* [linux-lvm] Problems binding raw devices to PV's
@ 2001-12-19 18:52 Andrew Patterson
2001-12-20 14:05 ` Heinz J . Mauelshagen
0 siblings, 1 reply; 4+ messages in thread
From: Andrew Patterson @ 2001-12-19 18:52 UTC (permalink / raw)
To: linux-lvm; +Cc: justin_forrester
We are having problems when running vgchange to activate volume groups
that have raw devices bound to it's PV's. We are currently using
LVM 1.0.1-rc4 running on Linux kernel 2.4.14.
Andrew
Reproducing problem:
--------------------
1. Establish raw device <--> scsi disk device bindings using raw
utility
2. Create 1 vg with 2 pv's (problem not seen with only 1 pv)
3. Deactivate vg with vgchange
4. When you re-activate the vg with vgchange, something is corrupted
such that the raw mappings appear to have been changed.
5. The next attempt to change back the raw binding causes segfault in
the raw utility, accompanied by a kernel stack trace on the
console/syslog
6. The next attempt to change back the raw binding causes the system
to completely lock up/wedge.
Capture showing problem:
------------------------
jerry#
jerry#
jerry# raw /dev/raw2 8 16
/dev/raw/raw2: bound to major 8, minor 16
jerry# raw /dev/raw3 8 32
/dev/raw/raw3: bound to major 8, minor 32
jerry# raw /dev/raw3 8 48
/dev/raw/raw4: bound to major 8, minor 48
jerry# raw /dev/raw4 8 64
/dev/raw/raw5: bound to major 8, minor 64
jerry# raw /dev/raw5 8 80
/dev/raw/raw6: bound to major 8, minor 80
jerry# raw /dev/raw6 8 96
/dev/raw/raw7: bound to major 8, minor 96
jerry# raw /dev/raw8 8 112
/dev/raw/raw8: bound to major 8, minor 112
jerry# raw /dev/raw9 8 128
/dev/raw/raw9: bound to major 8, minor 128
jerry#
jerry#
jerry# raw -qa
/dev/raw/raw2: bound to major 8, minor 16
/dev/raw/raw3: bound to major 8, minor 32
/dev/raw/raw4: bound to major 8, minor 48
/dev/raw/raw5: bound to major 8, minor 64
/dev/raw/raw6: bound to major 8, minor 80
/dev/raw/raw7: bound to major 8, minor 96
/dev/raw/raw8: bound to major 8, minor 112
/dev/raw/raw9: bound to major 8, minor 128
jerry# pvcreate /dev/sdf
pvcreate -- physical volume "/dev/sdf" successfully created
jerry# pvcreate /dev/sdg
pvcreate -- physical volume "/dev/sdg" successfully created
jerry# vgcreate testVG1 /dev/sdf /dev/sdg
vgcreate -- INFO: using default physical extent size 4.00 MB
vgcreate -- INFO: maximum logical volume size is 255.99 Gigabyte
vgcreate -- doing automatic backup of volume group "testVG1"
vgcreate -- volume group "testVG1" successfully created and activated
jerry# raw -qa
/dev/raw/raw2: bound to major 8, minor 16
/dev/raw/raw3: bound to major 8, minor 32
/dev/raw/raw4: bound to major 8, minor 48
/dev/raw/raw5: bound to major 8, minor 64
/dev/raw/raw6: bound to major 8, minor 80
/dev/raw/raw7: bound to major 8, minor 96
/dev/raw/raw8: bound to major 8, minor 112
/dev/raw/raw9: bound to major 8, minor 128
jerry#
jerry#
jerry# vgchange -an testVG1
vgchange -- volume group "testVG1" successfully deactivated
jerry# raw -qa
/dev/raw/raw2: bound to major 8, minor 16
/dev/raw/raw3: bound to major 8, minor 32
/dev/raw/raw4: bound to major 8, minor 48
/dev/raw/raw5: bound to major 8, minor 64
