reiser4 ; regressions in 2.6.14-rc1-mm1

reiser4 ; regressions in 2.6.14-rc1-mm1

[Laurent Riffard]

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Hello,

In kernel 2.6.14-rc1-mm1, Reiser4 present 2 regressions with regard to 2.6.13-mm1 :

A) Suspend-to-disk does not work because the process "[ent:hda8]" can't be stopped. 

$ mount | grep hda8
/dev/hda8 on /home/laurent/kernel type reiser4 (rw,nosuid,nodev)

Extract of the log  :
Restarting tasks...<6> Strange, ent:hda8. not stopped

I have already mentioned this in another mail to this list, it was done with a modified 2.6.14-rc1-mm1 kernel from Andrew Morton (without the input subsystem changes) plus vm-swap_prefetch-8.patch. I can now confirm the regression on a plain 2.6.14-rc1-mm1 without any additional patch.

B) Can't mount a loop file on reiser4 :

[root@antares ~]# mount /mnt/diske
[root@antares ~]# mount | grep diske
/dev/hdb8 on /mnt/diske type reiser4 (rw,noexec,nosuid,nodev)
[root@antares ~]# cd /mnt/diske/laurent/download/Mandriva-Linux-2006-0.5/
[root@antares Mandriva-Linux-2006-0.5]# mount -t iso9660 -oloop,ro Mandriva-Linux-Free-2006-0.5-CD1.i586.iso /mnt/disk
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

If I copy this file to a reiser filesystem, I can mount it without any problem.

Feel free to ask for more details. 
~~
laurent


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Re: reiser4 ; regressions in 2.6.14-rc1-mm1

[David Masover]

Laurent Riffard wrote:

> A) Suspend-to-disk does not work because the process "[ent:hda8]" can't be stopped. 

Strange, this used to work.  Haven't had occasion to try it again 
lately, though.

> B) Can't mount a loop file on reiser4 :

I do this all the time, though not on the mm kernel.  ext3 loop file on 
a reiser4 disk, reiser4 loop file on a reiser4 disk.  Haven't tried 
reiser4 loop file on an ext3 fs.

Can anyone else confirm this?

Re: reiser4 ; regressions in 2.6.14-rc1-mm1

[Łukasz Mierzwa]

Dnia Tue, 20 Sep 2005 21:27:42 +0200, David Masover <ninja@slaphack.com> napisa³:

> Laurent Riffard wrote:
>
>> A) Suspend-to-disk does not work because the process "[ent:hda8]" can't be stopped.
>
> Strange, this used to work.  Haven't had occasion to try it again
> lately, though.
>
>> B) Can't mount a loop file on reiser4 :
>
> I do this all the time, though not on the mm kernel.  ext3 loop file on
> a reiser4 disk, reiser4 loop file on a reiser4 disk.  Haven't tried
> reiser4 loop file on an ext3 fs.
>
> Can anyone else confirm this?
>

ent:hda5 started to use 100% of cpu time on my system making it pretty ususable (under 2.6.14-rc1-mm1), reiser4 from 2.6.13-mm1 and 2.6.13-mm3 gave me kernel bugs on dcache. I went back to 2.6.12 + patch from namesys ftp (reiser4-for-2.6.12-3.patch.gz).

Re: reiser4 ; regressions in 2.6.14-rc1-mm1

[Hans Reiser]

Laurent Riffard wrote:

