Re: Arm64 crash while reading memory sysfs
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2021-05-26 13:04:38
Also in:
linux-arm-kernel, lkml
On Wed, May 26, 2021 at 12:09:14PM +0000, Qian Cai (QUIC) wrote:
[ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000090000000-0x0000000091ffffff]
Maybe de-selecting HOLES_IN_ZONE is not correct for arm64 in all circumstances. In a configuration with 64K pages, MAX_ORDER is 14, MAX_ORDER_NR_PAGES is 8192, so a 2^29 address range. However, the above range starts on 2^28 boundary. SECTION_SIZE_BITS is 29 in this configuration but the corresponding mem_map[] in the first half of the first section is probably not marked as reserved as we'd do for NOMAP. -- Catalin