Re: [Fastboot] [PATCH] Kdump documentation update for 2.6.20: ia64 portion

2007-01-12 Thread Horms
On Fri, Jan 12, 2007 at 11:46:39AM -0800, Jay Lan wrote:
> Horms wrote:
> > Hi,
> > 
> > this patch fills in the portions for ia64 kexec.
> > 
> > I'm actually not sure what options are required for the dump-capture
> > kernel, but "init 1 irqpoll maxcpus=1" has been working fine for me.
> > Or more to the point, I'm not sure if irqpoll is needed or not.
> > 
> > This patch requires the documentation patch update that Vivek Goyal has
> > been circulating, and I believe is currently in mm. Feel free to fold it
> > into that change if it makes things easier for anyone.
> > 
> > Take II
> > 
> > Nanhai,
> > 
> > I have noted that vmlinux.gz may also be used. And added a note about the
> > kernel being able to automatically place the crashkernel region.
> > Furthermore, I added a note that if manually specified, the region should
> > be 64Mb aligned to avoid wastage. I notice that the auto placement code
> > uses 64Mb. But is this strictly neccessary for all page sizes?
> > 
> > Signed-off-by: Simon Horman <[EMAIL PROTECTED]>
> > 
> > Index: linux-2.6/Documentation/kdump/kdump.txt
> > ===
> > --- linux-2.6.orig/Documentation/kdump/kdump.txt2007-01-12 
> > 17:45:19.0 +0900
> > +++ linux-2.6/Documentation/kdump/kdump.txt 2007-01-12 17:59:42.0 
> > +0900
> > @@ -17,7 +17,7 @@
> >  memory image to a dump file on the local disk, or across the network to
> >  a remote system.
> >  
> > -Kdump and kexec are currently supported on the x86, x86_64, ppc64 and IA64
> > +Kdump and kexec are currently supported on the x86, x86_64, ppc64 and ia64
> >  architectures.
> >  
> >  When the system kernel boots, it reserves a small section of memory for
> > @@ -229,7 +229,23 @@
> >  
> >  Dump-capture kernel config options (Arch Dependent, ia64)
> >  --
> > -(To be filled)
> > +
> > +- No specific options are required to create a dump-capture kernel
> > +  for ia64, other than those specified in the arch idependent section
> > +  above. This means that it is possible to use the system kernel
> > +  as a dump-capture kernel if desired.
> > +  
> > +  The crashkernel region can be automatically placed by the system
> > +  kernel at run time. This is done by specifying the base address as 0,
> > +  or omitting it all together.
> 
> In my testing, i found the base address was ignored. Whatever value
> specified was fine. Not necessary to be 0. But i guess it is fine to
> give people a guideline telling them to specify 0.

I submitted a patch to honour non-zero base addresses,
I'm pretty sure it is in there now.

-- 
Horms
  H: http://www.vergenet.net/~horms/
  W: http://www.valinux.co.jp/en/

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Re: [Fastboot] [PATCH] Kdump documentation update for 2.6.20: ia64 portion

2007-01-12 Thread Jay Lan
Horms wrote:
> Hi,
> 
> this patch fills in the portions for ia64 kexec.
> 
> I'm actually not sure what options are required for the dump-capture
> kernel, but "init 1 irqpoll maxcpus=1" has been working fine for me.
> Or more to the point, I'm not sure if irqpoll is needed or not.
> 
> This patch requires the documentation patch update that Vivek Goyal has
> been circulating, and I believe is currently in mm. Feel free to fold it
> into that change if it makes things easier for anyone.
> 
> Take II
> 
> Nanhai,
> 
> I have noted that vmlinux.gz may also be used. And added a note about the
> kernel being able to automatically place the crashkernel region.
> Furthermore, I added a note that if manually specified, the region should
> be 64Mb aligned to avoid wastage. I notice that the auto placement code
> uses 64Mb. But is this strictly neccessary for all page sizes?
> 
> Signed-off-by: Simon Horman <[EMAIL PROTECTED]>
> 
> Index: linux-2.6/Documentation/kdump/kdump.txt
> ===
> --- linux-2.6.orig/Documentation/kdump/kdump.txt  2007-01-12 
> 17:45:19.0 +0900
> +++ linux-2.6/Documentation/kdump/kdump.txt   2007-01-12 17:59:42.0 
> +0900
> @@ -17,7 +17,7 @@
>  memory image to a dump file on the local disk, or across the network to
>  a remote system.
>  
> -Kdump and kexec are currently supported on the x86, x86_64, ppc64 and IA64
> +Kdump and kexec are currently supported on the x86, x86_64, ppc64 and ia64
>  architectures.
>  
>  When the system kernel boots, it reserves a small section of memory for
> @@ -229,7 +229,23 @@
>  
>  Dump-capture kernel config options (Arch Dependent, ia64)
>  --
> -(To be filled)
> +
> +- No specific options are required to create a dump-capture kernel
> +  for ia64, other than those specified in the arch idependent section
> +  above. This means that it is possible to use the system kernel
> +  as a dump-capture kernel if desired.
> +  
> +  The crashkernel region can be automatically placed by the system
> +  kernel at run time. This is done by specifying the base address as 0,
> +  or omitting it all together.

