diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-04-15 14:23:26 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-04-23 17:55:49 +0300 |
| commit | 0b46e0a3ec0d7a04af6a091354f1b5e1b952d70a (patch) | |
| tree | 011ed5650974aad0df2e6a6c9952e1fc2f935dec /arch/s390/include/asm/pgalloc.h | |
| parent | 7e01b5acd88b3f3108d8c4ce44e3205d67437202 (diff) | |
| download | linux-0b46e0a3ec0d7a04af6a091354f1b5e1b952d70a.tar.xz | |
s390/kvm: remove delayed reallocation of page tables for KVM
Replacing a 2K page table with a 4K page table while a VMA is active
for the affected memory region is fundamentally broken. Rip out the
page table reallocation code and replace it with a simple system
control 'vm.allocate_pgste'. If the system control is set the page
tables for all processes are allocated as full 4K pages, even for
processes that do not need it.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/pgalloc.h')
| -rw-r--r-- | arch/s390/include/asm/pgalloc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h index 51e7fb634ebc..7b7858f158b4 100644 --- a/arch/s390/include/asm/pgalloc.h +++ b/arch/s390/include/asm/pgalloc.h @@ -21,6 +21,7 @@ void crst_table_free(struct mm_struct *, unsigned long *); unsigned long *page_table_alloc(struct mm_struct *); void page_table_free(struct mm_struct *, unsigned long *); void page_table_free_rcu(struct mmu_gather *, unsigned long *, unsigned long); +extern int page_table_allocate_pgste; int set_guest_storage_key(struct mm_struct *mm, unsigned long addr, unsigned long key, bool nq); |