/dev/raw/raw6: bound to major 8, minor 80
/dev/raw/raw7: bound to major 8, minor 96
/dev/raw/raw8: bound to major 8, minor 112
/dev/raw/raw9: bound to major 8, minor 128
jerry#
jerry#
jerry# vgchange -ay testVG1
vgchange -- volume group "testVG1" successfully activated
jerry# raw -qa
/dev/raw/raw2: bound to major 8, minor 16
/dev/raw/raw3: bound to major 8, minor 32
/dev/raw/raw4: bound to major 8, minor 48
/dev/raw/raw5: bound to major 8, minor 64
/dev/raw/raw6: bound to major 8, minor 96 <------ CHANGED/WRONG
/dev/raw/raw7: bound to major 8, minor 80 <------ CHANGED/WRONG
/dev/raw/raw8: bound to major 8, minor 112
/dev/raw/raw9: bound to major 8, minor 128
jerry#
jerry#
jerry# raw /dev/raw6 0 0
Segmentation fault
>>>>>>>>>> THIS APPEARED ON CONSOLE/SYSLOG >>>>>>>>>>>>>>>>>>
Dec 19 15:53:32 jerry kernel: invalid operand: 0000
Dec 19 15:53:32 jerry kernel: CPU: 0
Dec 19 15:53:32 jerry kernel: EIP: 0010:[<c01396a2>] Not tainted
Dec 19 15:53:32 jerry kernel: EFLAGS: 00010202
Dec 19 15:53:32 jerry kernel: eax: 00000001 ebx: 000000d8 ecx: c1e72de8
edx: 00000001
Dec 19 15:53:32 jerry kernel: esi: c1e72de0 edi: c03f5880 ebp: f2e41f88
esp: f2e41f60
Dec 19 15:53:32 jerry kernel: ds: 0018 es: 0018 ss: 0018
Dec 19 15:53:32 jerry kernel: Process raw (pid: 506, stackpage=f2e41000)
Dec 19 15:53:32 jerry kernel: Stack: 000000d8 c03f5968 c03f5880 c0207f16
c1e72de0 f3858d20 bffffcd0 0000ac00
Dec 19 15:53:32 jerry kernel: ffffffe7 00000000 00000006 00000000
00000000 00000000 00000000 c01415a7
Dec 19 15:53:32 jerry kernel: f638d920 f3858d20 0000ac00 bffffcd0
f2e40000 bffffde4 bffffd1c 00000004
Dec 19 15:53:32 jerry kernel: Call Trace: [<c0207f16>] [<c01415a7>]
[<c0106d6f>]
Dec 19 15:53:32 jerry kernel:
Dec 19 15:53:32 jerry kernel: Code: 0f 0b 8b 56 04 8b 06 89 50 04 89 02 8b 5e
30 8d 46 30 39 c3
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
jerry#
jerry#
jerry# raw /dev/raw7 8 96
>>>>>>>>>>>> SYSTEM LOCKED-UP COMPLETELY >>>>>>>>>>>>>>>>>>>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [linux-lvm] Problems binding raw devices to PV's
2001-12-19 18:52 [linux-lvm] Problems binding raw devices to PV's Andrew Patterson
@ 2001-12-20 14:05 ` Heinz J . Mauelshagen
2001-12-20 14:14 ` Andrew Patterson
0 siblings, 1 reply; 4+ messages in thread
From: Heinz J . Mauelshagen @ 2001-12-20 14:05 UTC (permalink / raw)
To: linux-lvm
Hi Andrew,
I admit that the oops shouldn't happen but what's the use of binding
raw devices to PVs anyway?
Regards,
Heinz
On Wed, Dec 19, 2001 at 05:54:12PM -0700, Andrew Patterson wrote:
>
> We are having problems when running vgchange to activate volume groups
> that have raw devices bound to it's PV's. We are currently using
> LVM 1.0.1-rc4 running on Linux kernel 2.4.14.
>
> Andrew
>
> Reproducing problem:
> --------------------
> 1. Establish raw device <--> scsi disk device bindings using raw
> utility
> 2. Create 1 vg with 2 pv's (problem not seen with only 1 pv)
> 3. Deactivate vg with vgchange
> 4. When you re-activate the vg with vgchange, something is corrupted
> such that the raw mappings appear to have been changed.
