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ext4: add large folios support for moving extents

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Pass the moving extent length into mext_folio_double_lock() so that it
can acquire a higher-order folio if the length exceeds PAGE_SIZE. This
can speed up extent moving when the extent is larger than one page.
Additionally, remove the unnecessary comments from
mext_folio_double_lock().

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Message-ID: <20251013015128.499308-12-yi.zhang@huaweicloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Zhang Yi 2025-10-13 09:51:27 +08:00 committed by Theodore Ts'o
parent 4589c4518f
commit 65097262f5
1 changed files with 10 additions and 17 deletions
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27
fs/ext4/move_extent.c
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@ -54,23 +54,14 @@ ext4_double_up_write_data_sem(struct inode *orig_inode,
up_write(&EXT4_I(donor_inode)->i_data_sem);
}
/**
* mext_folio_double_lock - Grab and lock folio on both @inode1 and @inode2
*
* @inode1: the inode structure
* @inode2: the inode structure
* @index1: folio index
* @index2: folio index
* @folio: result folio vector
*
* Grab two locked folio for inode's by inode order
*/
static int
mext_folio_double_lock(struct inode *inode1, struct inode *inode2,
pgoff_t index1, pgoff_t index2, struct folio *folio[2])
/* Grab and lock folio on both @inode1 and @inode2 by inode order. */
static int mext_folio_double_lock(struct inode *inode1, struct inode *inode2,
pgoff_t index1, pgoff_t index2, size_t len,
struct folio *folio[2])
{
struct address_space *mapping[2];
unsigned int flags;
fgf_t fgp_flags = FGP_WRITEBEGIN;
BUG_ON(!inode1 || !inode2);
if (inode1 < inode2) {
@ -83,14 +74,15 @@ mext_folio_double_lock(struct inode *inode1, struct inode *inode2,
}
flags = memalloc_nofs_save();
folio[0] = __filemap_get_folio(mapping[0], index1, FGP_WRITEBEGIN,
fgp_flags |= fgf_set_order(len);
folio[0] = __filemap_get_folio(mapping[0], index1, fgp_flags,
mapping_gfp_mask(mapping[0]));
if (IS_ERR(folio[0])) {
memalloc_nofs_restore(flags);
return PTR_ERR(folio[0]);
}
folio[1] = __filemap_get_folio(mapping[1], index2, FGP_WRITEBEGIN,
folio[1] = __filemap_get_folio(mapping[1], index2, fgp_flags,
mapping_gfp_mask(mapping[1]));
memalloc_nofs_restore(flags);
if (IS_ERR(folio[1])) {
@ -214,7 +206,8 @@ static int mext_move_begin(struct mext_data *mext, struct folio *folio[2],
orig_pos = ((loff_t)mext->orig_map.m_lblk) << blkbits;
donor_pos = ((loff_t)mext->donor_lblk) << blkbits;
ret = mext_folio_double_lock(orig_inode, donor_inode,
orig_pos >> PAGE_SHIFT, donor_pos >> PAGE_SHIFT, folio);
orig_pos >> PAGE_SHIFT, donor_pos >> PAGE_SHIFT,
((size_t)mext->orig_map.m_len) << blkbits, folio);
if (ret)
return ret;