.
-- 
Hari
harisri@bigpond.com

Solved 2.4.21-pre3aa1 and RAID-0 issue (was: Re: 2.4.21-pre3aa1 and RAID0 issue]

[Srihari Vijayaraghavan]

Hello Andrea,

On Thursday 23 January 2003 01:02, Srihari Vijayaraghavan wrote:
> ...
> Ok. I did some more testing, and this is what happens:
> /sbin/raidstart /dev/md0 executes and exits fine under 2.4.21-pre3. Where
> as under 2.4.21-pre3aa1 it starts executing but _never_ exits (I waited for
> few minutes). I had to kill it using alt + sysrq + k.
> ...

The 9985_blk-atomic-aa5 patch is causing this regression. Backing this patch 
out of 2.4.21-pre3aa1 makes it to work nicely with Software RAID-0.

Thanks.
-- 
Hari
harisri@bigpond.com

Re: Solved 2.4.21-pre3aa1 and RAID-0 issue (was: Re: 2.4.21-pre3aa1 and RAID0 issue]

[Jens Axboe]

On Mon, Jan 27 2003, Srihari Vijayaraghavan wrote:
> Hello Andrea,
> 
> On Thursday 23 January 2003 01:02, Srihari Vijayaraghavan wrote:
> > ...
> > Ok. I did some more testing, and this is what happens:
> > /sbin/raidstart /dev/md0 executes and exits fine under 2.4.21-pre3. Where
> > as under 2.4.21-pre3aa1 it starts executing but _never_ exits (I waited for
> > few minutes). I had to kill it using alt + sysrq + k.
> > ...
> 
> The 9985_blk-atomic-aa5 patch is causing this regression. Backing this patch 
> out of 2.4.21-pre3aa1 makes it to work nicely with Software RAID-0.

Could you please try this patch on top of 2.4.21-pre3aa1 instead of
backing out blk-atomic? Does that work, too? Thanks!

===== drivers/md/md.c 1.38 vs edited =====
--- 1.38/drivers/md/md.c	Thu Jan 16 00:15:01 2003
+++ edited/drivers/md/md.c	Mon Jan 27 12:23:41 2003
@@ -494,6 +494,7 @@
 	bh.b_page = page;
 	bh.b_reqnext = NULL;
 	bh.b_data = page_address(page);
+	bh.b_elv_sequence = 0;
 	generic_make_request(rw, &bh);
 
 	run_task_queue(&tq_disk);
===== drivers/md/raid1.c 1.15 vs edited =====
--- 1.15/drivers/md/raid1.c	Sat Aug 31 02:20:48 2002
+++ edited/drivers/md/raid1.c	Mon Jan 27 12:27:44 2003
@@ -686,6 +686,7 @@
  		mbh->b_list       = BUF_LOCKED;
  		mbh->b_end_io     = raid1_end_request;
  		mbh->b_private    = r1_bh;
+		mbh->b_elv_sequence = bh->b_elv_sequence;
 
 		mbh->b_next = r1_bh->mirror_bh_list;
 		r1_bh->mirror_bh_list = mbh;
@@ -1456,6 +1457,7 @@
 	bh->b_private = r1_bh;
 	bh->b_blocknr = sector_nr;
 	bh->b_rsector = sector_nr;
+	bh->b_elv_sequence = 0;
 	init_waitqueue_head(&bh->b_wait);
 
 	generic_make_request(READ, bh);

-- 
Jens Axboe

Re: Solved 2.4.21-pre3aa1 and RAID-0 issue (was: Re: 2.4.21-pre3aa1 and RAID0 issue]

[Srihari Vijayaraghavan]

Hello Jens,

On Monday 27 January 2003 22:30, Jens Axboe wrote:
> Could you please try this patch on top of 2.4.21-pre3aa1 instead of
> backing out blk-atomic? Does that work, too? Thanks!

Yes, the RAID-0 works fine on 2.4.21-pre3aa1 after applying your patch on top 
of it.

Thanks.
-- 
Hari
harisri@bigpond.com

Re: Solved 2.4.21-pre3aa1 and RAID-0 issue (was: Re: 2.4.21-pre3aa1 and RAID0 issue]

[Jens Axboe]

On Tue, Jan 28 2003, Srihari Vijayaraghavan wrote:
> Hello Jens,
> 
> On Monday 27 January 2003 22:30, Jens Axboe wrote:
> > Could you please try this patch on top of 2.4.21-pre3aa1 instead of
> > backing out blk-atomic? Does that work, too? Thanks!
> 
> Yes, the RAID-0 works fine on 2.4.21-pre3aa1 after applying your patch on top 
> of it.

Great, thanks for confirming that it solves the problem.

-- 
Jens Axboe

Re: Solved 2.4.21-pre3aa1 and RAID-0 issue (was: Re: 2.4.21-pre3aa1 and RAID0 issue]

[Andrea Arcangeli]

On Tue, Jan 28, 2003 at 10:44:33AM +0100, Jens Axboe wrote:
> On Tue, Jan 28 2003, Srihari Vijayaraghavan wrote:
> > Hello Jens,
> > 
> > On Monday 27 January 2003 22:30, Jens Axboe wrote:
> > > Could you please try this patch on top of 2.4.21-pre3aa1 instead of
> > > backing out blk-atomic? Does that work, too? Thanks!
> > 
> > Yes, the RAID-0 works fine on 2.4.21-pre3aa1 after applying your patch on top 
> > of it.
> 
> Great, thanks for confirming that it solves the problem.

thanks. the patch is obviously right indeed.

Andrea