> 5. The next attempt to change back the raw binding causes segfault in
> the raw utility, accompanied by a kernel stack trace on the
> console/syslog
> 6. The next attempt to change back the raw binding causes the system
> to completely lock up/wedge.
>
> Capture showing problem:
> ------------------------
> jerry#
> jerry#
> jerry# raw /dev/raw2 8 16
> /dev/raw/raw2: bound to major 8, minor 16
> jerry# raw /dev/raw3 8 32
> /dev/raw/raw3: bound to major 8, minor 32
> jerry# raw /dev/raw3 8 48
> /dev/raw/raw4: bound to major 8, minor 48
> jerry# raw /dev/raw4 8 64
> /dev/raw/raw5: bound to major 8, minor 64
> jerry# raw /dev/raw5 8 80
> /dev/raw/raw6: bound to major 8, minor 80
> jerry# raw /dev/raw6 8 96
> /dev/raw/raw7: bound to major 8, minor 96
> jerry# raw /dev/raw8 8 112
> /dev/raw/raw8: bound to major 8, minor 112
> jerry# raw /dev/raw9 8 128
> /dev/raw/raw9: bound to major 8, minor 128
> jerry#
> jerry#
> jerry# raw -qa
> /dev/raw/raw2: bound to major 8, minor 16
> /dev/raw/raw3: bound to major 8, minor 32
> /dev/raw/raw4: bound to major 8, minor 48
> /dev/raw/raw5: bound to major 8, minor 64
> /dev/raw/raw6: bound to major 8, minor 80
> /dev/raw/raw7: bound to major 8, minor 96
> /dev/raw/raw8: bound to major 8, minor 112
> /dev/raw/raw9: bound to major 8, minor 128
> jerry# pvcreate /dev/sdf
> pvcreate -- physical volume "/dev/sdf" successfully created
>
> jerry# pvcreate /dev/sdg
> pvcreate -- physical volume "/dev/sdg" successfully created
>
> jerry# vgcreate testVG1 /dev/sdf /dev/sdg
> vgcreate -- INFO: using default physical extent size 4.00 MB
> vgcreate -- INFO: maximum logical volume size is 255.99 Gigabyte
> vgcreate -- doing automatic backup of volume group "testVG1"
> vgcreate -- volume group "testVG1" successfully created and activated
>
> jerry# raw -qa
> /dev/raw/raw2: bound to major 8, minor 16
> /dev/raw/raw3: bound to major 8, minor 32
> /dev/raw/raw4: bound to major 8, minor 48
> /dev/raw/raw5: bound to major 8, minor 64
> /dev/raw/raw6: bound to major 8, minor 80
> /dev/raw/raw7: bound to major 8, minor 96
> /dev/raw/raw8: bound to major 8, minor 112
> /dev/raw/raw9: bound to major 8, minor 128
> jerry#
> jerry#
> jerry# vgchange -an testVG1
> vgchange -- volume group "testVG1" successfully deactivated
>
> jerry# raw -qa
> /dev/raw/raw2: bound to major 8, minor 16
> /dev/raw/raw3: bound to major 8, minor 32
> /dev/raw/raw4: bound to major 8, minor 48
> /dev/raw/raw5: bound to major 8, minor 64
> /dev/raw/raw6: bound to major 8, minor 80
> /dev/raw/raw7: bound to major 8, minor 96
> /dev/raw/raw8: bound to major 8, minor 112
> /dev/raw/raw9: bound to major 8, minor 128
> jerry#
> jerry#
> jerry# vgchange -ay testVG1
> vgchange -- volume group "testVG1" successfully activated
>
> jerry# raw -qa
> /dev/raw/raw2: bound to major 8, minor 16
> /dev/raw/raw3: bound to major 8, minor 32
> /dev/raw/raw4: bound to major 8, minor 48
> /dev/raw/raw5: bound to major 8, minor 64
> /dev/raw/raw6: bound to major 8, minor 96 <------ CHANGED/WRONG
> /dev/raw/raw7: bound to major 8, minor 80 <------ CHANGED/WRONG
