[PATCH v4 1/2] mm: Allow the page cache to allocate large pages
From: William Kucharski
Date: Thu Aug 15 2019 - 01:40:13 EST
Add an 'order' argument to __page_cache_alloc() and
do_read_cache_page(). Ensure the allocated pages are compound pages.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: William Kucharski <william.kucharski@xxxxxxxxxx>
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
---
fs/afs/dir.c | 2 +-
fs/btrfs/compression.c | 2 +-
fs/cachefiles/rdwr.c | 4 ++--
fs/ceph/addr.c | 2 +-
fs/ceph/file.c | 2 +-
include/linux/pagemap.h | 10 ++++++----
mm/filemap.c | 20 +++++++++++---------
mm/readahead.c | 2 +-
net/ceph/pagelist.c | 4 ++--
net/ceph/pagevec.c | 2 +-
10 files changed, 27 insertions(+), 23 deletions(-)
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index e640d67274be..0a392214f71e 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -274,7 +274,7 @@ static struct afs_read *afs_read_dir(struct afs_vnode *dvnode, struct key *key)
afs_stat_v(dvnode, n_inval);
ret = -ENOMEM;
- req->pages[i] = __page_cache_alloc(gfp);
+ req->pages[i] = __page_cache_alloc(gfp, 0);
if (!req->pages[i])
goto error;
ret = add_to_page_cache_lru(req->pages[i],
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 60c47b417a4b..5280e7477b7e 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -466,7 +466,7 @@ static noinline int add_ra_bio_pages(struct inode *inode,
}
page = __page_cache_alloc(mapping_gfp_constraint(mapping,
- ~__GFP_FS));
+ ~__GFP_FS), 0);
if (!page)
break;
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 44a3ce1e4ce4..11d30212745f 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -259,7 +259,7 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
goto backing_page_already_present;
if (!newpage) {
- newpage = __page_cache_alloc(cachefiles_gfp);
+ newpage = __page_cache_alloc(cachefiles_gfp, 0);
if (!newpage)
goto nomem_monitor;
}
@@ -495,7 +495,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
goto backing_page_already_present;
if (!newpage) {
- newpage = __page_cache_alloc(cachefiles_gfp);
+ newpage = __page_cache_alloc(cachefiles_gfp, 0);
if (!newpage)
goto nomem;
}
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index e078cc55b989..bcb41fbee533 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1707,7 +1707,7 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page)
if (len > PAGE_SIZE)
len = PAGE_SIZE;
} else {
- page = __page_cache_alloc(GFP_NOFS);
+ page = __page_cache_alloc(GFP_NOFS, 0);
if (!page) {
err = -ENOMEM;
goto out;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 685a03cc4b77..ae58d7c31aa4 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1305,7 +1305,7 @@ static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
struct page *page = NULL;
loff_t i_size;
if (retry_op == READ_INLINE) {
- page = __page_cache_alloc(GFP_KERNEL);
+ page = __page_cache_alloc(GFP_KERNEL, 0);
if (!page)
return -ENOMEM;
}
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index c7552459a15f..92e026d9a6b7 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -208,17 +208,19 @@ static inline int page_cache_add_speculative(struct page *page, int count)
}
#ifdef CONFIG_NUMA
-extern struct page *__page_cache_alloc(gfp_t gfp);
+extern struct page *__page_cache_alloc(gfp_t gfp, unsigned int order);
#else
-static inline struct page *__page_cache_alloc(gfp_t gfp)
+static inline struct page *__page_cache_alloc(gfp_t gfp, unsigned int order)
{
- return alloc_pages(gfp, 0);
+ if (order > 0)
+ gfp |= __GFP_COMP;
+ return alloc_pages(gfp, order);
}
#endif
static inline struct page *page_cache_alloc(struct address_space *x)
{
- return __page_cache_alloc(mapping_gfp_mask(x));
+ return __page_cache_alloc(mapping_gfp_mask(x), 0);
}
static inline gfp_t readahead_gfp_mask(struct address_space *x)
diff --git a/mm/filemap.c b/mm/filemap.c
