Loading include/linux/show_mem_notifier.h 0 → 100644 +20 −0 Original line number Diff line number Diff line /* * Copyright (c) 2014, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/notifier.h> int show_mem_notifier_register(struct notifier_block *nb); int show_mem_notifier_unregister(struct notifier_block *nb); void show_mem_call_notifiers(void); mm/Makefile +1 −1 Original line number Diff line number Diff line Loading @@ -37,7 +37,7 @@ obj-y := filemap.o mempool.o oom_kill.o \ mm_init.o mmu_context.o percpu.o slab_common.o \ compaction.o vmacache.o \ interval_tree.o list_lru.o workingset.o \ debug.o $(mmu-y) debug.o $(mmu-y) showmem.o obj-y += init-mm.o Loading mm/showmem.c 0 → 100644 +54 −0 Original line number Diff line number Diff line /* * Copyright (c) 2014, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/kernel.h> #include <linux/notifier.h> #include <linux/debugfs.h> #include <linux/fs.h> #include <linux/init.h> BLOCKING_NOTIFIER_HEAD(show_mem_notifier); int show_mem_notifier_register(struct notifier_block *nb) { return blocking_notifier_chain_register(&show_mem_notifier, nb); } int show_mem_notifier_unregister(struct notifier_block *nb) { return blocking_notifier_chain_unregister(&show_mem_notifier, nb); } void show_mem_call_notifiers(void) { blocking_notifier_call_chain(&show_mem_notifier, 0, NULL); } static int show_mem_notifier_get(void *dat, u64 *val) { show_mem_call_notifiers(); *val = 0; return 0; } DEFINE_SIMPLE_ATTRIBUTE(show_mem_notifier_debug_ops, show_mem_notifier_get, NULL, "%llu\n"); int show_mem_notifier_debugfs_register(void) { debugfs_create_file("show_mem_notifier", 0664, NULL, NULL, &show_mem_notifier_debug_ops); return 0; } late_initcall(show_mem_notifier_debugfs_register); Loading
include/linux/show_mem_notifier.h 0 → 100644 +20 −0 Original line number Diff line number Diff line /* * Copyright (c) 2014, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/notifier.h> int show_mem_notifier_register(struct notifier_block *nb); int show_mem_notifier_unregister(struct notifier_block *nb); void show_mem_call_notifiers(void);
mm/Makefile +1 −1 Original line number Diff line number Diff line Loading @@ -37,7 +37,7 @@ obj-y := filemap.o mempool.o oom_kill.o \ mm_init.o mmu_context.o percpu.o slab_common.o \ compaction.o vmacache.o \ interval_tree.o list_lru.o workingset.o \ debug.o $(mmu-y) debug.o $(mmu-y) showmem.o obj-y += init-mm.o Loading
mm/showmem.c 0 → 100644 +54 −0 Original line number Diff line number Diff line /* * Copyright (c) 2014, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/kernel.h> #include <linux/notifier.h> #include <linux/debugfs.h> #include <linux/fs.h> #include <linux/init.h> BLOCKING_NOTIFIER_HEAD(show_mem_notifier); int show_mem_notifier_register(struct notifier_block *nb) { return blocking_notifier_chain_register(&show_mem_notifier, nb); } int show_mem_notifier_unregister(struct notifier_block *nb) { return blocking_notifier_chain_unregister(&show_mem_notifier, nb); } void show_mem_call_notifiers(void) { blocking_notifier_call_chain(&show_mem_notifier, 0, NULL); } static int show_mem_notifier_get(void *dat, u64 *val) { show_mem_call_notifiers(); *val = 0; return 0; } DEFINE_SIMPLE_ATTRIBUTE(show_mem_notifier_debug_ops, show_mem_notifier_get, NULL, "%llu\n"); int show_mem_notifier_debugfs_register(void) { debugfs_create_file("show_mem_notifier", 0664, NULL, NULL, &show_mem_notifier_debug_ops); return 0; } late_initcall(show_mem_notifier_debugfs_register);
