* Fallback to scanning OF tree if no devaliases
@ 2010-07-29 6:21 Doug Nazar
2010-07-29 15:36 ` Lennart Sorensen
2010-08-01 14:48 ` Vladimir 'φ-coder/phcoder' Serbinenko
0 siblings, 2 replies; 14+ messages in thread
From: Doug Nazar @ 2010-07-29 6:21 UTC (permalink / raw)
To: grub-devel, Lennart Sorensen
[-- Attachment #1: Type: text/plain, Size: 741 bytes --]
Lennart, try giving this patch a whirl. In the case after we scan the
aliases list and we haven't found any block devices it will now try to
scan the entire tree. It kinda worked under OpenBios although I ran into
another bug where it can't open a device path that it gave me for the
pci ide controller. It found the other 2 drives fine.
I think this maintains the correct balance of using short pretty names
if available but working if they are not available.
There is a case where it will mess up however. If you only specify an
alias for one device but need another device to build a raid or lvm it
will fail. Although, thinking about it, this already would happen.
As always, you can specify the either path manually.
Doug
[-- Attachment #2: grub-fallback-to-scanning-of-tree.diff --]
[-- Type: text/plain, Size: 922 bytes --]
=== modified file 'disk/ieee1275/ofdisk.c'
--- disk/ieee1275/ofdisk.c 2010-07-29 03:58:16 +0000
+++ disk/ieee1275/ofdisk.c 2010-07-29 06:02:06 +0000
@@ -76,6 +76,9 @@
grub_ofdisk_iterate (int (*hook) (const char *name))
{
auto int dev_iterate (struct grub_ieee1275_devalias *alias);
+ int disks_found = 0;
+ int use_path = 0;
+ int result;
int dev_iterate (struct grub_ieee1275_devalias *alias)
{
@@ -110,11 +113,20 @@
if (! grub_strcmp (alias->type, "block") &&
grub_strncmp (alias->name, "cdrom", 5))
- ret = hook (alias->name);
+ {
+ disks_found++;
+ ret = hook (use_path ? alias->path : alias->name);
+ }
return ret;
}
- return grub_devalias_iterate (dev_iterate);
+ result = grub_devalias_iterate (dev_iterate);
+ if (!disks_found)
+ {
+ use_path = 1;
+ result = grub_ieee1275_devices_iterate (dev_iterate);
+ }
+ return result;
}
static char *
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 6:21 Fallback to scanning OF tree if no devaliases Doug Nazar
@ 2010-07-29 15:36 ` Lennart Sorensen
2010-07-29 15:57 ` Doug Nazar
2010-07-29 17:08 ` Doug Nazar
2010-08-01 14:48 ` Vladimir 'φ-coder/phcoder' Serbinenko
1 sibling, 2 replies; 14+ messages in thread
From: Lennart Sorensen @ 2010-07-29 15:36 UTC (permalink / raw)
To: Doug Nazar; +Cc: grub-devel, Lennart Sorensen
On Thu, Jul 29, 2010 at 02:21:36AM -0400, Doug Nazar wrote:
> Lennart, try giving this patch a whirl. In the case after we scan the
> aliases list and we haven't found any block devices it will now try to
> scan the entire tree. It kinda worked under OpenBios although I ran into
> another bug where it can't open a device path that it gave me for the
> pci ide controller. It found the other 2 drives fine.
>
> I think this maintains the correct balance of using short pretty names
> if available but working if they are not available.
>
> There is a case where it will mess up however. If you only specify an
> alias for one device but need another device to build a raid or lvm it
> will fail. Although, thinking about it, this already would happen.
>
> As always, you can specify the either path manually.