index d0cf700bf201..38b46fc00855 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -954,22 +954,25 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
EXPORT_SYMBOL_GPL(add_to_page_cache_lru);
#ifdef CONFIG_NUMA
-struct page *__page_cache_alloc(gfp_t gfp)
+struct page *__page_cache_alloc(gfp_t gfp, unsigned int order)
{
int n;
struct page *page;
+ if (order > 0)
+ gfp |= __GFP_COMP;
+
if (cpuset_do_page_mem_spread()) {
unsigned int cpuset_mems_cookie;
do {
cpuset_mems_cookie = read_mems_allowed_begin();
n = cpuset_mem_spread_node();
- page = __alloc_pages_node(n, gfp, 0);
+ page = __alloc_pages_node(n, gfp, order);
} while (!page && read_mems_allowed_retry(cpuset_mems_cookie));
return page;
}
- return alloc_pages(gfp, 0);
+ return alloc_pages(gfp, order);
}
EXPORT_SYMBOL(__page_cache_alloc);
#endif
@@ -1665,7 +1668,7 @@ struct page *pagecache_get_page(struct address_space *mapping, pgoff_t offset,
if (fgp_flags & FGP_NOFS)
gfp_mask &= ~__GFP_FS;
- page = __page_cache_alloc(gfp_mask);
+ page = __page_cache_alloc(gfp_mask, 0);
if (!page)
return NULL;
@@ -2802,15 +2805,14 @@ static struct page *wait_on_page_read(struct page *page)
static struct page *do_read_cache_page(struct address_space *mapping,
pgoff_t index,
int (*filler)(void *, struct page *),
- void *data,
- gfp_t gfp)
+ void *data, unsigned int order, gfp_t gfp)
{
struct page *page;
int err;
repeat:
page = find_get_page(mapping, index);
if (!page) {
- page = __page_cache_alloc(gfp);
+ page = __page_cache_alloc(gfp, order);
if (!page)
return ERR_PTR(-ENOMEM);
err = add_to_page_cache_lru(page, mapping, index, gfp);
@@ -2917,7 +2919,7 @@ struct page *read_cache_page(struct address_space *mapping,
int (*filler)(void *, struct page *),
void *data)
{
- return do_read_cache_page(mapping, index, filler, data,
+ return do_read_cache_page(mapping, index, filler, data, 0,
mapping_gfp_mask(mapping));
}
EXPORT_SYMBOL(read_cache_page);
@@ -2939,7 +2941,7 @@ struct page *read_cache_page_gfp(struct address_space *mapping,
pgoff_t index,
gfp_t gfp)
{
- return do_read_cache_page(mapping, index, NULL, NULL, gfp);
+ return do_read_cache_page(mapping, index, NULL, NULL, 0, gfp);
}
EXPORT_SYMBOL(read_cache_page_gfp);
diff --git a/mm/readahead.c b/mm/readahead.c
index 2fe72cd29b47..954760a612ea 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -193,7 +193,7 @@ unsigned int __do_page_cache_readahead(struct address_space *mapping,
continue;
}
- page = __page_cache_alloc(gfp_mask);
+ page = __page_cache_alloc(gfp_mask, 0);
if (!page)
break;
page->index = page_offset;
diff --git a/net/ceph/pagelist.c b/net/ceph/pagelist.c
index 65e34f78b05d..0c3face908dc 100644
--- a/net/ceph/pagelist.c
+++ b/net/ceph/pagelist.c
@@ -56,7 +56,7 @@ static int ceph_pagelist_addpage(struct ceph_pagelist *pl)
struct page *page;
if (!pl->num_pages_free) {
- page = __page_cache_alloc(GFP_NOFS);
+ page = __page_cache_alloc(GFP_NOFS, 0);
} else {
page = list_first_entry(&pl->free_list, struct page, lru);
list_del(&page->lru);
@@ -107,7 +107,7 @@ int ceph_pagelist_reserve(struct ceph_pagelist *pl, size_t space)
space = (space + PAGE_SIZE - 1) >> PAGE_SHIFT; /* conv to num pages */
while (space > pl->num_pages_free) {
- struct page *page = __page_cache_alloc(GFP_NOFS);
+ struct page *page = __page_cache_alloc(GFP_NOFS, 0);
if (!page)
return -ENOMEM;
list_add_tail(&page->lru, &pl->free_list);
diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c
index 64305e7056a1..1d07e639216d 100644
--- a/net/ceph/pagevec.c
+++ b/net/ceph/pagevec.c
@@ -45,7 +45,7 @@ struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags)
if (!pages)
return ERR_PTR(-ENOMEM);
for (i = 0; i < num_pages; i++) {
- pages[i] = __page_cache_alloc(flags);
+ pages[i] = __page_cache_alloc(flags, 0);
if (pages[i] == NULL) {
ceph_release_page_vector(pages, i);
return ERR_PTR(-ENOMEM);
--
2.21.0