> /dev/raw/raw8: bound to major 8, minor 112
> /dev/raw/raw9: bound to major 8, minor 128
> jerry#
> jerry#
> jerry# raw /dev/raw6 0 0
> Segmentation fault
>
> >>>>>>>>>> THIS APPEARED ON CONSOLE/SYSLOG >>>>>>>>>>>>>>>>>>
> Dec 19 15:53:32 jerry kernel: invalid operand: 0000
> Dec 19 15:53:32 jerry kernel: CPU: 0
> Dec 19 15:53:32 jerry kernel: EIP: 0010:[<c01396a2>] Not tainted
> Dec 19 15:53:32 jerry kernel: EFLAGS: 00010202
> Dec 19 15:53:32 jerry kernel: eax: 00000001 ebx: 000000d8 ecx: c1e72de8
> edx: 00000001
> Dec 19 15:53:32 jerry kernel: esi: c1e72de0 edi: c03f5880 ebp: f2e41f88
> esp: f2e41f60
> Dec 19 15:53:32 jerry kernel: ds: 0018 es: 0018 ss: 0018
> Dec 19 15:53:32 jerry kernel: Process raw (pid: 506, stackpage=f2e41000)
> Dec 19 15:53:32 jerry kernel: Stack: 000000d8 c03f5968 c03f5880 c0207f16
> c1e72de0 f3858d20 bffffcd0 0000ac00
> Dec 19 15:53:32 jerry kernel: ffffffe7 00000000 00000006 00000000
> 00000000 00000000 00000000 c01415a7
> Dec 19 15:53:32 jerry kernel: f638d920 f3858d20 0000ac00 bffffcd0
> f2e40000 bffffde4 bffffd1c 00000004
> Dec 19 15:53:32 jerry kernel: Call Trace: [<c0207f16>] [<c01415a7>]
> [<c0106d6f>]
> Dec 19 15:53:32 jerry kernel:
> Dec 19 15:53:32 jerry kernel: Code: 0f 0b 8b 56 04 8b 06 89 50 04 89 02 8b 5e
> 30 8d 46 30 39 c3
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>
> jerry#
> jerry#
> jerry# raw /dev/raw7 8 96
> >>>>>>>>>>>> SYSTEM LOCKED-UP COMPLETELY >>>>>>>>>>>>>>>>>>>
>
>
>
>
>
>
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf
Germany
Mauelshagen@Sistina.com +49 2626 141200
FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [linux-lvm] Problems binding raw devices to PV's
2001-12-20 14:05 ` Heinz J . Mauelshagen
@ 2001-12-20 14:14 ` Andrew Patterson
2002-01-15 9:17 ` Heinz J . Mauelshagen
0 siblings, 1 reply; 4+ messages in thread
From: Andrew Patterson @ 2001-12-20 14:14 UTC (permalink / raw)
To: linux-lvm
In your message on you write:
>
> Hi Andrew,
>
> I admit that the oops shouldn't happen but what's the use of binding
> raw devices to PVs anyway?
We are using this feature to monitor LUN's in a volume group to decide
whether to fail-over a server in a high-availabilty solution. We try
and read the PV header on a LUN to see if it has failed. To do this we
need raw access to bypass the buffer cache. Is there another way to
bypass the buffer-cache without using raw?
Andrew
>
> Regards,
> Heinz
>
> On Wed, Dec 19, 2001 at 05:54:12PM -0700, Andrew Patterson wrote:
> >
> > We are having problems when running vgchange to activate volume groups
> > that have raw devices bound to it's PV's. We are currently using
> > LVM 1.0.1-rc4 running on Linux kernel 2.4.14.
> >
> > Andrew
> >
> > Reproducing problem:
> > --------------------
> > 1. Establish raw device <--> scsi disk device bindings using raw
> > utility
> > 2. Create 1 vg with 2 pv's (problem not seen with only 1 pv)
> > 3. Deactivate vg with vgchange
> > 4. When you re-activate the vg with vgchange, something is corrupted
> > such that the raw mappings appear to have been changed.