>
> Hello,
>
> In kernel 2.6.14-rc1-mm1, Reiser4 present 2 regressions with regard to
> 2.6.13-mm1 :
>
> A) Suspend-to-disk does not work because the process "[ent:hda8]"
> can't be stopped.
>
> $ mount | grep hda8
> /dev/hda8 on /home/laurent/kernel type reiser4 (rw,nosuid,nodev)
>
> Extract of the log  :
> Restarting tasks...<6> Strange, ent:hda8. not stopped
>
> I have already mentioned this in another mail to this list, it was
> done with a modified 2.6.14-rc1-mm1 kernel from Andrew Morton (without
> the input subsystem changes) plus vm-swap_prefetch-8.patch. I can now
> confirm the regression on a plain 2.6.14-rc1-mm1 without any
> additional patch.
>
> B) Can't mount a loop file on reiser4 :
>
> [root@antares ~]# mount /mnt/diske
> [root@antares ~]# mount | grep diske
> /dev/hdb8 on /mnt/diske type reiser4 (rw,noexec,nosuid,nodev)
> [root@antares ~]# cd /mnt/diske/laurent/download/Mandriva-Linux-2006-0.5/
> [root@antares Mandriva-Linux-2006-0.5]# mount -t iso9660 -oloop,ro
> Mandriva-Linux-Free-2006-0.5-CD1.i586.iso /mnt/disk
> mount: wrong fs type, bad option, bad superblock on /dev/loop0,
>        missing codepage or other error
>        In some cases useful info is found in syslog - try
>        dmesg | tail  or so
>
> If I copy this file to a reiser filesystem, I can mount it without any
> problem.
>
> Feel free to ask for more details.
> ~~
> laurent
>
>
Thanks laurent.  This latest reiser4 looks to be a bit of a turkey,
sorry for that.  It is slower also....

We will fix and......

Hans

Re: reiser4 ; regressions in 2.6.14-rc1-mm1

[Alexander Zarochentsev]

On Tuesday 20 September 2005 22:58, Laurent Riffard wrote:
> Hello,
>
> In kernel 2.6.14-rc1-mm1, Reiser4 present 2 regressions with regard to
> 2.6.13-mm1 :
>
> A) Suspend-to-disk does not work because the process "[ent:hda8]" can't be
> stopped.
>
> $ mount | grep hda8
> /dev/hda8 on /home/laurent/kernel type reiser4 (rw,nosuid,nodev)
>
> Extract of the log  :
> Restarting tasks...<6> Strange, ent:hda8. not stopped

would you please try to change fs/reiser4/entd.c:
----------------------------------------------
diff --git a/entd.c b/entd.c
--- a/entd.c
+++ b/entd.c
@@ -173,7 +173,7 @@ static int entd(void *arg)
 		{
 			DEFINE_WAIT(__wait);
 
-			for (;;) {
+			do {
 				prepare_to_wait(&ent->wait, &__wait, TASK_INTERRUPTIBLE);
 				if (kthread_should_stop()) {
 					done = 1;
@@ -182,7 +182,7 @@ static int entd(void *arg)
 				if (ent->nr_all_requests != 0)
 					break;
 				schedule();
-			}
+			} while (0);
 			finish_wait(&ent->wait, &__wait);
 		}
 	}
----------------------------------------------


>
> I have already mentioned this in another mail to this list, it was done
> with a modified 2.6.14-rc1-mm1 kernel from Andrew Morton (without the input
> subsystem changes) plus vm-swap_prefetch-8.patch. I can now confirm the
> regression on a plain 2.6.14-rc1-mm1 without any additional patch.
>
> B) Can't mount a loop file on reiser4 :
>
> [root@antares ~]# mount /mnt/diske
> [root@antares ~]# mount | grep diske
> /dev/hdb8 on /mnt/diske type reiser4 (rw,noexec,nosuid,nodev)
> [root@antares ~]# cd /mnt/diske/laurent/download/Mandriva-Linux-2006-0.5/
> [root@antares Mandriva-Linux-2006-0.5]# mount -t iso9660 -oloop,ro
> Mandriva-Linux-Free-2006-0.5-CD1.i586.iso /mnt/disk mount: wrong fs type,
> bad option, bad superblock on /dev/loop0,
>        missing codepage or other error
>        In some cases useful info is found in syslog - try
>        dmesg | tail  or so
>
> If I copy this file to a reiser filesystem, I can mount it without any
> problem.
>
> Feel free to ask for more details.
> ~~
> laurent

Re: reiser4 ; regressions in 2.6.14-rc1-mm1

[Laurent Riffard]

