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mm: Convert i_mmap_lock to a mutex

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Straightforward conversion of i_mmap_lock to a mutex.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Miller <davem@davemloft.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Tony Luck <tony.luck@intel.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Zijlstra 2011-05-24 17:12:06 -07:00 • committed by Linus Torvalds
parent 97a894136f
commit 3d48ae45e7
17 changed files with 58 additions and 58 deletions
Download patch file Download diff file Expand all files Collapse all files

28
mm/rmap.c
View file

@ -24,7 +24,7 @@
* inode->i_alloc_sem (vmtruncate_range)
* mm->mmap_sem
* page->flags PG_locked (lock_page)
* mapping->i_mmap_lock
* mapping->i_mmap_mutex
* anon_vma->lock
* mm->page_table_lock or pte_lock
* zone->lru_lock (in mark_page_accessed, isolate_lru_page)
@ -646,14 +646,14 @@ static int page_referenced_file(struct page *page,
* The page lock not only makes sure that page->mapping cannot
* suddenly be NULLified by truncation, it makes sure that the
* structure at mapping cannot be freed and reused yet,
* so we can safely take mapping->i_mmap_lock.
* so we can safely take mapping->i_mmap_mutex.
*/
BUG_ON(!PageLocked(page));
spin_lock(&mapping->i_mmap_lock);
mutex_lock(&mapping->i_mmap_mutex);
/*
* i_mmap_lock does not stabilize mapcount at all, but mapcount
* i_mmap_mutex does not stabilize mapcount at all, but mapcount
* is more likely to be accurate if we note it after spinning.
*/
mapcount = page_mapcount(page);
@ -675,7 +675,7 @@ static int page_referenced_file(struct page *page,
break;
}
spin_unlock(&mapping->i_mmap_lock);
mutex_unlock(&mapping->i_mmap_mutex);
return referenced;
}
@ -762,7 +762,7 @@ static int page_mkclean_file(struct address_space *mapping, struct page *page)
BUG_ON(PageAnon(page));
spin_lock(&mapping->i_mmap_lock);
mutex_lock(&mapping->i_mmap_mutex);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
if (vma->vm_flags & VM_SHARED) {
unsigned long address = vma_address(page, vma);
@ -771,7 +771,7 @@ static int page_mkclean_file(struct address_space *mapping, struct page *page)
ret += page_mkclean_one(page, vma, address);
}
}
spin_unlock(&mapping->i_mmap_lock);
mutex_unlock(&mapping->i_mmap_mutex);
return ret;
}
@ -1119,7 +1119,7 @@ out_mlock:
/*
* We need mmap_sem locking, Otherwise VM_LOCKED check makes
* unstable result and race. Plus, We can't wait here because
* we now hold anon_vma->lock or mapping->i_mmap_lock.
* we now hold anon_vma->lock or mapping->i_mmap_mutex.
* if trylock failed, the page remain in evictable lru and later
* vmscan could retry to move the page to unevictable lru if the
* page is actually mlocked.
@ -1345,7 +1345,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags)
unsigned long max_nl_size = 0;
unsigned int mapcount;
spin_lock(&mapping->i_mmap_lock);
mutex_lock(&mapping->i_mmap_mutex);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
unsigned long address = vma_address(page, vma);
if (address == -EFAULT)
@ -1391,7 +1391,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags)
mapcount = page_mapcount(page);
if (!mapcount)
goto out;
cond_resched_lock(&mapping->i_mmap_lock);
cond_resched();
max_nl_size = (max_nl_size + CLUSTER_SIZE - 1) & CLUSTER_MASK;
if (max_nl_cursor == 0)
@ -1413,7 +1413,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags)
}
vma->vm_private_data = (void *) max_nl_cursor;
}
cond_resched_lock(&mapping->i_mmap_lock);
cond_resched();
max_nl_cursor += CLUSTER_SIZE;
} while (max_nl_cursor <= max_nl_size);
@ -1425,7 +1425,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags)
list_for_each_entry(vma, &mapping->i_mmap_nonlinear, shared.vm_set.list)
vma->vm_private_data = NULL;
out:
spin_unlock(&mapping->i_mmap_lock);
mutex_unlock(&mapping->i_mmap_mutex);
return ret;
}
@ -1544,7 +1544,7 @@ static int rmap_walk_file(struct page *page, int (*rmap_one)(struct page *,
if (!mapping)
return ret;
spin_lock(&mapping->i_mmap_lock);
mutex_lock(&mapping->i_mmap_mutex);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
unsigned long address = vma_address(page, vma);
if (address == -EFAULT)
@ -1558,7 +1558,7 @@ static int rmap_walk_file(struct page *page, int (*rmap_one)(struct page *,
* never contain migration ptes. Decide what to do about this
* limitation to linear when we need rmap_walk() on nonlinear.
*/
spin_unlock(&mapping->i_mmap_lock);
mutex_unlock(&mapping->i_mmap_mutex);
return ret;
}