>
> Doug
>
> === modified file 'disk/ieee1275/ofdisk.c'
> --- disk/ieee1275/ofdisk.c 2010-07-29 03:58:16 +0000
> +++ disk/ieee1275/ofdisk.c 2010-07-29 06:02:06 +0000
> @@ -76,6 +76,9 @@
> grub_ofdisk_iterate (int (*hook) (const char *name))
> {
> auto int dev_iterate (struct grub_ieee1275_devalias *alias);
> + int disks_found = 0;
> + int use_path = 0;
> + int result;
>
> int dev_iterate (struct grub_ieee1275_devalias *alias)
> {
> @@ -110,11 +113,20 @@
>
> if (! grub_strcmp (alias->type, "block") &&
> grub_strncmp (alias->name, "cdrom", 5))
> - ret = hook (alias->name);
> + {
> + disks_found++;
> + ret = hook (use_path ? alias->path : alias->name);
> + }
> return ret;
> }
>
> - return grub_devalias_iterate (dev_iterate);
> + result = grub_devalias_iterate (dev_iterate);
> + if (!disks_found)
> + {
> + use_path = 1;
> + result = grub_ieee1275_devices_iterate (dev_iterate);
> + }
> + return result;
> }
>
> static char *
>
I removed the nvalias's and got:
0 > boot /pci@800000020000200/pci1014,02BD@1/sas/disk@20000 |
Elapsed time since release of system processors: 7 mins 55 secs
Welcome to GRUB!
Detected bad memory access to address: 727461736261739d
Package path = /packages/gscsi/disk
Loc-code =
Return Stack Trace
------------------
@ - c3e530
find-method - c48b9c
(poplocals) - c3c9e8
$call-method - c48c54
(poplocals) - c3c9e8
$CALL-R/W-DEV - d54a70
(EXEC) - d54d24
EXECUTE-COMMAND - d54db4
RETRY-COMMAND - d55ca4
INQUIRY - d55fd0
SCSI-DEVICE-TYPE - d5672c
catch - c3aff0
$call-method - c48c78
(poplocals) - c3c9e8
$call-parent - c48e98
SCSI-DEVICE-TYPE - d56df4
OPEN - d58200
catch - c3aff0
$call-method - c48c78
(poplocals) - c3c9e8
Detected bad memory access to address: 727461736261739d
Package path = /packages/gscsi/disk
Loc-code =
Return Stack Trace
------------------
@ - c3e530
find-method - c48b9c
(poplocals) - c3c9e8
$call-method - c48c54
(poplocals) - c3c9e8
$CALL-R/W-DEV - d54a70
(EXEC) - d54d24
EXECUTE-COMMAND - d54db4
RETRY-COMMAND - d55ca4
INQUIRY - d55fd0
SCSI-DEVICE-TYPE - d5672c
catch - c3aff0
$call-method - c48c78
(poplocals) - c3c9e8
$call-parent - c48e98
SCSI-DEVICE-TYPE - d56df4
OPEN - d58200
catch - c3aff0
$call-method - c48c78
(poplocals) - c3c9e8
diskOPEN: can't find hw device
diskOPEN: can't find hw device
error: no such disk.
Entering rescue mode...
grub rescue>
Any idea what went wrong?
--
Len Sorensen
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 15:36 ` Lennart Sorensen
@ 2010-07-29 15:57 ` Doug Nazar
2010-07-29 16:52 ` David Miller
2010-07-29 16:57 ` Lennart Sorensen
2010-07-29 17:08 ` Doug Nazar
1 sibling, 2 replies; 14+ messages in thread
From: Doug Nazar @ 2010-07-29 15:57 UTC (permalink / raw)
To: Lennart Sorensen; +Cc: grub-devel
On 2010-07-29 11:36 AM, Lennart Sorensen wrote:
>
> I removed the nvalias's and got:
>
> 0> boot /pci@800000020000200/pci1014,02BD@1/sas/disk@20000 |
I'm guessing the ',' throws everything for a loop. Grub is probably
interpreting it as a partition. Interesting little quirk. Have to think
about how to handle that. Escaping is probably too intrusive. I guess
substitution or abandon the idea.
How common is it not to have nvalias's? Is that usual operating procedure?
