mm: remove lru parameter from __pagevec_lru_add and remove parts of pagevec API
Now that the LRU to add a page to is decided at LRU-add time, remove the
misleading lru parameter from __pagevec_lru_add. A consequence of this
is that the pagevec_lru_add_file, pagevec_lru_add_anon and similar
helpers are misleading as the caller no longer has direct control over
what LRU the page is added to. Unused helpers are removed by this patch
and existing users of pagevec_lru_add_file() are converted to use
lru_cache_add_file() directly and use the per-cpu pagevecs instead of
creating their own pagevec.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Alexey Lyahkov <alexey.lyashkov@gmail.com>
Cc: Andrew Perepechko <anserper@ya.ru>
Cc: Robin Dong <sanbai@taobao.com>
Cc: Theodore Tso <tytso@mit.edu>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Bernd Schubert <bernd.schubert@fastmail.fm>
Cc: David Howells <dhowells@redhat.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 317f9ee..ebaff36 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -12,6 +12,7 @@
#include <linux/mount.h>
#include <linux/slab.h>
#include <linux/file.h>
+#include <linux/swap.h>
#include "internal.h"
/*
@@ -227,8 +228,7 @@
*/
static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
struct fscache_retrieval *op,
- struct page *netpage,
- struct pagevec *pagevec)
+ struct page *netpage)
{
struct cachefiles_one_read *monitor;
struct address_space *bmapping;
@@ -237,8 +237,6 @@
_enter("");
- pagevec_reinit(pagevec);
-
_debug("read back %p{%lu,%d}",
netpage, netpage->index, page_count(netpage));
@@ -283,9 +281,7 @@
backpage = newpage;
newpage = NULL;
- page_cache_get(backpage);
- pagevec_add(pagevec, backpage);
- __pagevec_lru_add_file(pagevec);
+ lru_cache_add_file(backpage);
read_backing_page:
ret = bmapping->a_ops->readpage(NULL, backpage);
@@ -452,8 +448,7 @@
if (block) {
/* submit the apparently valid page to the backing fs to be
* read from disk */
- ret = cachefiles_read_backing_file_one(object, op, page,
- &pagevec);
+ ret = cachefiles_read_backing_file_one(object, op, page);
} else if (cachefiles_has_space(cache, 0, 1) == 0) {
/* there's space in the cache we can use */
fscache_mark_page_cached(op, page);
@@ -482,14 +477,11 @@
{
struct cachefiles_one_read *monitor = NULL;
struct address_space *bmapping = object->backer->d_inode->i_mapping;
- struct pagevec lru_pvec;
struct page *newpage = NULL, *netpage, *_n, *backpage = NULL;
int ret = 0;
_enter("");
- pagevec_init(&lru_pvec, 0);
-
list_for_each_entry_safe(netpage, _n, list, lru) {
list_del(&netpage->lru);
@@ -534,9 +526,7 @@
backpage = newpage;
newpage = NULL;
- page_cache_get(backpage);
- if (!pagevec_add(&lru_pvec, backpage))
- __pagevec_lru_add_file(&lru_pvec);
+ lru_cache_add_file(backpage);
reread_backing_page:
ret = bmapping->a_ops->readpage(NULL, backpage);
@@ -559,9 +549,7 @@
goto nomem;
}
- page_cache_get(netpage);
- if (!pagevec_add(&lru_pvec, netpage))
- __pagevec_lru_add_file(&lru_pvec);
+ lru_cache_add_file(netpage);
/* install a monitor */
page_cache_get(netpage);
@@ -643,9 +631,7 @@
fscache_mark_page_cached(op, netpage);
- page_cache_get(netpage);
- if (!pagevec_add(&lru_pvec, netpage))
- __pagevec_lru_add_file(&lru_pvec);
+ lru_cache_add_file(netpage);
/* the netpage is unlocked and marked up to date here */
fscache_end_io(op, netpage, 0);
@@ -661,8 +647,6 @@
out:
/* tidy up */
- pagevec_lru_add_file(&lru_pvec);
-
if (newpage)
page_cache_release(newpage);
if (netpage)