lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[S390] lockless get_user_pages_fast()

Browse Source 
Implement get_user_pages_fast without locking in the fastpath on s390.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2010-10-25 16:10:11 +02:00
committed by Martin Schwidefsky
parent 87799ebab7
commit 80217147a3
9 changed files with 395 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
arch/s390/include/asm/tlb.h
View File

@@ -64,10 +64,9 @@ static inline void tlb_flush_mmu(struct mmu_gather *tlb,
if (!tlb->fullmm && (tlb->nr_ptes > 0 || tlb->nr_pxds < TLB_NR_PTRS))
__tlb_flush_mm(tlb->mm);
while (tlb->nr_ptes > 0)
pte_free(tlb->mm, tlb->array[--tlb->nr_ptes]);
page_table_free_rcu(tlb->mm, tlb->array[--tlb->nr_ptes]);
while (tlb->nr_pxds < TLB_NR_PTRS)
/* pgd_free frees the pointer as region or segment table */
pgd_free(tlb->mm, tlb->array[tlb->nr_pxds++]);
crst_table_free_rcu(tlb->mm, tlb->array[tlb->nr_pxds++]);
}
static inline void tlb_finish_mmu(struct mmu_gather *tlb,
@@ -75,6 +74,8 @@ static inline void tlb_finish_mmu(struct mmu_gather *tlb,
{
tlb_flush_mmu(tlb, start, end);
rcu_table_freelist_finish();
/* keep the page table cache within bounds */
check_pgt_cache();
@@ -103,7 +104,7 @@ static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
if (tlb->nr_ptes >= tlb->nr_pxds)
tlb_flush_mmu(tlb, 0, 0);
} else
pte_free(tlb->mm, pte);
page_table_free(tlb->mm, (unsigned long *) pte);
}
/*
@@ -124,7 +125,7 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
if (tlb->nr_ptes >= tlb->nr_pxds)
tlb_flush_mmu(tlb, 0, 0);
} else
pmd_free(tlb->mm, pmd);
crst_table_free(tlb->mm, (unsigned long *) pmd);
#endif
}
@@ -146,7 +147,7 @@ static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
if (tlb->nr_ptes >= tlb->nr_pxds)
tlb_flush_mmu(tlb, 0, 0);
} else
pud_free(tlb->mm, pud);
crst_table_free(tlb->mm, (unsigned long *) pud);
#endif
}