Messages in this thread | | | Date | Mon, 01 Apr 2013 15:02:03 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] kexec: use Crash kernel for Crash kernel low |
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On 04/01/2013 02:10 PM, Yinghai Lu wrote: > On Mon, Apr 1, 2013 at 1:47 PM, H. Peter Anvin <hpa@zytor.com> wrote: >> On 04/01/2013 12:26 PM, Vivek Goyal wrote: >> >>> crashkernel=<size>,<option>,<option>.. and crashkernel=800M,high sound >>> good to me. >>> >>> So atleast for 3.9 kernel, shall we hide new semantics behind >>> crashkernel=XM,high and by default crashkernel=XM tries to emulate >>> crashkernel=XM,low to retain backward compatibility? >> >> Yes, I suspect so. > > current we have: > 1. crashkernel=XM > 2. crashkernel=XM crashkernel_low=YM > > so you want to change to > 1. crashkernel=XM,low or crashkernel=XM > 2. crashkernel=XM,high > 3. crashkernel=XM,high crashkernel=YM,low > > looks like you change your mind, now you are agreeing on > some could low and some could be high. >
It sounds that the "never DMA'd to memory" notion requires that we have some low memory for the iommu, no?
Or am I misunderstanding what you are asking here?
-hpa
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