The patch titled
kcore: register text area in generic way
has been added to the -mm tree. Its filename is
kcore-register-text-area-in-generic-way.patch
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------------------------------------------------------
Subject: kcore: register text area in generic way
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Some 64bit arch has special segment for mapping kernel text. It should be
entried to /proc/kcore in addtion to direct-linear-map, vmalloc area.
This patch unifies KCORE_TEXT entry scattered under x86 and ia64.
I'm not familiar with other archs (mips has its own even after this patch)
but range of [_stext ..._end) is a valid area of text and it's not in
direct-map area, defining CONFIG_ARCH_PROC_KCORE_TEXT is only a necessary
thing to do.
Note: I left mips as it is now.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: WANG Cong <xiyou.wangcong@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/ia64/Kconfig | 4 ++++
arch/ia64/mm/init.c | 3 +--
arch/x86/Kconfig | 4 ++++
arch/x86/mm/init_64.c | 4 +---
fs/proc/kcore.c | 19 ++++++++++++++++++-
5 files changed, 28 insertions(+), 6 deletions(-)
diff -puN arch/ia64/Kconfig~kcore-register-text-area-in-generic-way arch/ia64/Kconfig
--- a/arch/ia64/Kconfig~kcore-register-text-area-in-generic-way
+++ a/arch/ia64/Kconfig
@@ -496,6 +496,10 @@ config HAVE_ARCH_NODEDATA_EXTENSION
def_bool y
depends on NUMA
+config ARCH_PROC_KCORE_TEXT
+ def_bool y
+ depends on PROC_KCORE
+
config IA32_SUPPORT
bool "Support for Linux/x86 binaries"
help
diff -puN arch/ia64/mm/init.c~kcore-register-text-area-in-generic-way arch/ia64/mm/init.c
--- a/arch/ia64/mm/init.c~kcore-register-text-area-in-generic-way
+++ a/arch/ia64/mm/init.c
@@ -617,7 +617,7 @@ mem_init (void)
long reserved_pages, codesize, datasize, initsize;
pg_data_t *pgdat;
int i;
- static struct kcore_list kcore_mem, kcore_kernel;
+ static struct kcore_list kcore_mem;
BUG_ON(PTRS_PER_PGD * sizeof(pgd_t) != PAGE_SIZE);
BUG_ON(PTRS_PER_PMD * sizeof(pmd_t) != PAGE_SIZE);
@@ -640,7 +640,6 @@ mem_init (void)
high_memory = __va(max_low_pfn * PAGE_SIZE);
kclist_add(&kcore_mem, __va(0), max_low_pfn * PAGE_SIZE, KCORE_RAM);
- kclist_add(&kcore_kernel, _stext, _end - _stext, KCORE_TEXT);
for_each_online_pgdat(pgdat)
if (pgdat->bdata->node_bootmem_map)
diff -puN arch/x86/Kconfig~kcore-register-text-area-in-generic-way arch/x86/Kconfig
--- a/arch/x86/Kconfig~kcore-register-text-area-in-generic-way
+++ a/arch/x86/Kconfig
@@ -1251,6 +1251,10 @@ config ARCH_MEMORY_PROBE
def_bool X86_64
depends on MEMORY_HOTPLUG
+config ARCH_PROC_KCORE_TEXT
+ def_bool y
+ depends on X86_64 && PROC_KCORE
+
config ILLEGAL_POINTER_VALUE
hex
default 0 if X86_32
diff -puN arch/x86/mm/init_64.c~kcore-register-text-area-in-generic-way arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c~kcore-register-text-area-in-generic-way
+++ a/arch/x86/mm/init_64.c
@@ -647,8 +647,7 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to
#endif /* CONFIG_MEMORY_HOTPLUG */
-static struct kcore_list kcore_mem, kcore_kernel,
- kcore_modules, kcore_vsyscall;
+static struct kcore_list kcore_mem, kcore_modules, kcore_vsyscall;
void __init mem_init(void)
{
@@ -678,7 +677,6 @@ void __init mem_init(void)
/* Register memory areas for /proc/kcore */
kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
- 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,
diff -puN fs/proc/kcore.c~kcore-register-text-area-in-generic-way fs/proc/kcore.c
--- a/fs/proc/kcore.c~kcore-register-text-area-in-generic-way
+++ a/fs/proc/kcore.c
@@ -21,6 +21,7 @@
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/list.h>
+#include <asm/sections.h>
#define CORE_STR "CORE"
@@ -374,10 +375,26 @@ read_kcore(struct file *file, char __use
static struct kcore_list kcore_vmalloc;
+#ifdef CONFIG_ARCH_PROC_KCORE_TEXT
+static struct kcore_list kcore_text;
+/*
+ * If defined, special segment is used for mapping kernel text instead of
+ * direct-map area. We need to create special TEXT section.
