On Thu, Apr 4, 2013 at 7:11 AM, Vivek Goyal <vgo...@redhat.com> wrote:
> On Wed, Apr 03, 2013 at 05:38:23PM -0700, Yinghai Lu wrote:
>
> [..]
>> + if (ret != 0) {
>> + /*
>> + * two parts from lib/swiotlb.c:
>> + * swiotlb size: user specified with swiotlb= or default.
>> + * swiotlb overflow buffer: now is hardcoded to 32k,
>> + * round to 8M to cover more others.
>> + */
>> + low_size = swiotlb_size_or_default() + (8UL<<20);
>> + auto_set = true;
>
> What is the correlation between swiotlb size of first kernel and second
> kernel. They might be completely different kernel and with different
> default size for swiotlb buffers.
>
You are right.
That is most good guess assume they are the same.
> [..]
>>
>> + crashkernel_low=size[KMG]
>> + [KNL, x86_64] range under 4G. When crashkernel= is
>> + passed, kernel allocate physical memory region
>> + above 4G,
>
> This is not right. "When crashkernel=X;high is passed kernel first tries
> to allocate memory above 4G". crashkernel=X does not try to allocate
> memory above 4G.
This is first patch, the text will be updated in second and fourth patch.
Thanks
Yinghai
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