Re: [Cbe-oss-dev] [PATCH] powerpc/cell: disable ptcal in case of kdump reboot

2008-06-12 Thread Arnd Bergmann
On Wednesday 11 June 2008, Michael Ellerman wrote: On Wed, 2008-06-11 at 18:28 +0200, Arnd Bergmann wrote: We used to do this correctly in case of a user triggered kexec, but not for kdump. Used to? Sorry, wrong wording. I meant without this patch, it's correct for kexec. This patch

Re: [Cbe-oss-dev] [PATCH] powerpc/cell: disable ptcal in case of kdump reboot

2008-06-12 Thread Michael Neuling
In message [EMAIL PROTECTED] you wrote: On Wednesday 11 June 2008, Michael Ellerman wrote: On Wed, 2008-06-11 at 18:28 +0200, Arnd Bergmann wrote: We used to do this correctly in case of a user triggered kexec, but not for kdump. Used to? Sorry, wrong wording. I meant without this

Re: [Cbe-oss-dev] [PATCH] powerpc/cell: disable ptcal in case of kdump reboot

2008-06-12 Thread Michael Ellerman
On Thu, 2008-06-12 at 18:06 +1000, Michael Neuling wrote: In message [EMAIL PROTECTED] you wrote: On Wednesday 11 June 2008, Michael Ellerman wrote: On Wed, 2008-06-11 at 18:28 +0200, Arnd Bergmann wrote: We used to do this correctly in case of a user triggered kexec, but not for

Re: [Cbe-oss-dev] [PATCH] powerpc/cell: disable ptcal in case of kdump reboot

2008-06-11 Thread Michael Ellerman
On Wed, 2008-06-11 at 18:28 +0200, Arnd Bergmann wrote: The ibm,cbe-start-ptcal rtas call transfers ownership of a memory range to the hardware in order to do periodic memory interface recalibration. When we do a kexec, we need to get this page back, so we don't step on the new kernel's toes.