In my testing, i found the base address was ignored. Whatever value
specified was fine. Not necessary to be 0. But i guess it is fine to
give people a guideline telling them to specify 0.

Cheers,
 - jay


> +
> +  [EMAIL PROTECTED]
> +  or
> +  crashkernel=256M
> +
> +  If the start address is specified, not that the start address of the
> +  kernel will be alligned to 64Mb, so any if the start address is not then
> +  any space below the alignment point will be wasted.
>  
>  
>  Boot into System Kernel
> @@ -248,6 +264,10 @@
>  
> On ppc64, use "[EMAIL PROTECTED]".
>  
> +   On ia64, [EMAIL PROTECTED] is a generous value that typically works.
> +   The region may be automatically placed on ia64, see the
> +   dump-capture kernel config option notes above.
> +
>  Load the Dump-capture Kernel
>  
>  
> @@ -266,7 +286,8 @@
>  For ppc64:
>   - Use vmlinux
>  For ia64:
> - (To be filled)
> + - Use vmlinux or vmlinuz.gz
> +
>  
>  If you are using a uncompressed vmlinux image then use following command
>  to load dump-capture kernel.
> @@ -282,18 +303,19 @@
> --initrd= \
> --append="root= "
>  
> +Please note, that --args-linux does not need to be specified for ia64.
> +It is planned to make this a no-op on that architecture, but for now
> +it should be omitted
> +
>  Following are the arch specific command line options to be used while
>  loading dump-capture kernel.
>  
> -For i386 and x86_64:
> +For i386, x86_64 and ia64:
>   "init 1 irqpoll maxcpus=1"
>  
>  For ppc64:
>   "init 1 maxcpus=1 noirqdistrib"
>  
> -For IA64
> - (To be filled)
> -
>  
>  Notes on loading the dump-capture kernel:
>  
> ___
> fastboot mailing list
> fastboot@lists.osdl.org
> https://lists.osdl.org/mailman/listinfo/fastboot

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Re: [Fastboot] [PATCH] Kdump documentation update for 2.6.20: ia64 portion

2007-01-12 Thread Jay Lan
Horms wrote:
 Hi,
 
 this patch fills in the portions for ia64 kexec.
 
 I'm actually not sure what options are required for the dump-capture
 kernel, but init 1 irqpoll maxcpus=1 has been working fine for me.
 Or more to the point, I'm not sure if irqpoll is needed or not.
 
 This patch requires the documentation patch update that Vivek Goyal has
 been circulating, and I believe is currently in mm. Feel free to fold it
 into that change if it makes things easier for anyone.
 
 Take II
 
 Nanhai,
 
 I have noted that vmlinux.gz may also be used. And added a note about the
 kernel being able to automatically place the crashkernel region.
 Furthermore, I added a note that if manually specified, the region should
 be 64Mb aligned to avoid wastage. I notice that the auto placement code
 uses 64Mb. But is this strictly neccessary for all page sizes?
 
 Signed-off-by: Simon Horman [EMAIL PROTECTED]
 
 Index: linux-2.6/Documentation/kdump/kdump.txt
 ===
 --- linux-2.6.orig/Documentation/kdump/kdump.txt  2007-01-12 
 17:45:19.0 +0900
 +++ linux-2.6/Documentation/kdump/kdump.txt   2007-01-12 17:59:42.0 
 +0900
 @@ -17,7 +17,7 @@
  memory image to a dump file on the local disk, or across the network to
  a remote system.
  
 -Kdump and kexec are currently supported on the x86, x86_64, ppc64 and IA64
 +Kdump and kexec are currently supported on the x86, x86_64, ppc64 and ia64
  architectures.
  
  When the system kernel boots, it reserves a small section of memory for
 @@ -229,7 +229,23 @@
  
  Dump-capture kernel config options (Arch Dependent, ia64)
  --
 -(To be filled)
 +
 +- No specific options are required to create a dump-capture kernel
 +  for ia64, other than those specified in the arch idependent section
 +  above. This means that it is possible to use the system kernel
 +  as a dump-capture kernel if desired.
 +  
 +  The crashkernel region can be automatically placed by the system
 +  kernel at run time. This is done by specifying the base address as 0,
 +  or omitting it all together.

