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Message-Id: <13.430487409@selenic.com> Date: Fri, 26 Oct 2007 11:36:38 -0500 From: Matt Mackall <mpm@...enic.com> To: Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org Cc: Dave Hansen <haveblue@...ibm.com>, Rusty Russell <rusty@...tcorp.com.au>, Jeremy Fitzhardinge <jeremy@...p.org>, David Rientjes <rientjes@...gle.com>, Fengguang Wu <wfg@...l.ustc.edu.cn> Subject: [PATCH 12/12] maps4: make page monitoring /proc file optional Make /proc/ page monitoring configurable This puts the following files under an embedded config option: /proc/pid/clear_refs /proc/pid/smaps /proc/pid/pagemap /proc/kpagecount /proc/kpageflags Signed-off-by: Matt Mackall <mpm@...enic.com> Index: l/fs/proc/base.c =================================================================== --- l.orig/fs/proc/base.c 2007-10-26 11:33:16.000000000 -0500 +++ l/fs/proc/base.c 2007-10-26 11:34:47.000000000 -0500 @@ -2027,7 +2027,7 @@ static const struct pid_entry tgid_base_ LNK("exe", exe), REG("mounts", S_IRUGO, mounts), REG("mountstats", S_IRUSR, mountstats), -#ifdef CONFIG_MMU +#ifdef CONFIG_PROC_PAGE_MONITOR REG("clear_refs", S_IWUSR, clear_refs), REG("smaps", S_IRUGO, smaps), REG("pagemap", S_IRUSR, pagemap), @@ -2314,7 +2314,7 @@ static const struct pid_entry tid_base_s LNK("root", root), LNK("exe", exe), REG("mounts", S_IRUGO, mounts), -#ifdef CONFIG_MMU +#ifdef CONFIG_PROC_PAGE_MONITOR REG("clear_refs", S_IWUSR, clear_refs), REG("smaps", S_IRUGO, smaps), REG("pagemap", S_IRUSR, pagemap), Index: l/fs/proc/proc_misc.c =================================================================== --- l.orig/fs/proc/proc_misc.c 2007-10-26 11:34:43.000000000 -0500 +++ l/fs/proc/proc_misc.c 2007-10-26 11:34:47.000000000 -0500 @@ -657,6 +657,7 @@ static const struct file_operations proc }; #endif +#ifdef CONFIG_PROC_PAGE_MONITOR #define KPMSIZE sizeof(u64) #define KPMMASK (KPMSIZE - 1) /* /proc/kpagecount - an array exposing page counts @@ -785,6 +786,7 @@ static struct file_operations proc_kpage .llseek = mem_lseek, .read = kpageflags_read, }; +#endif /* CONFIG_PROC_PAGE_MONITOR */ struct proc_dir_entry *proc_root_kcore; @@ -865,8 +867,10 @@ void __init proc_misc_init(void) (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE; } #endif +#ifdef CONFIG_PROC_PAGE_MONITOR create_seq_entry("kpagecount", S_IRUSR, &proc_kpagecount_operations); create_seq_entry("kpageflags", S_IRUSR, &proc_kpageflags_operations); +#endif #ifdef CONFIG_PROC_VMCORE proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL); if (proc_vmcore) Index: l/fs/proc/task_mmu.c =================================================================== --- l.orig/fs/proc/task_mmu.c 2007-10-26 11:34:33.000000000 -0500 +++ l/fs/proc/task_mmu.c 2007-10-26 11:34:47.000000000 -0500 @@ -338,6 +338,7 @@ const struct file_operations proc_maps_o */ #define PSS_SHIFT 12 +#ifdef CONFIG_PROC_PAGE_MONITOR struct mem_size_stats { struct vm_area_struct *vma; @@ -717,6 +718,7 @@ const struct file_operations proc_pagema .llseek = mem_lseek, /* borrow this */ .read = pagemap_read, }; +#endif /* CONFIG_PROC_PAGE_MONITOR */ #ifdef CONFIG_NUMA extern int show_numa_map(struct seq_file *m, void *v); Index: l/init/Kconfig =================================================================== --- l.orig/init/Kconfig 2007-10-26 11:19:35.000000000 -0500 +++ l/init/Kconfig 2007-10-26 11:34:47.000000000 -0500 @@ -571,6 +571,16 @@ config SLOB endchoice +config PROC_PAGE_MONITOR + default y + depends PROC_FS && MMU + bool "Enable /proc page monitoring" if EMBEDDED + help + Various /proc files exist to monitor process memory utilization: + /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap, + /proc/kpagecount, and /proc/kpageflags. Disabling these + interfaces will reduce the size of the kernel by approximately 4kb. + endmenu # General setup config RT_MUTEXES Index: l/mm/Makefile =================================================================== --- l.orig/mm/Makefile 2007-10-26 11:20:01.000000000 -0500 +++ l/mm/Makefile 2007-10-26 11:34:47.000000000 -0500 @@ -5,7 +5,7 @@ mmu-y := nommu.o mmu-$(CONFIG_MMU) := fremap.o highmem.o madvise.o memory.o mincore.o \ mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \ - vmalloc.o pagewalk.o + vmalloc.o obj-y := bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \ page_alloc.o page-writeback.o pdflush.o \ @@ -13,6 +13,7 @@ obj-y := bootmem.o filemap.o mempool.o prio_tree.o util.o mmzone.o vmstat.o backing-dev.o \ $(mmu-y) +obj-$(CONFIG_PROC_PAGE_MONITOR) += pagewalk.o obj-$(CONFIG_BOUNCE) += bounce.o obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o thrash.o obj-$(CONFIG_HUGETLBFS) += hugetlb.o - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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