The patch titled
Account for module percpu space separately from kernel percpu
has been added to the -mm tree. Its filename is
account-for-module-percpu-space-separately-from-kernel.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Account for module percpu space separately from kernel percpu
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Rather than using a single constant PERCPU_ENOUGH_ROOM, compute it as the
sum of kernel_percpu + PERCPU_MODULE_RESERVE. This is now common to all
architectures; if an architecture wants to set PERCPU_ENOUGH_ROOM to
something special, then it may do so (ia64 is the only one which does).
Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-alpha/percpu.h | 14 --------------
include/asm-sparc64/percpu.h | 10 ----------
include/asm-x86_64/percpu.h | 10 ----------
include/linux/percpu.h | 9 ++++++++-
init/main.c | 7 ++-----
kernel/module.c | 2 +-
6 files changed, 11 insertions(+), 41 deletions(-)
diff -puN include/asm-alpha/percpu.h~account-for-module-percpu-space-separately-from-kernel include/asm-alpha/percpu.h
--- a/include/asm-alpha/percpu.h~account-for-module-percpu-space-separately-from-kernel
+++ a/include/asm-alpha/percpu.h
@@ -1,20 +1,6 @@
#ifndef __ALPHA_PERCPU_H
#define __ALPHA_PERCPU_H
-/*
- * Increase the per cpu area for Alpha so that
- * modules using percpu area can load.
- */
-#ifdef CONFIG_MODULES
-# define PERCPU_MODULE_RESERVE 8192
-#else
-# define PERCPU_MODULE_RESERVE 0
-#endif
-
-#define PERCPU_ENOUGH_ROOM \
- (ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \
- PERCPU_MODULE_RESERVE)
-
#include <asm-generic/percpu.h>
#endif /* __ALPHA_PERCPU_H */
diff -puN include/asm-sparc64/percpu.h~account-for-module-percpu-space-separately-from-kernel include/asm-sparc64/percpu.h
--- a/include/asm-sparc64/percpu.h~account-for-module-percpu-space-separately-from-kernel
+++ a/include/asm-sparc64/percpu.h
@@ -5,16 +5,6 @@
#ifdef CONFIG_SMP
-#ifdef CONFIG_MODULES
-# define PERCPU_MODULE_RESERVE 8192
-#else
-# define PERCPU_MODULE_RESERVE 0
-#endif
-
-#define PERCPU_ENOUGH_ROOM \
- (ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \
- PERCPU_MODULE_RESERVE)
-
extern void setup_per_cpu_areas(void);
extern unsigned long __per_cpu_base;
diff -puN include/asm-x86_64/percpu.h~account-for-module-percpu-space-separately-from-kernel include/asm-x86_64/percpu.h
--- a/include/asm-x86_64/percpu.h~account-for-module-percpu-space-separately-from-kernel
+++ a/include/asm-x86_64/percpu.h
@@ -11,16 +11,6 @@
#include <asm/pda.h>
-#ifdef CONFIG_MODULES
-# define PERCPU_MODULE_RESERVE 8192
-#else
-# define PERCPU_MODULE_RESERVE 0
-#endif
-
-#define PERCPU_ENOUGH_ROOM \
- (ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \
- PERCPU_MODULE_RESERVE)
-
#define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset)
#define __my_cpu_offset() read_pda(data_offset)
diff -puN include/linux/percpu.h~account-for-module-percpu-space-separately-from-kernel include/linux/percpu.h
--- a/include/linux/percpu.h~account-for-module-percpu-space-separately-from-kernel
+++ a/include/linux/percpu.h
@@ -11,9 +11,16 @@
/* Enough to cover all DEFINE_PER_CPUs in kernel, including modules. */
#ifndef PERCPU_ENOUGH_ROOM
-#define PERCPU_ENOUGH_ROOM 32768
+#ifdef CONFIG_MODULES
+#define PERCPU_MODULE_RESERVE 8192
+#else
+#define PERCPU_MODULE_RESERVE 0
#endif
+#define PERCPU_ENOUGH_ROOM \
+ (__per_cpu_end - __per_cpu_start + PERCPU_MODULE_RESERVE)
+#endif /* PERCPU_ENOUGH_ROOM */
+
/*
* Must be an lvalue. Since @var must be a simple identifier,
* we force a syntax error here if it isn't.