> > 5. The next attempt to change back the raw binding causes segfault in
> > the raw utility, accompanied by a kernel stack trace on the
> > console/syslog
> > 6. The next attempt to change back the raw binding causes the system
> > to completely lock up/wedge.
> >
> > Capture showing problem:
> > ------------------------
> > jerry#
> > jerry#
> > jerry# raw /dev/raw2 8 16
> > /dev/raw/raw2: bound to major 8, minor 16
> > jerry# raw /dev/raw3 8 32
> > /dev/raw/raw3: bound to major 8, minor 32
> > jerry# raw /dev/raw3 8 48
> > /dev/raw/raw4: bound to major 8, minor 48
> > jerry# raw /dev/raw4 8 64
> > /dev/raw/raw5: bound to major 8, minor 64
> > jerry# raw /dev/raw5 8 80
> > /dev/raw/raw6: bound to major 8, minor 80
> > jerry# raw /dev/raw6 8 96
> > /dev/raw/raw7: bound to major 8, minor 96
> > jerry# raw /dev/raw8 8 112
> > /dev/raw/raw8: bound to major 8, minor 112
> > jerry# raw /dev/raw9 8 128
> > /dev/raw/raw9: bound to major 8, minor 128
> > jerry#
> > jerry#
> > jerry# raw -qa
> > /dev/raw/raw2: bound to major 8, minor 16
> > /dev/raw/raw3: bound to major 8, minor 32
> > /dev/raw/raw4: bound to major 8, minor 48
> > /dev/raw/raw5: bound to major 8, minor 64
> > /dev/raw/raw6: bound to major 8, minor 80
> > /dev/raw/raw7: bound to major 8, minor 96
> > /dev/raw/raw8: bound to major 8, minor 112
> > /dev/raw/raw9: bound to major 8, minor 128
> > jerry# pvcreate /dev/sdf
> > pvcreate -- physical volume "/dev/sdf" successfully created
> >
> > jerry# pvcreate /dev/sdg
> > pvcreate -- physical volume "/dev/sdg" successfully created
> >
> > jerry# vgcreate testVG1 /dev/sdf /dev/sdg
> > vgcreate -- INFO: using default physical extent size 4.00 MB
> > vgcreate -- INFO: maximum logical volume size is 255.99 Gigabyte
> > vgcreate -- doing automatic backup of volume group "testVG1"
> > vgcreate -- volume group "testVG1" successfully created and activated
> >
> > jerry# raw -qa
> > /dev/raw/raw2: bound to major 8, minor 16
> > /dev/raw/raw3: bound to major 8, minor 32
> > /dev/raw/raw4: bound to major 8, minor 48
> > /dev/raw/raw5: bound to major 8, minor 64
> > /dev/raw/raw6: bound to major 8, minor 80
> > /dev/raw/raw7: bound to major 8, minor 96
> > /dev/raw/raw8: bound to major 8, minor 112
> > /dev/raw/raw9: bound to major 8, minor 128
> > jerry#
> > jerry#
> > jerry# vgchange -an testVG1
> > vgchange -- volume group "testVG1" successfully deactivated
> >
> > jerry# raw -qa
> > /dev/raw/raw2: bound to major 8, minor 16
> > /dev/raw/raw3: bound to major 8, minor 32
> > /dev/raw/raw4: bound to major 8, minor 48
> > /dev/raw/raw5: bound to major 8, minor 64
> > /dev/raw/raw6: bound to major 8, minor 80
> > /dev/raw/raw7: bound to major 8, minor 96
> > /dev/raw/raw8: bound to major 8, minor 112
> > /dev/raw/raw9: bound to major 8, minor 128
> > jerry#
> > jerry#
> > jerry# vgchange -ay testVG1
> > vgchange -- volume group "testVG1" successfully activated
> >
> > jerry# raw -qa
> > /dev/raw/raw2: bound to major 8, minor 16
> > /dev/raw/raw3: bound to major 8, minor 32
> > /dev/raw/raw4: bound to major 8, minor 48
> > /dev/raw/raw5: bound to major 8, minor 64
> > /dev/raw/raw6: bound to major 8, minor 96 <------ CHANGED/WRONG
