Manish Ahuja writes: > Initial patch for reserving memory in early boot, and freeing it later. > If the previous boot had ended with a crash, the reserved memory would contain > a copy of the crashed kernel data.
The main problem I see here is that if this option is turned on, the kernel now has only 256MB of memory from early boot until subsys_initcalls are done -- on any machine, and whether or not there is actually a dump. That means, for instance, that a machine running bare-metal (such as a G5) might not be able to allocate the hash table for the MMU. Also, any allocations made during that time won't be able to be node-local. So it will be necessary to read the flattened device tree early on to see whether or not there is a dump, so that we don't reserve most of memory in the cases where there isn't a dump. Paul. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
