projects / people / pmueller / ipfire-2.x.git / blame
| Commit | Line | Data |
|---|---|---|
| 2cb7cef9 BS |
1 | From: Jeff Mahoney <jeffm@suse.com> |
| 2 | Subject: [PATCH] s390: Define FREE_PTE_NR | |
| 3 | Patch-mainline: Never, unless FREE_PTE_NR is used in generic code | |
| 4 | ||
| 5 | Commit ba8a9229ab9e80278c28ad68b15053f65b2b0a7c from | |
| 6 | Martin Schwidefsky <schwidefsky@de.ibm.com> removed the | |
| 7 | #include <asm-generic/tlb.h> from asm-s390/tlb.h when he defined the | |
| 8 | s390-specific TLB operations. | |
| 9 | ||
| 10 | FREE_PTR_NR is generally an internal-only value, but our unmap_vmas-lat | |
| 11 | patch uses it to make smarter decisions about dumping PTEs in chunks. | |
| 12 | ||
| 13 | This patch restores the generic value in asm-s390/tlb.h. Since it's only | |
| 14 | used for an optimization, this should be safe. | |
| 15 | ||
| 16 | Signed-off-by: Jeff Mahoney <jeffm@suse.com> | |
| 17 | ||
| 18 | --- | |
| 19 | arch/s390/include/asm/tlb.h | 13 +++++++++++++ | |
| 20 | 1 file changed, 13 insertions(+) | |
| 21 | ||
| 22 | --- a/arch/s390/include/asm/tlb.h | |
| 23 | +++ b/arch/s390/include/asm/tlb.h | |
| 24 | @@ -34,6 +34,19 @@ | |
| 25 | #define TLB_NR_PTRS 508 | |
| 26 | #endif | |
| 27 | ||
| 28 | +/* Lifted from asm-generic/tlb.h; Is used by patches.suse/unmap_vmas-lat */ | |
| 29 | +/* | |
| 30 | + * For UP we don't need to worry about TLB flush | |
| 31 | + * and page free order so much.. | |
| 32 | + */ | |
| 33 | +#ifdef CONFIG_SMP | |
| 34 | + #define FREE_PTE_NR 506 | |
| 35 | + #define tlb_fast_mode(tlb) ((tlb)->nr == ~0U) | |
| 36 | +#else | |
| 37 | + #define FREE_PTE_NR 1 | |
| 38 | + #define tlb_fast_mode(tlb) 1 | |
| 39 | +#endif | |
| 40 | + | |
| 41 | struct mmu_gather { | |
| 42 | struct mm_struct *mm; | |
| 43 | unsigned int fullmm; |