linux-kernel - [PATCH v7 16/16] cifs: Enable large folio support

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Date: Tue, 30 Apr 2024 15:09:28 +0100
From: David Howells <dhowells@...hat.com>
To: Steve French <smfrench@...il.com>
Cc: David Howells <dhowells@...hat.com>,
	Jeff Layton <jlayton@...nel.org>,
	Matthew Wilcox <willy@...radead.org>,
	Paulo Alcantara <pc@...guebit.com>,
	Shyam Prasad N <sprasad@...rosoft.com>,
	Tom Talpey <tom@...pey.com>,
	Christian Brauner <christian@...uner.io>,
	netfs@...ts.linux.dev,
	linux-cifs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Steve French <sfrench@...ba.org>,
	Shyam Prasad N <nspmangalore@...il.com>,
	Rohith Surabattula <rohiths.msft@...il.com>
Subject: [PATCH v7 16/16] cifs: Enable large folio support

Now that cifs is using netfslib for its VM interaction, it only sees I/O in
terms of iov_iter iterators and does not see pages or folios.  This makes
large multipage folios transparent to cifs and so we can turn on multipage
folios on regular files.

Signed-off-by: David Howells <dhowells@...hat.com>
cc: Steve French <sfrench@...ba.org>
cc: Shyam Prasad N <nspmangalore@...il.com>
cc: Rohith Surabattula <rohiths.msft@...il.com>
cc: Jeff Layton <jlayton@...nel.org>
cc: linux-cifs@...r.kernel.org
cc: netfs@...ts.linux.dev
cc: linux-fsdevel@...r.kernel.org
cc: linux-mm@...ck.org
---
 fs/smb/client/inode.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
index 5239c823de86..e8bfeea23660 100644
--- a/fs/smb/client/inode.c
+++ b/fs/smb/client/inode.c
@@ -72,6 +72,7 @@ static void cifs_set_ops(struct inode *inode)
 			inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 		else
 			inode->i_data.a_ops = &cifs_addr_ops;
+		mapping_set_large_folios(inode->i_mapping);
 		break;
 	case S_IFDIR:
 		if (IS_AUTOMOUNT(inode)) {