From: Rik van Riel <riel@conectiva.com.br>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arjan van de Ven <arjanv@redhat.com>, linux-mm@kvack.org
Subject: [PATCH] 8/4 -ac to newer rmap
Date: Wed, 13 Nov 2002 12:50:02 -0200 [thread overview]
Message-ID: <20021113145002Z80339-18062+20@imladris.surriel.com> (raw)
Patch by Paul Mackarras to make sure that remap_pmd_range calls
pte_alloc with the full address, so we don't have pagetables with
wrong pte->mm and pte->index
(ObWork: my patches are sponsored by Conectiva, Inc)
--- linux-2.4.19/mm/memory.c 2002-11-13 08:48:31.000000000 -0200
+++ linux-2.4-rmap/mm/memory.c 2002-11-13 12:10:45.000000000 -0200
@@ -164,6 +164,7 @@ int check_pgt_cache(void)
void clear_page_tables(struct mm_struct *mm, unsigned long first, int nr)
{
pgd_t * page_dir = mm->pgd;
+ unsigned long last = first + nr;
spin_lock(&mm->page_table_lock);
page_dir += first;
@@ -173,6 +175,8 @@ void clear_page_tables(struct mm_struct
} while (--nr);
spin_unlock(&mm->page_table_lock);
+ flush_tlb_pgtables(mm, first * PGDIR_SIZE, last * PGDIR_SIZE);
+
/* keep the page table cache within bounds */
check_pgt_cache();
}
@@ -886,18 +889,19 @@ static inline void remap_pte_range(pte_t
static inline int remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, unsigned long address, unsigned long size,
unsigned long phys_addr, pgprot_t prot)
{
- unsigned long end;
+ unsigned long base, end;
+ base = address & PGDIR_MASK;
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
phys_addr -= address;
do {
- pte_t * pte = pte_alloc(mm, pmd, address);
+ pte_t * pte = pte_alloc(mm, pmd, address + base);
if (!pte)
return -ENOMEM;
- remap_pte_range(pte, address, end - address, address + phys_addr, prot);
+ remap_pte_range(pte, base + address, end - address, address + phys_addr, prot);
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address && (address < end));
--
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reply other threads:[~2002-11-13 14:50 UTC|newest]
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