From: Darrick J. Wong <djwong@kernel.org>
Date: Mon, 24 Feb 2025 18:21:55 +0000 (-0800)
Subject: xfs: enable extent size hints for CoW operations
X-Git-Tag: v6.14.0~97
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3ae3aadc4fc328885eb9c14f63cc7f53da8eb146;p=thirdparty%2Fxfsprogs-dev.git

xfs: enable extent size hints for CoW operations

Source kernel commit: 8e84e8052bc283ebb37f929eb9fb97483ea7385e

Wire up the copy-on-write extent size hint for realtime files, and
connect it to the rt allocator so that we avoid fragmentation on rt
filesystems.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---

diff --git a/libxfs/xfs_bmap.c b/libxfs/xfs_bmap.c
index ed969983..1f7326ac 100644
--- a/libxfs/xfs_bmap.c
+++ b/libxfs/xfs_bmap.c
@@ -6518,7 +6518,13 @@ xfs_get_cowextsz_hint(
 	a = 0;
 	if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
 		a = ip->i_cowextsize;
-	b = xfs_get_extsz_hint(ip);
+	if (XFS_IS_REALTIME_INODE(ip)) {
+		b = 0;
+		if (ip->i_diflags & XFS_DIFLAG_EXTSIZE)
+			b = ip->i_extsize;
+	} else {
+		b = xfs_get_extsz_hint(ip);
+	}
 
 	a = max(a, b);
 	if (a == 0)