f2fs_zero_post_eof_page() may cuase more overhead due to invalidate_lock
and page lookup, change as below to mitigate its overhead:
- check new_size before grabbing invalidate_lock
- lookup and invalidate pages only in range of [old_size, new_size]
Fixes: ba8dac350faf ("f2fs: fix to zero post-eof page")
Signed-off-by: Chao Yu <c...@kernel.org>
---
v2:
- check page number in mapping
fs/f2fs/file.c | 39 +++++++++++++++++++--------------------
1 file changed, 19 insertions(+), 20 deletions(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 1aae4361d0a8..ffa045b39c01 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -35,15 +35,23 @@
#include <trace/events/f2fs.h>
#include <uapi/linux/f2fs.h>
-static void f2fs_zero_post_eof_page(struct inode *inode, loff_t new_size)
+static void f2fs_zero_post_eof_page(struct inode *inode,
+ loff_t new_size, bool lock)
{
loff_t old_size = i_size_read(inode);
if (old_size >= new_size)
return;
+ if (mapping_empty(inode->i_mapping))
+ return;
+
+ if (lock)
+ filemap_invalidate_lock(inode->i_mapping);
/* zero or drop pages only in range of [old_size, new_size] */
- truncate_pagecache(inode, old_size);
+ truncate_inode_pages_range(inode->i_mapping, old_size, new_size);
+ if (lock)
+ filemap_invalidate_unlock(inode->i_mapping);
}
static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
@@ -114,9 +122,7 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
- filemap_invalidate_lock(inode->i_mapping);
- f2fs_zero_post_eof_page(inode, (folio->index + 1) << PAGE_SHIFT);
- filemap_invalidate_unlock(inode->i_mapping);
+ f2fs_zero_post_eof_page(inode, (folio->index + 1) << PAGE_SHIFT, true);
file_update_time(vmf->vma->vm_file);
filemap_invalidate_lock_shared(inode->i_mapping);
@@ -1149,7 +1155,7 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry
*dentry,
filemap_invalidate_lock(inode->i_mapping);
if (attr->ia_size > old_size)
- f2fs_zero_post_eof_page(inode, attr->ia_size);
+ f2fs_zero_post_eof_page(inode, attr->ia_size, false);
truncate_setsize(inode, attr->ia_size);
if (attr->ia_size <= old_size)
@@ -1268,9 +1274,7 @@ static int f2fs_punch_hole(struct inode *inode, loff_t
offset, loff_t len)
if (ret)
return ret;
- filemap_invalidate_lock(inode->i_mapping);
- f2fs_zero_post_eof_page(inode, offset + len);
- filemap_invalidate_unlock(inode->i_mapping);
+ f2fs_zero_post_eof_page(inode, offset + len, true);
pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
@@ -1555,7 +1559,7 @@ static int f2fs_do_collapse(struct inode *inode, loff_t
offset, loff_t len)
f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
filemap_invalidate_lock(inode->i_mapping);
- f2fs_zero_post_eof_page(inode, offset + len);
+ f2fs_zero_post_eof_page(inode, offset + len, false);
f2fs_lock_op(sbi);
f2fs_drop_extent_tree(inode);
@@ -1678,9 +1682,7 @@ static int f2fs_zero_range(struct inode *inode, loff_t
offset, loff_t len,
if (ret)
return ret;
- filemap_invalidate_lock(mapping);
- f2fs_zero_post_eof_page(inode, offset + len);
- filemap_invalidate_unlock(mapping);
+ f2fs_zero_post_eof_page(inode, offset + len, true);
pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
@@ -1814,7 +1816,7 @@ static int f2fs_insert_range(struct inode *inode, loff_t
offset, loff_t len)
f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
filemap_invalidate_lock(mapping);
- f2fs_zero_post_eof_page(inode, offset + len);
+ f2fs_zero_post_eof_page(inode, offset + len, false);
truncate_pagecache(inode, offset);
while (!ret && idx > pg_start) {
@@ -1872,9 +1874,7 @@ static int f2fs_expand_inode_data(struct inode *inode,
loff_t offset,
if (err)
return err;
- filemap_invalidate_lock(inode->i_mapping);
- f2fs_zero_post_eof_page(inode, offset + len);
- filemap_invalidate_unlock(inode->i_mapping);
+ f2fs_zero_post_eof_page(inode, offset + len, true);
f2fs_balance_fs(sbi, true);
@@ -4922,9 +4922,8 @@ static ssize_t f2fs_write_checks(struct kiocb *iocb,
struct iov_iter *from)
if (err)
return err;
- filemap_invalidate_lock(inode->i_mapping);
- f2fs_zero_post_eof_page(inode, iocb->ki_pos + iov_iter_count(from));
- filemap_invalidate_unlock(inode->i_mapping);
+ f2fs_zero_post_eof_page(inode,
+ iocb->ki_pos + iov_iter_count(from), true);
return count;
}
--
2.49.0
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