> > /dev/raw/raw7: bound to major 8, minor 80 <------ CHANGED/WRONG
> > /dev/raw/raw8: bound to major 8, minor 112
> > /dev/raw/raw9: bound to major 8, minor 128
> > jerry#
> > jerry#
> > jerry# raw /dev/raw6 0 0
> > Segmentation fault
> >
> > >>>>>>>>>> THIS APPEARED ON CONSOLE/SYSLOG >>>>>>>>>>>>>>>>>>
> > Dec 19 15:53:32 jerry kernel: invalid operand: 0000
> > Dec 19 15:53:32 jerry kernel: CPU: 0
> > Dec 19 15:53:32 jerry kernel: EIP: 0010:[<c01396a2>] Not tainted
> > Dec 19 15:53:32 jerry kernel: EFLAGS: 00010202
> > Dec 19 15:53:32 jerry kernel: eax: 00000001 ebx: 000000d8 ecx: c1e72de8
>
> > edx: 00000001
> > Dec 19 15:53:32 jerry kernel: esi: c1e72de0 edi: c03f5880 ebp: f2e41f88
>
> > esp: f2e41f60
> > Dec 19 15:53:32 jerry kernel: ds: 0018 es: 0018 ss: 0018
> > Dec 19 15:53:32 jerry kernel: Process raw (pid: 506, stackpage=f2e41000)
> > Dec 19 15:53:32 jerry kernel: Stack: 000000d8 c03f5968 c03f5880 c0207f16
> > c1e72de0 f3858d20 bffffcd0 0000ac00
> > Dec 19 15:53:32 jerry kernel: ffffffe7 00000000 00000006 00000000
> > 00000000 00000000 00000000 c01415a7
> > Dec 19 15:53:32 jerry kernel: f638d920 f3858d20 0000ac00 bffffcd0
> > f2e40000 bffffde4 bffffd1c 00000004
> > Dec 19 15:53:32 jerry kernel: Call Trace: [<c0207f16>] [<c01415a7>]
> > [<c0106d6f>]
> > Dec 19 15:53:32 jerry kernel:
> > Dec 19 15:53:32 jerry kernel: Code: 0f 0b 8b 56 04 8b 06 89 50 04 89 02 8b
> 5e
> > 30 8d 46 30 39 c3
> > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> >
> > jerry#
> > jerry#
> > jerry# raw /dev/raw7 8 96
> > >>>>>>>>>>>> SYSTEM LOCKED-UP COMPLETELY >>>>>>>>>>>>>>>>>>>
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm@sistina.com
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> -
>
> Heinz Mauelshagen Sistina Software Inc.
> Senior Consultant/Developer Am Sonnenhang 11
> 56242 Marienrachdorf
> Germany
> Mauelshagen@Sistina.com +49 2626 141200
> FAX 924446
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> -
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [linux-lvm] Problems binding raw devices to PV's
2001-12-20 14:14 ` Andrew Patterson
@ 2002-01-15 9:17 ` Heinz J . Mauelshagen
0 siblings, 0 replies; 4+ messages in thread
From: Heinz J . Mauelshagen @ 2002-01-15 9:17 UTC (permalink / raw)
To: linux-lvm
Andrew,
happy new year and sorry for this late answer.
On Thu, Dec 20, 2001 at 01:16:52PM -0700, Andrew Patterson wrote:
> In your message on you write:
> >
> > Hi Andrew,
> >
> > I admit that the oops shouldn't happen but what's the use of binding
> > raw devices to PVs anyway?
>
> We are using this feature to monitor LUN's in a volume group to decide
> whether to fail-over a server in a high-availabilty solution. We try
> and read the PV header on a LUN to see if it has failed. To do this we
> need raw access to bypass the buffer cache. Is there another way to
> bypass the buffer-cache without using raw?
No, not that I am aware of.
Heinz
>
> Andrew
>
> >
> > Regards,
> > Heinz
> >
> > On Wed, Dec 19, 2001 at 05:54:12PM -0700, Andrew Patterson wrote:
> > >
> > > We are having problems when running vgchange to activate volume groups
> > > that have raw devices bound to it's PV's. We are currently using
> > > LVM 1.0.1-rc4 running on Linux kernel 2.4.14.