Doug
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 15:57 ` Doug Nazar
@ 2010-07-29 16:52 ` David Miller
2010-07-29 16:59 ` Lennart Sorensen
2010-07-29 16:57 ` Lennart Sorensen
1 sibling, 1 reply; 14+ messages in thread
From: David Miller @ 2010-07-29 16:52 UTC (permalink / raw)
To: grub-devel, nazard.michi; +Cc: lsorense
From: Doug Nazar <nazard.michi@gmail.com>
Date: Thu, 29 Jul 2010 11:57:50 -0400
> How common is it not to have nvalias's? Is that usual operating
> procedure?
FWIW, I've never seen this on a sparc64 system, ever.
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 16:52 ` David Miller
@ 2010-07-29 16:59 ` Lennart Sorensen
2010-07-29 17:28 ` David Miller
0 siblings, 1 reply; 14+ messages in thread
From: Lennart Sorensen @ 2010-07-29 16:59 UTC (permalink / raw)
To: David Miller; +Cc: grub-devel, lsorense, nazard.michi
On Thu, Jul 29, 2010 at 09:52:18AM -0700, David Miller wrote:
> From: Doug Nazar <nazard.michi@gmail.com>
> Date: Thu, 29 Jul 2010 11:57:50 -0400
>
> > How common is it not to have nvalias's? Is that usual operating
> > procedure?
>
> FWIW, I've never seen this on a sparc64 system, ever.
So the sparc does not have devaliases by default and people don't
normally use them, or the sparc (like the powermac) automatically
creates useful devalises?
--
Len Sorensen
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 16:59 ` Lennart Sorensen
@ 2010-07-29 17:28 ` David Miller
0 siblings, 0 replies; 14+ messages in thread
From: David Miller @ 2010-07-29 17:28 UTC (permalink / raw)
To: lsorense; +Cc: grub-devel, nazard.michi
From: lsorense@csclub.uwaterloo.ca (Lennart Sorensen)
Date: Thu, 29 Jul 2010 12:59:08 -0400
> On Thu, Jul 29, 2010 at 09:52:18AM -0700, David Miller wrote:
>> From: Doug Nazar <nazard.michi@gmail.com>
>> Date: Thu, 29 Jul 2010 11:57:50 -0400
>>
>> > How common is it not to have nvalias's? Is that usual operating
>> > procedure?
>>
>> FWIW, I've never seen this on a sparc64 system, ever.
>
> So the sparc does not have devaliases by default and people don't
> normally use them, or the sparc (like the powermac) automatically
> creates useful devalises?
Sparc64 always has useful aliases.
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 15:57 ` Doug Nazar
2010-07-29 16:52 ` David Miller
@ 2010-07-29 16:57 ` Lennart Sorensen
1 sibling, 0 replies; 14+ messages in thread
From: Lennart Sorensen @ 2010-07-29 16:57 UTC (permalink / raw)
To: Doug Nazar; +Cc: grub-devel, Lennart Sorensen
On Thu, Jul 29, 2010 at 11:57:50AM -0400, Doug Nazar wrote:
> I'm guessing the ',' throws everything for a loop. Grub is probably
> interpreting it as a partition. Interesting little quirk. Have to think
> about how to handle that. Escaping is probably too intrusive. I guess
> substitution or abandon the idea.
>
> How common is it not to have nvalias's? Is that usual operating procedure?
As far as I can tell, on an IBM it is not normally done, although you can.
I am personally fine having to do it to get the box working, which it
now does. Everything else currently works (well except grub-install
which is currently clueless about IBM machines, but I filled a bug with
details on that).
--
Len Sorensen
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 15:36 ` Lennart Sorensen
2010-07-29 15:57 ` Doug Nazar
@ 2010-07-29 17:08 ` Doug Nazar
2010-07-29 17:37 ` Lennart Sorensen
1 sibling, 1 reply; 14+ messages in thread
From: Doug Nazar @ 2010-07-29 17:08 UTC (permalink / raw)
To: Lennart Sorensen; +Cc: grub-devel
[-- Attachment #1: Type: text/plain, Size: 458 bytes --]
On 2010-07-29 11:36 AM, Lennart Sorensen wrote:
>
> I removed the nvalias's and got:
>
> 0> boot /pci@800000020000200/pci1014,02BD@1/sas/disk@20000 |
Can you add this on top? Grub already has support to escape the commas.
