Cong Wang <amwang at redhat.com> writes: > Eric W. Biederman wrote: >> Vivek Goyal <vgoyal at redhat.com> writes: >> >>> Vitaly, have you really run into cases where 2G upper limit is a concern. >>> What is the configuration you have, how much memory it has and how much >>> memory are you planning to reserve for kdump kernel? >> >> A good question. >> > > We have observed that on a machine which has 66G memory, when we do > crashkernel=1G at 4G, kexec failed to load the crash kernel, but the memory > reservation _did_ succeed. Did you try loading vmlinux? If not this sounds like the fact that /sbin/kexec doesn't realize it can boot a 64bit bzImage in 64bit mode. Eric
