Am Dienstag, 28 Juni 2016, 00:19:48 schrieb Dave Young: > On 06/23/16 at 12:37pm, Thiago Jung Bauermann wrote: > > Am Donnerstag, 23 Juni 2016, 01:44:07 schrieb Dave Young: > > What is bad about the description of top_down? > It is not clear enough to me, I personally think the original one in > source code is better: > /* allocate from top of memory hole */ Actually I realized there's some discrepancy in how the x86 code uses top_down and how I need it to work in powerpc. This may be what is confusing about my comment and the existing comment. x86 always walks memory from bottom to top but if top_down is true, in each memory region it will allocate the memory hole in the highest address within that region. I don't know why it is done that way, though. On powerpc, the memory walk itself should be from top to bottom, as well as the memory hole allocation within each memory region. Should I add a separate top_down argument to kexec_locate_mem_hole to control if the memory walk should be from top to bottom, and then the bottom_up member of struct kexec_buf controls where inside each memory region the memory hole will be allocated? -- []'s Thiago Jung Bauermann IBM Linux Technology Center