Just needed to actually do it. I can't really test it here but it didn't
break anything.
I'll let you guys decide if we should actually do this or not although
I'm of the philosophy of "it should just work, damn it". :-)
Doug
[-- Attachment #2: grub-escape-of-path.diff --]
[-- Type: text/plain, Size: 1178 bytes --]
=== modified file 'disk/ieee1275/ofdisk.c'
--- disk/ieee1275/ofdisk.c 2010-07-29 06:04:55 +0000
+++ disk/ieee1275/ofdisk.c 2010-07-29 17:00:01 +0000
@@ -72,6 +72,39 @@
return p;
}
+static char *
+escape_of_path (const char *orig_path)
+{
+ char *new_path, *d, c;
+ const char *p;
+ int i;
+
+ if (!grub_strchr (orig_path, ','))
+ return (char *) orig_path;
+
+ new_path = grub_malloc (grub_strlen (orig_path) + 32);
+
+ p = orig_path;
+ d = new_path;
+ i = 0;
+ while ((c = *p++) != '\0')
+ {
+ if (c == ',')
+ {
+ if (++i == 32)
+ {
+ /* oops, too many commas */
+ break;
+ }
+ *d++ = '\\';
+ }
+ *d++ = c;
+ }
+
+ return new_path;
+}
+
+
static int
grub_ofdisk_iterate (int (*hook) (const char *name))
{
@@ -114,8 +147,11 @@
if (! grub_strcmp (alias->type, "block") &&
grub_strncmp (alias->name, "cdrom", 5))
{
+ char *name_path = use_path ? escape_of_path(alias->path) : alias->name;
disks_found++;
- ret = hook (use_path ? alias->path : alias->name);
+ ret = hook (name_path);
+ if (use_path && name_path != alias->path)
+ grub_free(name_path);
}
return ret;
}
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 17:08 ` Doug Nazar
@ 2010-07-29 17:37 ` Lennart Sorensen
2010-07-29 19:11 ` Doug Nazar
0 siblings, 1 reply; 14+ messages in thread
From: Lennart Sorensen @ 2010-07-29 17:37 UTC (permalink / raw)
To: The development of GNU GRUB; +Cc: Lennart Sorensen
On Thu, Jul 29, 2010 at 01:08:15PM -0400, Doug Nazar wrote:
> On 2010-07-29 11:36 AM, Lennart Sorensen wrote:
>>
>> I removed the nvalias's and got:
>>
>> 0> boot /pci@800000020000200/pci1014,02BD@1/sas/disk@20000 |
>
> Can you add this on top? Grub already has support to escape the commas.
> Just needed to actually do it. I can't really test it here but it didn't
> break anything.
>
> I'll let you guys decide if we should actually do this or not although
> I'm of the philosophy of "it should just work, damn it". :-)
I will try to test it soon, but I just put the machine into production
use, so rebooting a lot won't be popular. I will try to test it in
the evening. Unfortunately I am going on vacation for a week, so it
probably won't be until after that.
Thanks for trying to fix it though.