> > >
> > > Andrew
> > >
> > > Reproducing problem:
> > > --------------------
> > > 1. Establish raw device <--> scsi disk device bindings using raw
> > > utility
> > > 2. Create 1 vg with 2 pv's (problem not seen with only 1 pv)
> > > 3. Deactivate vg with vgchange
> > > 4. When you re-activate the vg with vgchange, something is corrupted
> > > such that the raw mappings appear to have been changed.
> > > 5. The next attempt to change back the raw binding causes segfault in
> > > the raw utility, accompanied by a kernel stack trace on the
> > > console/syslog
> > > 6. The next attempt to change back the raw binding causes the system
> > > to completely lock up/wedge.
> > >
> > > Capture showing problem:
> > > ------------------------
> > > jerry#
> > > jerry#
> > > jerry# raw /dev/raw2 8 16
> > > /dev/raw/raw2: bound to major 8, minor 16
> > > jerry# raw /dev/raw3 8 32
> > > /dev/raw/raw3: bound to major 8, minor 32
> > > jerry# raw /dev/raw3 8 48
> > > /dev/raw/raw4: bound to major 8, minor 48
> > > jerry# raw /dev/raw4 8 64
> > > /dev/raw/raw5: bound to major 8, minor 64
> > > jerry# raw /dev/raw5 8 80
> > > /dev/raw/raw6: bound to major 8, minor 80
> > > jerry# raw /dev/raw6 8 96
> > > /dev/raw/raw7: bound to major 8, minor 96
> > > jerry# raw /dev/raw8 8 112
> > > /dev/raw/raw8: bound to major 8, minor 112
> > > jerry# raw /dev/raw9 8 128
> > > /dev/raw/raw9: bound to major 8, minor 128
> > > jerry#
> > > jerry#
> > > jerry# raw -qa
> > > /dev/raw/raw2: bound to major 8, minor 16
> > > /dev/raw/raw3: bound to major 8, minor 32
> > > /dev/raw/raw4: bound to major 8, minor 48
> > > /dev/raw/raw5: bound to major 8, minor 64
> > > /dev/raw/raw6: bound to major 8, minor 80
> > > /dev/raw/raw7: bound to major 8, minor 96
> > > /dev/raw/raw8: bound to major 8, minor 112
> > > /dev/raw/raw9: bound to major 8, minor 128
> > > jerry# pvcreate /dev/sdf
> > > pvcreate -- physical volume "/dev/sdf" successfully created
> > >
> > > jerry# pvcreate /dev/sdg
> > > pvcreate -- physical volume "/dev/sdg" successfully created
> > >
> > > jerry# vgcreate testVG1 /dev/sdf /dev/sdg
> > > vgcreate -- INFO: using default physical extent size 4.00 MB
> > > vgcreate -- INFO: maximum logical volume size is 255.99 Gigabyte
> > > vgcreate -- doing automatic backup of volume group "testVG1"
> > > vgcreate -- volume group "testVG1" successfully created and activated
> > >
> > > jerry# raw -qa
> > > /dev/raw/raw2: bound to major 8, minor 16
> > > /dev/raw/raw3: bound to major 8, minor 32
> > > /dev/raw/raw4: bound to major 8, minor 48
> > > /dev/raw/raw5: bound to major 8, minor 64
> > > /dev/raw/raw6: bound to major 8, minor 80
> > > /dev/raw/raw7: bound to major 8, minor 96
> > > /dev/raw/raw8: bound to major 8, minor 112
> > > /dev/raw/raw9: bound to major 8, minor 128
> > > jerry#
> > > jerry#
> > > jerry# vgchange -an testVG1
> > > vgchange -- volume group "testVG1" successfully deactivated
> > >
> > > jerry# raw -qa
> > > /dev/raw/raw2: bound to major 8, minor 16
> > > /dev/raw/raw3: bound to major 8, minor 32
> > > /dev/raw/raw4: bound to major 8, minor 48
