Messages in this thread Patch in this message | | | Subject | [PATCH] Make CONFIG_MIGRATION available for s390 | From | Gerald Schaefer <> | Date | Fri, 04 Jul 2008 16:58:59 +0200 |
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Subject: [PATCH] Make CONFIG_MIGRATION available for s390
From: Gerald Schaefer <gerald.schaefer@de.ibm.com>
We'd like to support CONFIG_MEMORY_HOTREMOVE on s390, which depends on CONFIG_MIGRATION. So far, CONFIG_MIGRATION is only available with NUMA support.
This patch makes CONFIG_MIGRATION selectable for s390. When MIGRATION is enabled w/o NUMA, the kernel won't compile because of a missing "migrate" member in vm_operations_struct and a missing "policy_zone" definition. To avoid this, those are moved from an "#ifdef CONFIG_NUMA" section to "#ifdef CONFIG_MIGRATION".
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> ---
include/linux/mempolicy.h | 6 ++++-- include/linux/mm.h | 2 ++ mm/Kconfig | 2 +- 3 files changed, 7 insertions(+), 3 deletions(-)
Index: mylinux-git/include/linux/mempolicy.h =================================================================== --- mylinux-git.orig/include/linux/mempolicy.h +++ mylinux-git/include/linux/mempolicy.h @@ -62,6 +62,10 @@ enum { struct mm_struct; +#ifdef CONFIG_MIGRATION +extern enum zone_type policy_zone; +#endif + #ifdef CONFIG_NUMA /* @@ -202,8 +206,6 @@ extern struct zonelist *huge_zonelist(st struct mempolicy **mpol, nodemask_t **nodemask); extern unsigned slab_node(struct mempolicy *policy); -extern enum zone_type policy_zone; - static inline void check_highest_zone(enum zone_type k) { if (k > policy_zone && k != ZONE_MOVABLE) Index: mylinux-git/include/linux/mm.h =================================================================== --- mylinux-git.orig/include/linux/mm.h +++ mylinux-git/include/linux/mm.h @@ -193,6 +193,8 @@ struct vm_operations_struct { */ struct mempolicy *(*get_policy)(struct vm_area_struct *vma, unsigned long addr); +#endif +#ifdef CONFIG_MIGRATION int (*migrate)(struct vm_area_struct *vma, const nodemask_t *from, const nodemask_t *to, unsigned long flags); #endif Index: mylinux-git/mm/Kconfig =================================================================== --- mylinux-git.orig/mm/Kconfig +++ mylinux-git/mm/Kconfig @@ -174,7 +174,7 @@ config SPLIT_PTLOCK_CPUS config MIGRATION bool "Page migration" def_bool y - depends on NUMA + depends on NUMA || S390 help Allows the migration of the physical location of pages of processes while the virtual addresses are not changed. This is useful for
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