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Message-ID: <161789067431.6155.8063840447229665720.stgit@warthog.procyon.org.uk>
Date: Thu, 08 Apr 2021 15:04:34 +0100
From: David Howells <dhowells@...hat.com>
To: linux-fsdevel@...r.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
dhowells@...hat.com,
Trond Myklebust <trond.myklebust@...merspace.com>,
Anna Schumaker <anna.schumaker@...app.com>,
Steve French <sfrench@...ba.org>,
Dominique Martinet <asmadeus@...ewreck.org>,
Jeff Layton <jlayton@...hat.com>,
David Wysochanski <dwysocha@...hat.com>,
"Matthew Wilcox (Oracle)" <willy@...radead.org>,
Alexander Viro <viro@...iv.linux.org.uk>,
linux-cachefs@...hat.com, linux-afs@...ts.infradead.org,
linux-nfs@...r.kernel.org, linux-cifs@...r.kernel.org,
ceph-devel@...r.kernel.org, v9fs-developer@...ts.sourceforge.net,
linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH v6 03/30] mm/filemap: Pass the file_ra_state in the ractl
From: Matthew Wilcox (Oracle) <willy@...radead.org>
For readahead_expand(), we need to modify the file ra_state, so pass it
down by adding it to the ractl. We have to do this because it's not always
the same as f_ra in the struct file that is already being passed.
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Signed-off-by: David Howells <dhowells@...hat.com>
Link: https://lore.kernel.org/r/20210407201857.3582797-2-willy@infradead.org/
---
fs/ext4/verity.c | 2 +-
fs/f2fs/file.c | 2 +-
fs/f2fs/verity.c | 2 +-
include/linux/pagemap.h | 20 +++++++++++---------
mm/filemap.c | 4 ++--
mm/internal.h | 7 +++----
mm/readahead.c | 22 +++++++++++-----------
7 files changed, 30 insertions(+), 29 deletions(-)
diff --git a/fs/ext4/verity.c b/fs/ext4/verity.c
index 00e3cbde472e..07438f46b558 100644
--- a/fs/ext4/verity.c
+++ b/fs/ext4/verity.c
@@ -370,7 +370,7 @@ static struct page *ext4_read_merkle_tree_page(struct inode *inode,
pgoff_t index,
unsigned long num_ra_pages)
{
- DEFINE_READAHEAD(ractl, NULL, inode->i_mapping, index);
+ DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, index);
struct page *page;
index += ext4_verity_metadata_pos(inode) >> PAGE_SHIFT;
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index d26ff2ae3f5e..c1e6f669a0c4 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -4051,7 +4051,7 @@ static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg)
static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len)
{
- DEFINE_READAHEAD(ractl, NULL, inode->i_mapping, page_idx);
+ DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, page_idx);
struct address_space *mapping = inode->i_mapping;
struct page *page;
pgoff_t redirty_idx = page_idx;
diff --git a/fs/f2fs/verity.c b/fs/f2fs/verity.c
index 054ec852b5ea..a7beff28a3c5 100644
--- a/fs/f2fs/verity.c
+++ b/fs/f2fs/verity.c
@@ -228,7 +228,7 @@ static struct page *f2fs_read_merkle_tree_page(struct inode *inode,
pgoff_t index,
unsigned long num_ra_pages)
{
- DEFINE_READAHEAD(ractl, NULL, inode->i_mapping, index);
+ DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, index);
struct page *page;
index += f2fs_verity_metadata_pos(inode) >> PAGE_SHIFT;
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 4a7c916abb5c..9a9e558ce4c7 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -811,20 +811,23 @@ static inline int add_to_page_cache(struct page *page,
* @file: The file, used primarily by network filesystems for authentication.
* May be NULL if invoked internally by the filesystem.
* @mapping: Readahead this filesystem object.
+ * @ra: File readahead state. May be NULL.
*/
struct readahead_control {
struct file *file;
struct address_space *mapping;
+ struct file_ra_state *ra;
/* private: use the readahead_* accessors instead */
pgoff_t _index;
unsigned int _nr_pages;
unsigned int _batch_count;
};
-#define DEFINE_READAHEAD(rac, f, m, i) \
- struct readahead_control rac = { \
+#define DEFINE_READAHEAD(ractl, f, r, m, i) \
+ struct readahead_control ractl = { \
.file = f, \
.mapping = m, \
+ .ra = r, \
._index = i, \
}
@@ -832,10 +835,9 @@ struct readahead_control {
void page_cache_ra_unbounded(struct readahead_control *,
unsigned long nr_to_read, unsigned long lookahead_count);
-void page_cache_sync_ra(struct readahead_control *, struct file_ra_state *,
+void page_cache_sync_ra(struct readahead_control *, unsigned long req_count);
+void page_cache_async_ra(struct readahead_control *, struct page *,
unsigned long req_count);
-void page_cache_async_ra(struct readahead_control *, struct file_ra_state *,
- struct page *, unsigned long req_count);
/**
* page_cache_sync_readahead - generic file readahead
@@ -855,8 +857,8 @@ void page_cache_sync_readahead(struct address_space *mapping,
struct file_ra_state *ra, struct file *file, pgoff_t index,
unsigned long req_count)
{
- DEFINE_READAHEAD(ractl, file, mapping, index);
- page_cache_sync_ra(&ractl, ra, req_count);
