On Thu, Mar 7, 2013 at 10:03 PM, CAI Qian <caiqian at redhat.com> wrote: > CC'ing kexec ML. Also mentioned that 3.8 has no such issue. > > This message looks suspicious and out of range while 3.8 reservation > looks within the range. > > [ 0.000000] Reserving 128MB of memory at 5216MB for crashkernel > (System RAM: 3977MB) > > Wondering if anything to do with memblock again... that is intended... > ----- Original Message ----- >> From: "WANG Chao" <chaowang at redhat.com> >> To: "LKML" vger.kernel.org> >> Cc: "CAI Qian" <caiqian at redhat.com> >> Sent: Friday, March 8, 2013 1:54:37 PM >> Subject: 3.9-rc1: crash kernel panic - not syncing: Can not allocate SWIOTLB buffer earlier and can't now provide you >> with the DMA bounce buffer >> >> Hi, All >> >> On 3.9-rc1, I load crash kernel with latest kexec-tools(up to >> 28d413a), but >> 2nd kernel panic at early time: >> [ 2.948076] Kernel panic - not syncing: Can not allocate SWIOTLB >> buffer earlier and can't now provide you with the DMA bounce buffer >> [ 2.959958] Pid: 53, comm: khubd Not tainted 3.9.0-rc1+ #1 You need to add crashkernel_low=64M in first kernel. As your system does not support DMA remapping. Thanks Yinghai
