Re: [PATCH 00/18] ide: warm-plug support for IDE devices and other goodies

2008-02-13 Thread Gabriel Paubert
On Tue, Feb 12, 2008 at 01:30:03PM +0100, Gabriel Paubert wrote:
 On Tue, Feb 12, 2008 at 12:49:05PM +0100, Gabriel Paubert wrote:
  On Fri, Feb 08, 2008 at 07:40:43PM +1100, Benjamin Herrenschmidt wrote:
   
   On Fri, 2008-02-08 at 01:44 +0100, Bartlomiej Zolnierkiewicz wrote:
- couple of fixes and preparatory patches

- rework of PowerMac media-bay support ([un]register IDE devices 
instead of
  [un]registering IDE interface) [ it is the main reason for spamming 
PPC ML ]
   
   Interesting... I was thinking about doing a full remove of the device at
   a higher level instead but I suppose what you propose is easier.
  
  Well, I have serious problem on a Pegasos which appeared some time
  between 2.6.24 and 2.6.25-rc1: at boot I get an infinite string of 
  
  hdb: empty DMA table?
  
  I'm trying to bisect it right now.
 
 Argh, the first bisect point ended up with timeouts on hdb...
 
 Flagged as bad, to try to see when the problems started, but 
 I suspect that there are several.

Well, it's worse than this. After 7 or 8 bisections (all flagged
bad) the symptoms changed: the system boots up to the point where
it does not recognize LVM volumes. So there are at least 3 bugs:
1) the timeout on interrupts (only seen on hdb)
2) the empty DMA table messages (seen on hda and hdb)
3) the inability to see logical volumes (pvs does not find them,
  they are back when rebooting into 2.6.24). This is the apparently
  the earliest introduced bug (no problems with the disks with that
  version).

I am away from that machine until next Tuesday. IIRC the last git
bisect was something like 160 revisions left.

Gabriel

 
   Gabriel
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Re: [PATCH 00/18] ide: warm-plug support for IDE devices and other goodies

2008-02-12 Thread Bartlomiej Zolnierkiewicz
On Tuesday 12 February 2008, Benjamin Herrenschmidt wrote:
 
 On Fri, 2008-02-08 at 19:40 +1100, Benjamin Herrenschmidt wrote:
  On Fri, 2008-02-08 at 01:44 +0100, Bartlomiej Zolnierkiewicz wrote:
   - couple of fixes and preparatory patches
   
   - rework of PowerMac media-bay support ([un]register IDE devices instead 
   of
 [un]registering IDE interface) [ it is the main reason for spamming PPC 
   ML ]
  
  Interesting... I was thinking about doing a full remove of the device at
  a higher level instead but I suppose what you propose is easier.
  
  I'll have a look  test next week hopefully.
 
 Also, the above would have the advantage of not relying on drivers/ide
 infrastructure, and thus working with libata (once somebody has ported
 pmac ide to libata).

Neither of these things exist at the moment so lets stick to the existing
code which is scheduled for 2.6.26 and which finally allows removal of ppc
specific ide hacks from arch/{powerpc,ppc} (500 LOC gone, patches to be
posted this week), not to mention other nice changes in the future...

Thanks,
Bart
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Re: [PATCH 00/18] ide: warm-plug support for IDE devices and other goodies

2008-02-12 Thread Benjamin Herrenschmidt

On Fri, 2008-02-08 at 19:40 +1100, Benjamin Herrenschmidt wrote:
 On Fri, 2008-02-08 at 01:44 +0100, Bartlomiej Zolnierkiewicz wrote:
  - couple of fixes and preparatory patches
  
  - rework of PowerMac media-bay support ([un]register IDE devices instead of
[un]registering IDE interface) [ it is the main reason for spamming PPC 
  ML ]
 
 Interesting... I was thinking about doing a full remove of the device at
 a higher level instead but I suppose what you propose is easier.
 
 I'll have a look  test next week hopefully.

Also, the above would have the advantage of not relying on drivers/ide
infrastructure, and thus working with libata (once somebody has ported
pmac ide to libata).

Ben.


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Re: [PATCH 00/18] ide: warm-plug support for IDE devices and other goodies

2008-02-12 Thread Benjamin Herrenschmidt

On Tue, 2008-02-12 at 12:49 +0100, Gabriel Paubert wrote:
 On Fri, Feb 08, 2008 at 07:40:43PM +1100, Benjamin Herrenschmidt wrote:
  
  On Fri, 2008-02-08 at 01:44 +0100, Bartlomiej Zolnierkiewicz wrote:
   - couple of fixes and preparatory patches
   
   - rework of PowerMac media-bay support ([un]register IDE devices instead 
   of
 [un]registering IDE interface) [ it is the main reason for spamming PPC 
   ML ]
  
  Interesting... I was thinking about doing a full remove of the device at
  a higher level instead but I suppose what you propose is easier.
 
 Well, I have serious problem on a Pegasos which appeared some time
 between 2.6.24 and 2.6.25-rc1: at boot I get an infinite string of 
 
 hdb: empty DMA table?
 
 I'm trying to bisect it right now.

Pegasos doesn't use the pmac ide which is what we were discussing. It
uses a VIA IDE which uses a normal PRD table. So something else must
have broken...

Ben.


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Re: [PATCH 00/18] ide: warm-plug support for IDE devices and other goodies

2008-02-12 Thread Gabriel Paubert
On Fri, Feb 08, 2008 at 07:40:43PM +1100, Benjamin Herrenschmidt wrote:
 
 On Fri, 2008-02-08 at 01:44 +0100, Bartlomiej Zolnierkiewicz wrote:
  - couple of fixes and preparatory patches
  
  - rework of PowerMac media-bay support ([un]register IDE devices instead of
[un]registering IDE interface) [ it is the main reason for spamming PPC 
  ML ]
 
 Interesting... I was thinking about doing a full remove of the device at
 a higher level instead but I suppose what you propose is easier.

Well, I have serious problem on a Pegasos which appeared some time
between 2.6.24 and 2.6.25-rc1: at boot I get an infinite string of 

hdb: empty DMA table?

I'm trying to bisect it right now.

Gabriel


 
 I'll have a look  test next week hopefully.
 
 Ben.
 
 
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Re: [PATCH 00/18] ide: warm-plug support for IDE devices and other goodies

2008-02-12 Thread Gabriel Paubert
On Tue, Feb 12, 2008 at 12:49:05PM +0100, Gabriel Paubert wrote:
 On Fri, Feb 08, 2008 at 07:40:43PM +1100, Benjamin Herrenschmidt wrote:
  
  On Fri, 2008-02-08 at 01:44 +0100, Bartlomiej Zolnierkiewicz wrote:
   - couple of fixes and preparatory patches
   
   - rework of PowerMac media-bay support ([un]register IDE devices instead 
   of
 [un]registering IDE interface) [ it is the main reason for spamming PPC 
   ML ]
  
  Interesting... I was thinking about doing a full remove of the device at
  a higher level instead but I suppose what you propose is easier.
 
 Well, I have serious problem on a Pegasos which appeared some time
 between 2.6.24 and 2.6.25-rc1: at boot I get an infinite string of 
 
 hdb: empty DMA table?
 
 I'm trying to bisect it right now.

Argh, the first bisect point ended up with timeouts on hdb...

Flagged as bad, to try to see when the problems started, but 
I suspect that there are several.

Gabriel
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