diff -puN init/main.c~account-for-module-percpu-space-separately-from-kernel init/main.c
--- a/init/main.c~account-for-module-percpu-space-separately-from-kernel
+++ a/init/main.c
@@ -369,11 +369,8 @@ static void __init setup_per_cpu_areas(v
unsigned long nr_possible_cpus = num_possible_cpus();
/* Copy section for each CPU (we discard the original) */
- size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
-#ifdef CONFIG_MODULES
- if (size < PERCPU_ENOUGH_ROOM)
- size = PERCPU_ENOUGH_ROOM;
-#endif
+
+ size = ALIGN(PERCPU_ENOUGH_ROOM, SMP_CACHE_BYTES);
ptr = alloc_bootmem(size * nr_possible_cpus);
for_each_possible_cpu(i) {
diff -puN kernel/module.c~account-for-module-percpu-space-separately-from-kernel kernel/module.c
--- a/kernel/module.c~account-for-module-percpu-space-separately-from-kernel
+++ a/kernel/module.c
@@ -430,7 +430,7 @@ static int percpu_modinit(void)
pcpu_size = kmalloc(sizeof(pcpu_size[0]) * pcpu_num_allocated,
GFP_KERNEL);
/* Static in-kernel percpu data (used). */
- pcpu_size[0] = -ALIGN(__per_cpu_end-__per_cpu_start, SMP_CACHE_BYTES);
+ pcpu_size[0] = -(__per_cpu_end-__per_cpu_start);
/* Free room. */
pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0];
if (pcpu_size[1] < 0) {
_
Patches currently in -mm which might be from jeremy@xxxxxxxx are
proper-fix-for-highmem-kmap_atomic-functions-for-vmi-for-2621.patch
revert-proper-fix-for-highmem-kmap_atomic-functions-for-vmi-for-2621.patch
revert-x86_64-mm-account-for-module-percpu-space-separately-from-kernel-percpu.patch
account-for-module-percpu-space-separately-from-kernel.patch
paravirt_ops-update-maintainers.patch
paravirt_ops-remove-config_debug_paravirt.patch
paravirt_ops-use-paravirt_nop-to-consistently-mark-no-op-operations.patch
paravirt_ops-add-pagetable-accessors-to-pack-and-unpack-pagetable-entries.patch
paravirt_ops-hooks-to-set-up-initial-pagetable.patch
paravirt_ops-allocate-a-fixmap-slot.patch
paravirt_ops-allow-paravirt-backend-to-choose-kernel-pmd-sharing.patch
paravirt_ops-add-hooks-to-intercept-mm-creation-and-destruction.patch
paravirt_ops-rename-struct-paravirt_patch-to-paravirt_patch_site-for-clarity.patch
paravirt_ops-use-patch-site-ids-computed-from-offset-in-paravirt_ops-structure.patch
paravirt_ops-fix-patch-site-clobbers-to-include-return-register.patch
paravirt_ops-consistently-wrap-paravirt-ops-callsites-to-make-them-patchable.patch
paravirt_ops-document-asm-i386-paravirth.patch
paravirt_ops-clean-up-paravirt-patchable-wrappers.patch
paravirt_ops-add-common-patching-machinery.patch
paravirt_ops-add-flush_tlb_others-paravirt_op.patch
paravirt_ops-revert-map_pt_hook.patch
paravirt_ops-add-kmap_atomic_pte-for-mapping-highpte-pages.patch
add-apply_to_page_range-which-applies-a-function-to-a-pte-range.patch
re-enable-vdso-by-default-with-paravirt.patch
remove-noreplacement-option.patch
remove-smp_alt_instructions.patch
rename-the-parainstructions-symbols-to-be-consistent-with-the-others.patch
rename-the-parainstructions-symbols-to-be-consistent-with-the-others-fix.patch
allow-boot-time-disable-of-smp-altinstructions.patch
allow-boot-time-disable-of-paravirt_ops-patching.patch
i386-clean-up-asm-i386-bugsh.patch
x86_64-clean-up-asm-x86_64-bugsh.patch
x86-clean-up-identify_cpu.patch
x86-clean-up-identify_cpu-update.patch
i386-relocate-vdso-elf-headers-to-match-mapped-location-with-compat_vdso.patch
i386-make-compat_vdso-runtime-selectable.patch
maps2-uninline-some-functions-in-the-page-walker.patch
maps2-eliminate-the-pmd_walker-struct-in-the-page-walker.patch
maps2-remove-vma-from-args-in-the-page-walker.patch
maps2-propagate-errors-from-callback-in-page-walker.patch
maps2-add-callbacks-for-each-level-to-page-walker.patch
maps2-move-the-page-walker-code-to-lib.patch
maps2-move-the-page-walker-code-to-lib-fix.patch
maps2-simplify-interdependence-of-proc-pid-maps-and-smaps.patch
maps2-move-clear_refs-code-to-task_mmuc.patch
maps2-regroup-task_mmu-by-interface.patch
maps2-make-proc-pid-smaps-optional-under-config_embedded.patch
maps2-make-proc-pid-clear_refs-option-under-config_embedded.patch
maps2-add-proc-pid-pagemap-interface.patch
maps2-add-proc-kpagemap-interface.patch
fixes-and-cleanups-for-earlyprintk-aka-boot-console.patch
ignore-stolen-time-in-the-softlockup-watchdog.patch
add-touch_all_softlockup_watchdogs.patch
clean-up-elf-note-generation.patch
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