In my testing, i found the base address was ignored. Whatever value
specified was fine. Not necessary to be 0. But i guess it is fine to
give people a guideline telling them to specify 0.

Cheers,
 - jay


 +
 +  [EMAIL PROTECTED]
 +  or
 +  crashkernel=256M
 +
 +  If the start address is specified, not that the start address of the
 +  kernel will be alligned to 64Mb, so any if the start address is not then
 +  any space below the alignment point will be wasted.
  
  
  Boot into System Kernel
 @@ -248,6 +264,10 @@
  
 On ppc64, use [EMAIL PROTECTED].
  
 +   On ia64, [EMAIL PROTECTED] is a generous value that typically works.
 +   The region may be automatically placed on ia64, see the
 +   dump-capture kernel config option notes above.
 +
  Load the Dump-capture Kernel
  
  
 @@ -266,7 +286,8 @@
  For ppc64:
   - Use vmlinux
  For ia64:
 - (To be filled)
 + - Use vmlinux or vmlinuz.gz
 +
  
  If you are using a uncompressed vmlinux image then use following command
  to load dump-capture kernel.
 @@ -282,18 +303,19 @@
 --initrd=initrd-for-dump-capture-kernel \
 --append=root=root-dev arch-specific-options
  
 +Please note, that --args-linux does not need to be specified for ia64.
 +It is planned to make this a no-op on that architecture, but for now
 +it should be omitted
 +
  Following are the arch specific command line options to be used while
  loading dump-capture kernel.
  
 -For i386 and x86_64:
 +For i386, x86_64 and ia64:
   init 1 irqpoll maxcpus=1
  
  For ppc64:
   init 1 maxcpus=1 noirqdistrib
  
 -For IA64
 - (To be filled)
 -
  
  Notes on loading the dump-capture kernel:
  
 ___
 fastboot mailing list
 fastboot@lists.osdl.org
 https://lists.osdl.org/mailman/listinfo/fastboot

-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
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Please read the FAQ at  http://www.tux.org/lkml/


Re: [Fastboot] [PATCH] Kdump documentation update for 2.6.20: ia64 portion

2007-01-12 Thread Horms
On Fri, Jan 12, 2007 at 11:46:39AM -0800, Jay Lan wrote:
 Horms wrote:
  Hi,
  
  this patch fills in the portions for ia64 kexec.
  
  I'm actually not sure what options are required for the dump-capture
  kernel, but init 1 irqpoll maxcpus=1 has been working fine for me.
  Or more to the point, I'm not sure if irqpoll is needed or not.
  
  This patch requires the documentation patch update that Vivek Goyal has
  been circulating, and I believe is currently in mm. Feel free to fold it
  into that change if it makes things easier for anyone.
  
  Take II
  
  Nanhai,
  
  I have noted that vmlinux.gz may also be used. And added a note about the
  kernel being able to automatically place the crashkernel region.
  Furthermore, I added a note that if manually specified, the region should
  be 64Mb aligned to avoid wastage. I notice that the auto placement code
  uses 64Mb. But is this strictly neccessary for all page sizes?
  
  Signed-off-by: Simon Horman [EMAIL PROTECTED]
  
  Index: linux-2.6/Documentation/kdump/kdump.txt
  ===
  --- linux-2.6.orig/Documentation/kdump/kdump.txt2007-01-12 
  17:45:19.0 +0900
  +++ linux-2.6/Documentation/kdump/kdump.txt 2007-01-12 17:59:42.0 
  +0900
  @@ -17,7 +17,7 @@
   memory image to a dump file on the local disk, or across the network to
   a remote system.
   
  -Kdump and kexec are currently supported on the x86, x86_64, ppc64 and IA64
  +Kdump and kexec are currently supported on the x86, x86_64, ppc64 and ia64
   architectures.
   
   When the system kernel boots, it reserves a small section of memory for
  @@ -229,7 +229,23 @@
   
   Dump-capture kernel config options (Arch Dependent, ia64)
   --
  -(To be filled)
  +
  +- No specific options are required to create a dump-capture kernel
  +  for ia64, other than those specified in the arch idependent section
  +  above. This means that it is possible to use the system kernel
  +  as a dump-capture kernel if desired.
  +  
  +  The crashkernel region can be automatically placed by the system
  +  kernel at run time. This is done by specifying the base address as 0,
  +  or omitting it all together.
 
 In my testing, i found the base address was ignored. Whatever value
 specified was fine. Not necessary to be 0. But i guess it is fine to
 give people a guideline telling them to specify 0.

I submitted a patch to honour non-zero base addresses,
I'm pretty sure it is in there now.

-- 
Horms
  H: http://www.vergenet.net/~horms/
  W: http://www.valinux.co.jp/en/

-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/