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flush cache before installing new page at migraton

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In migration, a new page should be cache flushed before set_pte() in some
archs which have virtually-tagged cache.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KAMEZAWA Hiroyuki 2007-10-16 01:25:43 -07:00 committed by Linus Torvalds
parent 4106f83a9f
commit 97ee052461
1 changed files with 1 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

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mm/migrate.c
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@ -171,6 +171,7 @@ static void remove_migration_pte(struct vm_area_struct *vma,
pte = pte_mkold(mk_pte(new, vma->vm_page_prot)); pte = pte_mkold(mk_pte(new, vma->vm_page_prot));
if (is_write_migration_entry(entry)) if (is_write_migration_entry(entry))
pte = pte_mkwrite(pte); pte = pte_mkwrite(pte);
flush_cache_page(vma, addr, pte_pfn(pte));
set_pte_at(mm, addr, ptep, pte); set_pte_at(mm, addr, ptep, pte);
if (PageAnon(new)) if (PageAnon(new))