+ DEFINE_READAHEAD(ractl, file, ra, mapping, index);
+ page_cache_sync_ra(&ractl, req_count);
}
/**
@@ -878,8 +880,8 @@ void page_cache_async_readahead(struct address_space *mapping,
struct file_ra_state *ra, struct file *file,
struct page *page, pgoff_t index, unsigned long req_count)
{
- DEFINE_READAHEAD(ractl, file, mapping, index);
- page_cache_async_ra(&ractl, ra, page, req_count);
+ DEFINE_READAHEAD(ractl, file, ra, mapping, index);
+ page_cache_async_ra(&ractl, page, req_count);
}
/**
diff --git a/mm/filemap.c b/mm/filemap.c
index 788b71e8a72d..0ce93c8799ca 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2830,7 +2830,7 @@ static struct file *do_sync_mmap_readahead(struct vm_fault *vmf)
struct file *file = vmf->vma->vm_file;
struct file_ra_state *ra = &file->f_ra;
struct address_space *mapping = file->f_mapping;
- DEFINE_READAHEAD(ractl, file, mapping, vmf->pgoff);
+ DEFINE_READAHEAD(ractl, file, ra, mapping, vmf->pgoff);
struct file *fpin = NULL;
unsigned int mmap_miss;
@@ -2842,7 +2842,7 @@ static struct file *do_sync_mmap_readahead(struct vm_fault *vmf)
if (vmf->vma->vm_flags & VM_SEQ_READ) {
fpin = maybe_unlock_mmap_for_io(vmf, fpin);
- page_cache_sync_ra(&ractl, ra, ra->ra_pages);
+ page_cache_sync_ra(&ractl, ra->ra_pages);
return fpin;
}
diff --git a/mm/internal.h b/mm/internal.h
index 1432feec62df..83a07b2a7b1f 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -51,13 +51,12 @@ void unmap_page_range(struct mmu_gather *tlb,
void do_page_cache_ra(struct readahead_control *, unsigned long nr_to_read,
unsigned long lookahead_size);
-void force_page_cache_ra(struct readahead_control *, struct file_ra_state *,
- unsigned long nr);
+void force_page_cache_ra(struct readahead_control *, unsigned long nr);
static inline void force_page_cache_readahead(struct address_space *mapping,
struct file *file, pgoff_t index, unsigned long nr_to_read)
{
- DEFINE_READAHEAD(ractl, file, mapping, index);
- force_page_cache_ra(&ractl, &file->f_ra, nr_to_read);
+ DEFINE_READAHEAD(ractl, file, &file->f_ra, mapping, index);
+ force_page_cache_ra(&ractl, nr_to_read);
}
unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
diff --git a/mm/readahead.c b/mm/readahead.c
index c5b0457415be..2088569a947e 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -272,9 +272,10 @@ void do_page_cache_ra(struct readahead_control *ractl,
* memory at once.
*/
void force_page_cache_ra(struct readahead_control *ractl,
- struct file_ra_state *ra, unsigned long nr_to_read)
+ unsigned long nr_to_read)
{
struct address_space *mapping = ractl->mapping;
+ struct file_ra_state *ra = ractl->ra;
struct backing_dev_info *bdi = inode_to_bdi(mapping->host);
unsigned long max_pages, index;
@@ -433,10 +434,10 @@ static int try_context_readahead(struct address_space *mapping,
* A minimal readahead algorithm for trivial sequential/random reads.
*/
static void ondemand_readahead(struct readahead_control *ractl,
- struct file_ra_state *ra, bool hit_readahead_marker,
- unsigned long req_size)
+ bool hit_readahead_marker, unsigned long req_size)
{
struct backing_dev_info *bdi = inode_to_bdi(ractl->mapping->host);
+ struct file_ra_state *ra = ractl->ra;
unsigned long max_pages = ra->ra_pages;
unsigned long add_pages;
unsigned long index = readahead_index(ractl);
@@ -550,7 +551,7 @@ static void ondemand_readahead(struct readahead_control *ractl,
}
void page_cache_sync_ra(struct readahead_control *ractl,
- struct file_ra_state *ra, unsigned long req_count)
+ unsigned long req_count)
{
bool do_forced_ra = ractl->file && (ractl->file->f_mode & FMODE_RANDOM);
@@ -560,7 +561,7 @@ void page_cache_sync_ra(struct readahead_control *ractl,
* read-ahead will do the right thing and limit the read to just the
* requested range, which we'll set to 1 page for this case.
*/
- if (!ra->ra_pages || blk_cgroup_congested()) {
+ if (!ractl->ra->ra_pages || blk_cgroup_congested()) {
if (!ractl->file)
return;
req_count = 1;
@@ -569,21 +570,20 @@ void page_cache_sync_ra(struct readahead_control *ractl,
/* be dumb */
if (do_forced_ra) {
- force_page_cache_ra(ractl, ra, req_count);
+ force_page_cache_ra(ractl, req_count);
return;
}
/* do read-ahead */
- ondemand_readahead(ractl, ra, false, req_count);
+ ondemand_readahead(ractl, false, req_count);
}
EXPORT_SYMBOL_GPL(page_cache_sync_ra);
void page_cache_async_ra(struct readahead_control *ractl,
- struct file_ra_state *ra, struct page *page,
- unsigned long req_count)
+ struct page *page, unsigned long req_count)
{
/* no read-ahead */
- if (!ra->ra_pages)
+ if (!ractl->ra->ra_pages)
return;
/*
@@ -604,7 +604,7 @@ void page_cache_async_ra(struct readahead_control *ractl,
return;
/* do read-ahead */
- ondemand_readahead(ractl, ra, true, req_count);
+ ondemand_readahead(ractl, true, req_count);
}
EXPORT_SYMBOL_GPL(page_cache_async_ra);
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