+ */
+static void __init proc_kcore_text_init(void)
+{
+ kclist_add(&kcore_text, _stext, _end - _stext, KCORE_TEXT);
+}
+#else
+static void __init proc_kcore_text_init(void)
+{
+}
+#endif
+
static int __init proc_kcore_init(void)
{
proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &proc_kcore_operations);
-
+ proc_kcore_text_init();
kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
VMALLOC_END - VMALLOC_START, KCORE_VMALLOC);
return 0;
_
Patches currently in -mm which might be from kamezawa.hiroyu@xxxxxxxxxxxxxx are
mm-clean-up-page_remove_rmap.patch
vmscan-throttle-direct-reclaim-when-too-many-pages-are-isolated-already.patch
mm-remove-__addsub_zone_page_state.patch
vmscan-dont-attempt-to-reclaim-anon-page-in-lumpy-reclaim-when-no-swap-space-is-avilable.patch
ksm-add-mmu_notifier-set_pte_at_notify.patch
ksm-first-tidy-up-madvise_vma.patch
ksm-define-madv_mergeable-and-madv_unmergeable.patch
ksm-the-mm-interface-to-ksm.patch
ksm-no-debug-in-page_dup_rmap.patch
ksm-identify-pageksm-pages.patch
ksm-kernel-samepage-merging.patch
ksm-prevent-mremap-move-poisoning.patch
ksm-change-copyright-message.patch
ksm-change-ksm-nice-level-to-be-5.patch
vmalloc-unmap-vmalloc-area-after-hiding-it.patch
kcore-fix-vread-vwrite-to-be-aware-of-holes.patch
kcore-fix-vread-vwrite-to-be-aware-of-holes-update.patch
kcore-proc-kcore-should-use-vread.patch
mm-add_to_swap_cache-must-not-sleep.patch
mm-add_to_swap_cache-does-not-return-eexist.patch
memory-hotplug-fix-updating-of-num_physpages-for-hot-plugged-memory.patch
mm-vmscan-rename-zone_nr_pages-to-zone_lru_nr_pages.patch
mm-do-batched-scans-for-mem_cgroup.patch
vmscan-move-pgdeactivate-modification-to-shrink_active_list.patch
vmscan-move-pgdeactivate-modification-to-shrink_active_list-fix.patch
oom-move-oom_adj-value-from-task_struct-to-signal_struct.patch
oom-make-oom_score-to-per-process-value.patch
oom-oom_kill-doesnt-kill-vfork-parentor-child.patch
oom-fix-oom_adjust_write-input-sanity-check.patch
kcore-fix-proc-kcores-statst_size.patch
kcore-use-usual-list-for-kclist.patch
kcore-add-kclist-types.patch
kcore-register-vmalloc-area-in-generic-way.patch
kcore-register-text-area-in-generic-way.patch
walk-system-ram-range.patch
kcore-use-registerd-physmem-information.patch
kcore-register-vmemmap-range.patch
kcore-register-module-area-in-generic-way.patch
cgroups-support-named-cgroups-hierarchies.patch
cgroups-move-the-cgroup-debug-subsys-into-cgroupc-to-access-internal-state.patch
cgroups-add-a-back-pointer-from-struct-cg_cgroup_link-to-struct-cgroup.patch
cgroups-allow-cgroup-hierarchies-to-be-created-with-no-bound-subsystems.patch
memcg-remove-the-overhead-associated-with-the-root-cgroup.patch
memcg-remove-the-overhead-associated-with-the-root-cgroup-fix.patch
memcg-remove-the-overhead-associated-with-the-root-cgroup-fix-2.patch
memcg-add-comments-explaining-memory-barriers.patch
memcg-add-comments-explaining-memory-barriers-checkpatch-fixes.patch
memory-controller-soft-limit-documentation-v9.patch
memory-controller-soft-limit-interface-v9.patch
memory-controller-soft-limit-organize-cgroups-v9.patch
memory-controller-soft-limit-organize-cgroups-v9-fix.patch
memory-controller-soft-limit-refactor-reclaim-flags-v9.patch
memory-controller-soft-limit-reclaim-on-contention-v9.patch
memory-controller-soft-limit-reclaim-on-contention-v9-fix.patch
memcg-improve-resource-counter-scalability.patch
memcg-improve-resource-counter-scalability-v5.patch
memcg-show-swap-usage-in-stat-file.patch
do_wait-wakeup-optimization-fix-child_wait_callback-eligible_child-usage.patch
do_wait-wakeup-optimization-simplify-task_pid_type.patch
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