[PATCH 4/7] xfs: return maximum free size from xfs_rtany_summary()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Omar Sandoval <osandov@xxxxxx>

Instead of only returning whether there is any free space, return the
maximum size, which is fast thanks to the previous commit. This will be
used by two upcoming optimizations.

Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Omar Sandoval <osandov@xxxxxx>
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
 fs/xfs/xfs_rtalloc.c |   18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)


diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 336c130fc90f..9003acad590d 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -47,7 +47,7 @@ xfs_rtany_summary(
 	int			low,		/* low log2 extent size */
 	int			high,		/* high log2 extent size */
 	xfs_fileoff_t		bbno,		/* bitmap block number */
-	int			*stat)		/* out: any good extents here? */
+	int			*maxlog)	/* out: max log2 extent size free */
 {
 	struct xfs_mount	*mp = args->mount;
 	int			error;		/* error value */
@@ -58,7 +58,7 @@ xfs_rtany_summary(
 	if (mp->m_rsum_cache) {
 		high = min(high, mp->m_rsum_cache[bbno] - 1);
 		if (low > high) {
-			*stat = 0;
+			*maxlog = -1;
 			return 0;
 		}
 	}
@@ -78,14 +78,14 @@ xfs_rtany_summary(
 		 * If there are any, return success.
 		 */
 		if (sum) {
-			*stat = 1;
+			*maxlog = log;
 			goto out;
 		}
 	}
 	/*
 	 * Found nothing, return failure.
 	 */
-	*stat = 0;
+	*maxlog = -1;
 out:
 	/* There were no extents at levels > log. */
 	if (mp->m_rsum_cache && log + 1 < mp->m_rsum_cache[bbno])
@@ -434,7 +434,7 @@ xfs_rtallocate_extent_near(
 	xfs_rtxnum_t		*rtx)		/* out: start rtext allocated */
 {
 	struct xfs_mount	*mp = args->mount;
-	int			any;		/* any useful extents from summary */
+	int			maxlog;		/* max useful extent from summary */
 	xfs_fileoff_t		bbno;		/* bitmap block number */
 	int			error;		/* error value */
 	int			i;		/* bitmap block offset (loop control) */
@@ -488,7 +488,7 @@ xfs_rtallocate_extent_near(
 		 * starting in this bitmap block.
 		 */
 		error = xfs_rtany_summary(args, log2len, mp->m_rsumlevels - 1,
-				bbno + i, &any);
+				bbno + i, &maxlog);
 		if (error) {
 			return error;
 		}
@@ -496,7 +496,7 @@ xfs_rtallocate_extent_near(
 		 * If there are any useful extents starting here, try
 		 * allocating one.
 		 */
-		if (any) {
+		if (maxlog >= 0) {
 			/*
 			 * On the positive side of the starting location.
 			 */
@@ -537,7 +537,7 @@ xfs_rtallocate_extent_near(
 					error = xfs_rtany_summary(args,
 							log2len,
 							mp->m_rsumlevels - 1,
-							bbno + j, &any);
+							bbno + j, &maxlog);
 					if (error) {
 						return error;
 					}
@@ -549,7 +549,7 @@ xfs_rtallocate_extent_near(
 					 * extent given, we've already tried
 					 * that allocation, don't do it again.
 					 */
-					if (any)
+					if (maxlog >= 0)
 						continue;
 					error = xfs_rtallocate_extent_block(args,
 							bbno + j, minlen,




[Index of Archives]     [XFS Filesystem Development (older mail)]     [Linux Filesystem Development]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux RAID]     [Linux SCSI]


  Powered by Linux