--
Len Sorensen
> === modified file 'disk/ieee1275/ofdisk.c'
> --- disk/ieee1275/ofdisk.c 2010-07-29 06:04:55 +0000
> +++ disk/ieee1275/ofdisk.c 2010-07-29 17:00:01 +0000
> @@ -72,6 +72,39 @@
> return p;
> }
>
> +static char *
> +escape_of_path (const char *orig_path)
> +{
> + char *new_path, *d, c;
> + const char *p;
> + int i;
> +
> + if (!grub_strchr (orig_path, ','))
> + return (char *) orig_path;
> +
> + new_path = grub_malloc (grub_strlen (orig_path) + 32);
> +
> + p = orig_path;
> + d = new_path;
> + i = 0;
> + while ((c = *p++) != '\0')
> + {
> + if (c == ',')
> + {
> + if (++i == 32)
> + {
> + /* oops, too many commas */
> + break;
> + }
> + *d++ = '\\';
> + }
> + *d++ = c;
> + }
> +
> + return new_path;
> +}
> +
> +
> static int
> grub_ofdisk_iterate (int (*hook) (const char *name))
> {
> @@ -114,8 +147,11 @@
> if (! grub_strcmp (alias->type, "block") &&
> grub_strncmp (alias->name, "cdrom", 5))
> {
> + char *name_path = use_path ? escape_of_path(alias->path) : alias->name;
> disks_found++;
> - ret = hook (use_path ? alias->path : alias->name);
> + ret = hook (name_path);
> + if (use_path && name_path != alias->path)
> + grub_free(name_path);
> }
> return ret;
> }
>
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 17:37 ` Lennart Sorensen
@ 2010-07-29 19:11 ` Doug Nazar
0 siblings, 0 replies; 14+ messages in thread
From: Doug Nazar @ 2010-07-29 19:11 UTC (permalink / raw)
To: grub-devel
On 2010-07-29 1:37 PM, Lennart Sorensen wrote:
> I will try to test it soon, but I just put the machine into production
> use, so rebooting a lot won't be popular. I will try to test it in
> the evening. Unfortunately I am going on vacation for a week, so it
> probably won't be until after that.
>
> Thanks for trying to fix it though.
>
No problem. I was having fun..... :-)
I'm gonna try hacking on OpenBios for a bit. I should be able to get an
older version working and then I can fix a few annoying things and I'll
be able to inject a comma into a devpath as a test. However I don't know
if that's what was in fact crashing your box.
Doug
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fallback to scanning OF tree if no devaliases
2010-07-29 6:21 Fallback to scanning OF tree if no devaliases Doug Nazar
2010-07-29 15:36 ` Lennart Sorensen
@ 2010-08-01 14:48 ` Vladimir 'φ-coder/phcoder' Serbinenko
2010-08-09 15:41 ` Lennart Sorensen
1 sibling, 1 reply; 14+ messages in thread
From: Vladimir 'φ-coder/phcoder' Serbinenko @ 2010-08-01 14:48 UTC (permalink / raw)
To: grub-devel
[-- Attachment #1: Type: text/plain, Size: 1699 bytes --]
As I already told on IRC such a behaviour isn't of a good design. A
simple example is when one add a devalias and then all other disks
disappear. Moreover in experimental branch I have a solution for such a
problem: we scan all the devices and then show only the simpliest form.
That code just needs some testing. Could you do that? I'm sorry for not
having been available for last few days and this resulted in a mountain
of useless work by Doug and Lennart. I assume that the rest of this
thread is a discussion of this issue and is moot given the code which is
already in experimental. If it's not a case please start a new thread
per issue
On 07/29/2010 08:21 AM, Doug Nazar wrote:
> Lennart, try giving this patch a whirl. In the case after we scan the
> aliases list and we haven't found any block devices it will now try to
> scan the entire tree. It kinda worked under OpenBios although I ran
> into another bug where it can't open a device path that it gave me for
> the pci ide controller. It found the other 2 drives fine.
>
> I think this maintains the correct balance of using short pretty names
> if available but working if they are not available.
>
> There is a case where it will mess up however. If you only specify an
> alias for one device but need another device to build a raid or lvm it
> will fail. Although, thinking about it, this already would happen.
>
> As always, you can specify the either path manually.
