Re: [PATCH 5.10 051/120] memblock: do not start bottom-up allocations with kernel_end

Greg Kroah-Hartman gregkh@linuxfoundation.org writes:

From: Roman Gushchin guro@fb.com

[ Upstream commit 2dcb3964544177c51853a210b6ad400de78ef17d ]

With kaslr the kernel image is placed at a random place, so starting the bottom-up allocation with the kernel_end can result in an allocation failure and a warning like this one:

Not sure if this is ready for stable yet (including stable branches 4.19 and 5.4), since it seems to uncover latent bugs in x86 early memory reservation. I asked about this issue here:

https://lore.kernel.org/lkml/87ft26yuwg.fsf@manicouagan.localdomain/