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Message-ID: <20090722060047.GC6281@cr0.nay.redhat.com>
Date: Wed, 22 Jul 2009 14:00:47 +0800
From: Amerigo Wang <xiyou.wangcong@...il.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/4] kcore: add kclist type
On Wed, Jul 22, 2009 at 02:08:13PM +0900, KAMEZAWA Hiroyuki wrote:
>From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
>
>Now, kclist_add() only eats start address and size as its arguments.
>Considering to make kclist dynamically reconfigulable, it's necessary
>to know which kclists are for System RAM and whic is not.
>
>This patch add kclist types as
> KCORE_RAM
> KCORE_VMALLOC
> KCORE_TEXT
> KCORE_OTHER
>
>region for KCORE_RAM will be dynamically updated at memory hotplug.
The idea is good, but will it be used in any of your latter patches?
I don't see it, can you point it out?
Thanks.
Reviewed-by: WANG Cong <xiyou.wangcong@...il.com>
>
>Chnagelog v1->v2
> - no changes.
>
>Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
>---
> arch/ia64/mm/init.c | 7 ++++---
> arch/mips/mm/init.c | 7 ++++---
> arch/powerpc/mm/init_32.c | 4 ++--
> arch/powerpc/mm/init_64.c | 5 +++--
> arch/sh/mm/init.c | 4 ++--
> arch/x86/mm/init_32.c | 4 ++--
> arch/x86/mm/init_64.c | 11 ++++++-----
> fs/proc/kcore.c | 3 ++-
> include/linux/proc_fs.h | 13 +++++++++++--
> 9 files changed, 36 insertions(+), 22 deletions(-)
>
>Index: mmotm-2.6.31-Jul16/include/linux/proc_fs.h
>===================================================================
>--- mmotm-2.6.31-Jul16.orig/include/linux/proc_fs.h
>+++ mmotm-2.6.31-Jul16/include/linux/proc_fs.h
>@@ -78,10 +78,18 @@ struct proc_dir_entry {
> struct list_head pde_openers; /* who did ->open, but not ->release */
> };
>
>+enum kcore_type {
>+ KCORE_TEXT,
>+ KCORE_VMALLOC,
>+ KCORE_RAM,
>+ KCORE_OTHER,
>+};
>+
> struct kcore_list {
> struct list_head list;
> unsigned long addr;
> size_t size;
>+ int type;
> };
>
> struct vmcore {
>@@ -233,11 +241,12 @@ static inline void dup_mm_exe_file(struc
> #endif /* CONFIG_PROC_FS */
>
> #if !defined(CONFIG_PROC_KCORE)
>-static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
>+static inline void
>+kclist_add(struct kcore_list *new, void *addr, size_t size, int type)
> {
> }
> #else
>-extern void kclist_add(struct kcore_list *, void *, size_t);
>+extern void kclist_add(struct kcore_list *, void *, size_t, int type);
> #endif
>
> union proc_op {
>Index: mmotm-2.6.31-Jul16/arch/ia64/mm/init.c
>===================================================================
>--- mmotm-2.6.31-Jul16.orig/arch/ia64/mm/init.c
>+++ mmotm-2.6.31-Jul16/arch/ia64/mm/init.c
>@@ -639,9 +639,10 @@ mem_init (void)
>
> high_memory = __va(max_low_pfn * PAGE_SIZE);
>
>- kclist_add(&kcore_mem, __va(0), max_low_pfn * PAGE_SIZE);
>- kclist_add(&kcore_vmem, (void *)VMALLOC_START, VMALLOC_END-VMALLOC_START);
>- kclist_add(&kcore_kernel, _stext, _end - _stext);
>+ kclist_add(&kcore_mem, __va(0), max_low_pfn * PAGE_SIZE, KCORE_RAM);
>+ kclist_add(&kcore_vmem, (void *)VMALLOC_START,
>+ VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
>+ kclist_add(&kcore_kernel, _stext, _end - _stext, KCORE_TEXT);
>
> for_each_online_pgdat(pgdat)
> if (pgdat->bdata->node_bootmem_map)
>Index: mmotm-2.6.31-Jul16/arch/mips/mm/init.c
>===================================================================
>--- mmotm-2.6.31-Jul16.orig/arch/mips/mm/init.c
>+++ mmotm-2.6.31-Jul16/arch/mips/mm/init.c
>@@ -409,11 +409,12 @@ void __init mem_init(void)
> if ((unsigned long) &_text > (unsigned long) CKSEG0)
> /* The -4 is a hack so that user tools don't have to handle
> the overflow. */
>- kclist_add(&kcore_kseg0, (void *) CKSEG0, 0x80000000 - 4);
>+ kclist_add(&kcore_kseg0, (void *) CKSEG0,
>+ 0x80000000 - 4, KCORE_TEXT);
> #endif
>- kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
>+ kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
> kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
>- VMALLOC_END-VMALLOC_START);
>+ VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
>
> printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
> "%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n",
>Index: mmotm-2.6.31-Jul16/arch/powerpc/mm/init_32.c
>===================================================================
>--- mmotm-2.6.31-Jul16.orig/arch/powerpc/mm/init_32.c
