Li Zhe c4f20f1479 page_ext: introduce boot parameter 'early_page_ext' ... In commit 2f1ee0913c ("Revert "mm: use early_pfn_to_nid in page_ext_init""), we call page_ext_init() after page_alloc_init_late() to avoid some panic problem. It seems that we cannot track early page allocations in current kernel even if page structure has been initialized early. This patch introduces a new boot parameter 'early_page_ext' to resolve this problem. If we pass it to the kernel, page_ext_init() will be moved up and the feature 'deferred initialization of struct pages' will be disabled to initialize the page allocator early and prevent the panic problem above. It can help us to catch early page allocations. This is useful especially when we find that the free memory value is not the same right after different kernel booting. [akpm@linux-foundation.org: fix section issue by removing __meminitdata] Link: https://lkml.kernel.org/r/20220825102714.669-1-lizhe.67@bytedance.com Signed-off-by: Li Zhe <lizhe.67@bytedance.com> Suggested-by: Michal Hocko <mhocko@suse.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kees Cook <keescook@chromium.org> Cc: Mark-PK Tsai <mark-pk.tsai@mediatek.com> Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2022-09-11 20:26:02 -07:00
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calibrate.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
do_mounts_initrd.c	kernel/do_mount_initrd: move real_root_dev sysctls to its own file	2022-04-06 13:43:44 -07:00
do_mounts_rd.c	init: add an init_unlink helper	2020-07-31 08:17:52 +02:00
do_mounts.c	block: remove genhd.h	2022-02-02 07:49:59 -07:00
do_mounts.h	init: add an init_mknod helper	2020-07-31 08:17:54 +02:00
init_task.c	rcu-tasks: Add data structures for lightweight grace periods	2022-06-20 09:22:28 -07:00
initramfs.c	This set of changes updates init and user mode helper tasks to be	2022-06-03 16:03:05 -07:00
Kconfig	asm goto: eradicate CC_HAS_ASM_GOTO	2022-08-21 10:06:28 -07:00
main.c	page_ext: introduce boot parameter 'early_page_ext'	2022-09-11 20:26:02 -07:00
Makefile	sched/preempt: Tell about PREEMPT_DYNAMIC on kernel headers	2022-03-11 15:36:35 +01:00
noinitramfs.c	init: move usermodehelper_enable() to populate_rootfs()	2021-09-08 11:50:27 -07:00
version.c	init: add "hostname" kernel parameter	2022-07-17 17:31:37 -07:00