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Le 24.09.2005 21:11, Alexander Zarochentsev a écrit :
> On Tuesday 20 September 2005 22:58, Laurent Riffard wrote:
> 
>>Hello,
>>
>>In kernel 2.6.14-rc1-mm1, Reiser4 present 2 regressions with regard to
>>2.6.13-mm1 :
>>
>>A) Suspend-to-disk does not work because the process "[ent:hda8]" can't be
>>stopped.
>>
>>$ mount | grep hda8
>>/dev/hda8 on /home/laurent/kernel type reiser4 (rw,nosuid,nodev)
>>
>>Extract of the log  :
>>Restarting tasks...<6> Strange, ent:hda8. not stopped
> 
> 
> would you please try to change fs/reiser4/entd.c:
> ----------------------------------------------
> diff --git a/entd.c b/entd.c
> --- a/entd.c
> +++ b/entd.c
> @@ -173,7 +173,7 @@ static int entd(void *arg)
>  		{
>  			DEFINE_WAIT(__wait);
>  
> -			for (;;) {
> +			do {
>  				prepare_to_wait(&ent->wait, &__wait, TASK_INTERRUPTIBLE);
>  				if (kthread_should_stop()) {
>  					done = 1;
> @@ -182,7 +182,7 @@ static int entd(void *arg)
>  				if (ent->nr_all_requests != 0)
>  					break;
>  				schedule();
> -			}
> +			} while (0);
>  			finish_wait(&ent->wait, &__wait);
>  		}
>  	}
> ----------------------------------------------

No luck, 2.6.14-rc2-mm1 with the above patch still does not work. 

Extract from the log:
	Stopping tasks: ===============
	 stopping tasks failed (1 tasks remaining)
	Restarting tasks...<6> Strange, ent:hda8. not stopped
	 done

>>I have already mentioned this in another mail to this list, it was done
>>with a modified 2.6.14-rc1-mm1 kernel from Andrew Morton (without the input
>>subsystem changes) plus vm-swap_prefetch-8.patch. I can now confirm the
>>regression on a plain 2.6.14-rc1-mm1 without any additional patch.
>>
>>B) Can't mount a loop file on reiser4 :
>>
>>[root@antares ~]# mount /mnt/diske
>>[root@antares ~]# mount | grep diske
>>/dev/hdb8 on /mnt/diske type reiser4 (rw,noexec,nosuid,nodev)
>>[root@antares ~]# cd /mnt/diske/laurent/download/Mandriva-Linux-2006-0.5/
>>[root@antares Mandriva-Linux-2006-0.5]# mount -t iso9660 -oloop,ro
>>Mandriva-Linux-Free-2006-0.5-CD1.i586.iso /mnt/disk mount: wrong fs type,
>>bad option, bad superblock on /dev/loop0,
>>       missing codepage or other error
>>       In some cases useful info is found in syslog - try
>>       dmesg | tail  or so
>>
>>If I copy this file to a reiser filesystem, I can mount it without any
>>problem.

BTW, this one still occurs in 2.6.14-rc2-mm1.

~~ 
laurent



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Re: reiser4 ; regressions in 2.6.14-rc1-mm1

[Laurent Riffard]

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Hash: SHA1

Le 25.09.2005 14:59, Laurent Riffard a écrit :
> 
> Le 24.09.2005 21:11, Alexander Zarochentsev a écrit :
> 
>>>On Tuesday 20 September 2005 22:58, Laurent Riffard wrote:
>>>
>>>
>>>>Hello,
>>>>
>>>>In kernel 2.6.14-rc1-mm1, Reiser4 present 2 regressions with regard to
>>>>2.6.13-mm1 :
>>>>
>>>>A) Suspend-to-disk does not work because the process "[ent:hda8]" can't be
>>>>stopped.
>>>>
[snip]
>>>>
>>>>B) Can't mount a loop file on reiser4 :
>>>>
[snip]

Good news : these 2 regressions are fixed in 2.6.14-rc2-mm2.

thanks, reiserfs team
~~
laurent
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