Re: [PATCH v3] x86, kdump: Set crashkernel_low automatically

2013-03-18 Thread H. Peter Anvin
On 03/18/2013 04:26 PM, Yinghai Lu wrote: > > now only have: > swiotlb overflow buffer > > v_overflow_buffer = alloc_bootmem_low_pages_nopanic( > PAGE_ALIGN(io_tlb_overflow)); > > and > /* > * When the IOMMU overflows we return a

Re: [PATCH v3] x86, kdump: Set crashkernel_low automatically

2013-03-18 Thread Yinghai Lu
On Mon, Mar 18, 2013 at 3:52 PM, H. Peter Anvin wrote: > On 03/18/2013 02:25 PM, Yinghai Lu wrote: >> Current code does not set low range for crashkernel if the user >> does not specify that. >> >> That cause regressions on system that does not support intel_iommu >> properly. >> >> Chao said that

Re: [PATCH v3] x86, kdump: Set crashkernel_low automatically

2013-03-18 Thread H. Peter Anvin
On 03/18/2013 02:25 PM, Yinghai Lu wrote: > Current code does not set low range for crashkernel if the user > does not specify that. > > That cause regressions on system that does not support intel_iommu > properly. > > Chao said that his system does work well on 3.8 without extra parameter. > ev

[PATCH v3] x86, kdump: Set crashkernel_low automatically

2013-03-18 Thread Yinghai Lu
Current code does not set low range for crashkernel if the user does not specify that. That cause regressions on system that does not support intel_iommu properly. Chao said that his system does work well on 3.8 without extra parameter. even iommu does not work with kdump. Set crashkernel_low au