> > > /dev/raw/raw5: bound to major 8, minor 64
> > > /dev/raw/raw6: bound to major 8, minor 80
> > > /dev/raw/raw7: bound to major 8, minor 96
> > > /dev/raw/raw8: bound to major 8, minor 112
> > > /dev/raw/raw9: bound to major 8, minor 128
> > > jerry#
> > > jerry#
> > > jerry# vgchange -ay testVG1
> > > vgchange -- volume group "testVG1" successfully activated
> > >
> > > jerry# raw -qa
> > > /dev/raw/raw2: bound to major 8, minor 16
> > > /dev/raw/raw3: bound to major 8, minor 32
> > > /dev/raw/raw4: bound to major 8, minor 48
> > > /dev/raw/raw5: bound to major 8, minor 64
> > > /dev/raw/raw6: bound to major 8, minor 96 <------ CHANGED/WRONG
> > > /dev/raw/raw7: bound to major 8, minor 80 <------ CHANGED/WRONG
> > > /dev/raw/raw8: bound to major 8, minor 112
> > > /dev/raw/raw9: bound to major 8, minor 128
> > > jerry#
> > > jerry#
> > > jerry# raw /dev/raw6 0 0
> > > Segmentation fault
> > >
> > > >>>>>>>>>> THIS APPEARED ON CONSOLE/SYSLOG >>>>>>>>>>>>>>>>>>
> > > Dec 19 15:53:32 jerry kernel: invalid operand: 0000
> > > Dec 19 15:53:32 jerry kernel: CPU: 0
> > > Dec 19 15:53:32 jerry kernel: EIP: 0010:[<c01396a2>] Not tainted
> > > Dec 19 15:53:32 jerry kernel: EFLAGS: 00010202
> > > Dec 19 15:53:32 jerry kernel: eax: 00000001 ebx: 000000d8 ecx: c1e72de8
> >
> > > edx: 00000001
> > > Dec 19 15:53:32 jerry kernel: esi: c1e72de0 edi: c03f5880 ebp: f2e41f88
> >
> > > esp: f2e41f60
> > > Dec 19 15:53:32 jerry kernel: ds: 0018 es: 0018 ss: 0018
> > > Dec 19 15:53:32 jerry kernel: Process raw (pid: 506, stackpage=f2e41000)
> > > Dec 19 15:53:32 jerry kernel: Stack: 000000d8 c03f5968 c03f5880 c0207f16
> > > c1e72de0 f3858d20 bffffcd0 0000ac00
> > > Dec 19 15:53:32 jerry kernel: ffffffe7 00000000 00000006 00000000
> > > 00000000 00000000 00000000 c01415a7
> > > Dec 19 15:53:32 jerry kernel: f638d920 f3858d20 0000ac00 bffffcd0
> > > f2e40000 bffffde4 bffffd1c 00000004
> > > Dec 19 15:53:32 jerry kernel: Call Trace: [<c0207f16>] [<c01415a7>]
> > > [<c0106d6f>]
> > > Dec 19 15:53:32 jerry kernel:
> > > Dec 19 15:53:32 jerry kernel: Code: 0f 0b 8b 56 04 8b 06 89 50 04 89 02 8b
> > 5e
> > > 30 8d 46 30 39 c3
> > > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> > >
> > > jerry#
> > > jerry#
> > > jerry# raw /dev/raw7 8 96
> > > >>>>>>>>>>>> SYSTEM LOCKED-UP COMPLETELY >>>>>>>>>>>>>>>>>>>
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > linux-lvm mailing list
> > > linux-lvm@sistina.com
> > > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
> >
> > linux-lvm mailing list
> > linux-lvm@sistina.com
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
>
>
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf
Germany
Mauelshagen@Sistina.com +49 2626 141200
FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2002-01-15 9:17 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2001-12-19 18:52 [linux-lvm] Problems binding raw devices to PV's Andrew Patterson
2001-12-20 14:05 ` Heinz J . Mauelshagen
2001-12-20 14:14 ` Andrew Patterson
2002-01-15 9:17 ` Heinz J . Mauelshagen
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