>
> Doug
>
>
> _______________________________________________
> Grub-devel mailing list
> Grub-devel@gnu.org
> http://lists.gnu.org/mailman/listinfo/grub-devel
>
--
Regards
Vladimir 'φ-coder/phcoder' Serbinenko
[-- Attachment #2: OpenPGP digital signature --]
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fallback to scanning OF tree if no devaliases
2010-08-01 14:48 ` Vladimir 'φ-coder/phcoder' Serbinenko
@ 2010-08-09 15:41 ` Lennart Sorensen
2010-08-09 16:09 ` Vladimir 'φ-coder/phcoder' Serbinenko
0 siblings, 1 reply; 14+ messages in thread
From: Lennart Sorensen @ 2010-08-09 15:41 UTC (permalink / raw)
To: The development of GNU GRUB
On Sun, Aug 01, 2010 at 04:48:04PM +0200, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
> As I already told on IRC such a behaviour isn't of a good design. A
> simple example is when one add a devalias and then all other disks
> disappear. Moreover in experimental branch I have a solution for such a
> problem: we scan all the devices and then show only the simpliest form.
> That code just needs some testing. Could you do that? I'm sorry for not
> having been available for last few days and this resulted in a mountain
> of useless work by Doug and Lennart. I assume that the rest of this
> thread is a discussion of this issue and is moot given the code which is
> already in experimental. If it's not a case please start a new thread
> per issue
Where do I find that? I would love to test it.
I currently have the machine down because someone made a mistake that
killed the box (or so they thought). Nothing actually wrong with the
box fortunately, but it means I can spend a few hours testing things
before getting back to normal use again.
--
Len Sorensen
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fallback to scanning OF tree if no devaliases
2010-08-09 15:41 ` Lennart Sorensen
@ 2010-08-09 16:09 ` Vladimir 'φ-coder/phcoder' Serbinenko
2010-08-09 17:01 ` Lennart Sorensen
0 siblings, 1 reply; 14+ messages in thread
From: Vladimir 'φ-coder/phcoder' Serbinenko @ 2010-08-09 16:09 UTC (permalink / raw)
To: grub-devel
[-- Attachment #1: Type: text/plain, Size: 1408 bytes --]
On 08/09/2010 05:41 PM, Lennart Sorensen wrote:
> On Sun, Aug 01, 2010 at 04:48:04PM +0200, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
>
>> As I already told on IRC such a behaviour isn't of a good design. A
>> simple example is when one add a devalias and then all other disks
>> disappear. Moreover in experimental branch I have a solution for such a
>> problem: we scan all the devices and then show only the simpliest form.
>> That code just needs some testing. Could you do that? I'm sorry for not
>> having been available for last few days and this resulted in a mountain
>> of useless work by Doug and Lennart. I assume that the rest of this
>> thread is a discussion of this issue and is moot given the code which is
>> already in experimental. If it's not a case please start a new thread
>> per issue
>>
> Where do I find that? I would love to test it.
>
>
BZR checkout from http://bzr.savannah.gnu.org/r/grub/branches/experimental/
I'm especially interested in testing on multi-disk config (both my OFW
boxes have only one disk)
> I currently have the machine down because someone made a mistake that
> killed the box (or so they thought). Nothing actually wrong with the
> box fortunately, but it means I can spend a few hours testing things
> before getting back to normal use again.
>
>
--
Regards
Vladimir 'φ-coder/phcoder' Serbinenko
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 294 bytes --]
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2010-08-09 17:01 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-07-29 6:21 Fallback to scanning OF tree if no devaliases Doug Nazar
2010-07-29 15:36 ` Lennart Sorensen
2010-07-29 15:57 ` Doug Nazar
2010-07-29 16:52 ` David Miller
2010-07-29 16:59 ` Lennart Sorensen
2010-07-29 17:28 ` David Miller
2010-07-29 16:57 ` Lennart Sorensen
2010-07-29 17:08 ` Doug Nazar
2010-07-29 17:37 ` Lennart Sorensen
2010-07-29 19:11 ` Doug Nazar
2010-08-01 14:48 ` Vladimir 'φ-coder/phcoder' Serbinenko
2010-08-09 15:41 ` Lennart Sorensen
2010-08-09 16:09 ` Vladimir 'φ-coder/phcoder' Serbinenko
2010-08-09 17:01 ` Lennart Sorensen
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