>+++ mmotm-2.6.31-Jul16/arch/powerpc/mm/init_32.c
>@@ -270,11 +270,11 @@ static int __init setup_kcore(void)
> size);
> }
>
>- kclist_add(kcore_mem, __va(base), size);
>+ kclist_add(kcore_mem, __va(base), size, KCORE_RAM);
> }
>
> kclist_add(&kcore_vmem, (void *)VMALLOC_START,
>- VMALLOC_END-VMALLOC_START);
>+ VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
>
> return 0;
> }
>Index: mmotm-2.6.31-Jul16/arch/powerpc/mm/init_64.c
>===================================================================
>--- mmotm-2.6.31-Jul16.orig/arch/powerpc/mm/init_64.c
>+++ mmotm-2.6.31-Jul16/arch/powerpc/mm/init_64.c
>@@ -128,10 +128,11 @@ static int __init setup_kcore(void)
> if (!kcore_mem)
> panic("%s: kmalloc failed\n", __func__);
>
>- kclist_add(kcore_mem, __va(base), size);
>+ kclist_add(kcore_mem, __va(base), size, KCORE_RAM);
> }
>
>- kclist_add(&kcore_vmem, (void *)VMALLOC_START, VMALLOC_END-VMALLOC_START);
>+ kclist_add(&kcore_vmem, (void *)VMALLOC_START,
>+ VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
>
> return 0;
> }
>Index: mmotm-2.6.31-Jul16/arch/sh/mm/init.c
>===================================================================
>--- mmotm-2.6.31-Jul16.orig/arch/sh/mm/init.c
>+++ mmotm-2.6.31-Jul16/arch/sh/mm/init.c
>@@ -218,9 +218,9 @@ void __init mem_init(void)
> datasize = (unsigned long) &_edata - (unsigned long) &_etext;
> initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
>
>- kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
>+ kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
> kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
>- VMALLOC_END - VMALLOC_START);
>+ VMALLOC_END - VMALLOC_START, KCORE_VMALLOC);
>
> printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
> "%dk data, %dk init)\n",
>Index: mmotm-2.6.31-Jul16/arch/x86/mm/init_32.c
>===================================================================
>--- mmotm-2.6.31-Jul16.orig/arch/x86/mm/init_32.c
>+++ mmotm-2.6.31-Jul16/arch/x86/mm/init_32.c
>@@ -886,9 +886,9 @@ void __init mem_init(void)
> datasize = (unsigned long) &_edata - (unsigned long) &_etext;
> initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
>
>- kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
>+ kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
> kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
>- VMALLOC_END-VMALLOC_START);
>+ VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
>
> printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
> "%dk reserved, %dk data, %dk init, %ldk highmem)\n",
>Index: mmotm-2.6.31-Jul16/arch/x86/mm/init_64.c
>===================================================================
>--- mmotm-2.6.31-Jul16.orig/arch/x86/mm/init_64.c
>+++ mmotm-2.6.31-Jul16/arch/x86/mm/init_64.c
>@@ -677,13 +677,14 @@ void __init mem_init(void)
> initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
>
> /* Register memory areas for /proc/kcore */
>- kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
>+ kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
> kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
>- VMALLOC_END-VMALLOC_START);
>- kclist_add(&kcore_kernel, &_stext, _end - _stext);
>- kclist_add(&kcore_modules, (void *)MODULES_VADDR, MODULES_LEN);
>+ VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
>+ kclist_add(&kcore_kernel, &_stext, _end - _stext, KCORE_TEXT);
>+ kclist_add(&kcore_modules, (void *)MODULES_VADDR, MODULES_LEN,
>+ KCORE_OTHER);
> kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START,
>- VSYSCALL_END - VSYSCALL_START);
>+ VSYSCALL_END - VSYSCALL_START, KCORE_OTHER);
>
> printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
> "%ldk absent, %ldk reserved, %ldk data, %ldk init)\n",
>Index: mmotm-2.6.31-Jul16/fs/proc/kcore.c
>===================================================================
>--- mmotm-2.6.31-Jul16.orig/fs/proc/kcore.c
>+++ mmotm-2.6.31-Jul16/fs/proc/kcore.c
>@@ -62,10 +62,11 @@ static LIST_HEAD(kclist_head);
> static DEFINE_RWLOCK(kclist_lock);
>
> void
>-kclist_add(struct kcore_list *new, void *addr, size_t size)
>+kclist_add(struct kcore_list *new, void *addr, size_t size, int type)
> {
> new->addr = (unsigned long)addr;
> new->size = size;
>+ new->type = type;
>
> write_lock(&kclist_lock);
> list_add_tail(&new->list, &kclist_head);
>
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