Re: [PATCH RFC v1] drivers/base/node: consolidate node device subsystem initialization in node_dev_init()
From: Anatoly Pugachev <hidden>
Date: 2022-02-01 10:03:02
Also in:
linux-arm-kernel, linux-mips, linux-mm, linux-riscv, linux-s390, linux-sh, lkml, sparclinux
On Mon, Jan 31, 2022 at 2:11 PM David Hildenbrand [off-list ref] wrote:
... and call node_dev_init() after memory_dev_init() from driver_init(), so before any of the existing arch/subsys calls. All online nodes should be known at that point. This is in line with memory_dev_init(), which initializes the memory device subsystem and creates all memory block devices. Similar to memory_dev_init(), panic() if anything goes wrong, we don't want to continue with such basic initialization errors. The important part is that node_dev_init() gets called after memory_dev_init() and after cpu_dev_init(), but before any of the relevant archs call register_cpu() to register the new cpu device under the node device. The latter should be the case for the current users of topology_init(). RFC because I tested only on x86-64 and s390x, I think I cross-compiled all applicable architectures except riscv and sparc.
Compiled and boot tested on sparc. Tested-by: Anatoly Pugachev <redacted> (sparc64)