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04edf02c
编写于
12月 04, 2017
作者:
M
Matthew Wilcox
浏览文件
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电子邮件补丁
差异文件
fs: Convert writeback to XArray
A couple of short loops. Signed-off-by:
N
Matthew Wilcox
<
willy@infradead.org
>
上级
ec82e1c1
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
9 addition
and
16 deletion
+9
-16
fs/fs-writeback.c
fs/fs-writeback.c
+9
-16
未找到文件。
fs/fs-writeback.c
浏览文件 @
04edf02c
...
...
@@ -339,9 +339,9 @@ static void inode_switch_wbs_work_fn(struct work_struct *work)
struct
address_space
*
mapping
=
inode
->
i_mapping
;
struct
bdi_writeback
*
old_wb
=
inode
->
i_wb
;
struct
bdi_writeback
*
new_wb
=
isw
->
new_wb
;
struct
radix_tree_iter
iter
;
XA_STATE
(
xas
,
&
mapping
->
i_pages
,
0
);
struct
page
*
page
;
bool
switched
=
false
;
void
**
slot
;
/*
* By the time control reaches here, RCU grace period has passed
...
...
@@ -375,25 +375,18 @@ static void inode_switch_wbs_work_fn(struct work_struct *work)
* to possibly dirty pages while PAGECACHE_TAG_WRITEBACK points to
* pages actually under writeback.
*/
radix_tree_for_each_tagged
(
slot
,
&
mapping
->
i_pages
,
&
iter
,
0
,
PAGECACHE_TAG_DIRTY
)
{
struct
page
*
page
=
radix_tree_deref_slot_protected
(
slot
,
&
mapping
->
i_pages
.
xa_lock
);
if
(
likely
(
page
)
&&
PageDirty
(
page
))
{
xas_for_each_marked
(
&
xas
,
page
,
ULONG_MAX
,
PAGECACHE_TAG_DIRTY
)
{
if
(
PageDirty
(
page
))
{
dec_wb_stat
(
old_wb
,
WB_RECLAIMABLE
);
inc_wb_stat
(
new_wb
,
WB_RECLAIMABLE
);
}
}
radix_tree_for_each_tagged
(
slot
,
&
mapping
->
i_pages
,
&
iter
,
0
,
PAGECACHE_TAG_WRITEBACK
)
{
struct
page
*
page
=
radix_tree_deref_slot_protected
(
slot
,
&
mapping
->
i_pages
.
xa_lock
);
if
(
likely
(
page
))
{
WARN_ON_ONCE
(
!
PageWriteback
(
page
));
dec_wb_stat
(
old_wb
,
WB_WRITEBACK
);
inc_wb_stat
(
new_wb
,
WB_WRITEBACK
);
}
xas_set
(
&
xas
,
0
);
xas_for_each_marked
(
&
xas
,
page
,
ULONG_MAX
,
PAGECACHE_TAG_WRITEBACK
)
{
WARN_ON_ONCE
(
!
PageWriteback
(
page
));
dec_wb_stat
(
old_wb
,
WB_WRITEBACK
);
inc_wb_stat
(
new_wb
,
WB_WRITEBACK
);
}
wb_get
(
new_wb
);
...
...
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