On 10/21/17 at 12:20am, Yinghai Lu wrote: > On Thu, Oct 19, 2017 at 10:52 PM, Dave Young <dyoung at redhat.com> wrote: > > Now crashkernel=X will fail if there's not enough memory at low region > > (below 896M) when trying to reserve large memory size. One can use > > crashkernel=xM,high to reserve it at high region (>4G) but it is more > > convinient to improve crashkernel=X to: > > > > - First try to reserve X below 896M (for being compatible with old > > kexec-tools). > > - If fails, try to reserve X below 4G (swiotlb need to stay below 4G). > > - If fails, try to reserve X from MAXMEM top down. > > > > It's more transparent and user-friendly. > > ok with me. Thank you! > > But looks like last time Vivek did not like this idea. >From the old discussion I remember Vivek was fine with this patch: https://lkml.org/lkml/2013/10/15/601 Thanks Dave
