linux-ext4 - [PATCH 16/31] fuse: implement large folios for iomap pagecache files

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Message-ID: <176169810700.1424854.5753715202341698632.stgit@frogsfrogsfrogs>
Date: Tue, 28 Oct 2025 17:49:07 -0700
From: "Darrick J. Wong" <djwong@...nel.org>
To: djwong@...nel.org, miklos@...redi.hu
Cc: joannelkoong@...il.com, bernd@...ernd.com, neal@...pa.dev,
 linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH 16/31] fuse: implement large folios for iomap pagecache files

From: Darrick J. Wong <djwong@...nel.org>

Use large folios when we're using iomap.

Signed-off-by: "Darrick J. Wong" <djwong@...nel.org>
---
 fs/fuse/file_iomap.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fs/fuse/file_iomap.c b/fs/fuse/file_iomap.c
index 897a07f197c797..0bae356045638b 100644
--- a/fs/fuse/file_iomap.c
+++ b/fs/fuse/file_iomap.c
@@ -1380,12 +1380,18 @@ static const struct address_space_operations fuse_iomap_aops = {
 static inline void fuse_inode_set_iomap(struct inode *inode)
 {
 	struct fuse_inode *fi = get_fuse_inode(inode);
+	unsigned int min_order = 0;

 	inode->i_data.a_ops = &fuse_iomap_aops;

 	INIT_WORK(&fi->ioend_work, fuse_iomap_end_io);
 	INIT_LIST_HEAD(&fi->ioend_list);
 	spin_lock_init(&fi->ioend_lock);
+
+	if (inode->i_blkbits > PAGE_SHIFT)
+		min_order = inode->i_blkbits - PAGE_SHIFT;
+
+	mapping_set_folio_min_order(inode->i_mapping, min_order);
 	set_bit(FUSE_I_IOMAP, &fi->state);
 }