From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id 8E2137F6C for ; Sat, 19 Dec 2015 02:57:24 -0600 (CST) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay2.corp.sgi.com (Postfix) with ESMTP id 72072304053 for ; Sat, 19 Dec 2015 00:57:24 -0800 (PST) Received: from userp1040.oracle.com (userp1040.oracle.com [156.151.31.81]) by cuda.sgi.com with ESMTP id fiFnyl6IgfiZERxf (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Sat, 19 Dec 2015 00:57:22 -0800 (PST) Subject: [PATCH 08/76] xfs: rmap btree add more reserved blocks From: "Darrick J. Wong" Date: Sat, 19 Dec 2015 00:57:14 -0800 Message-ID: <20151219085714.12713.52045.stgit@birch.djwong.org> In-Reply-To: <20151219085622.12713.88678.stgit@birch.djwong.org> References: <20151219085622.12713.88678.stgit@birch.djwong.org> MIME-Version: 1.0 List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: david@fromorbit.com, darrick.wong@oracle.com Cc: Dave Chinner , xfs@oss.sgi.com >>From : Dave Chinner XFS reserves a small amount of space in each AG for the minimum number of free blocks needed for operation. Adding the rmap btree increases the number of reserved blocks, but it also increases the complexity of the calculation as the free inode btree is optional (like the rmbt). Rather than calculate the prealloc blocks every time we need to check it, add a function to calculate it at mount time and store it in the struct xfs_mount, and convert the XFS_PREALLOC_BLOCKS macro just to use the xfs-mount variable directly. Signed-off-by: Dave Chinner --- fs/xfs/libxfs/xfs_alloc.c | 11 +++++++++++ fs/xfs/libxfs/xfs_alloc.h | 2 ++ fs/xfs/libxfs/xfs_format.h | 9 +-------- fs/xfs/xfs_fsops.c | 6 +++--- fs/xfs/xfs_mount.c | 2 ++ fs/xfs/xfs_mount.h | 1 + 6 files changed, 20 insertions(+), 11 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 05c87a2..24032ef 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -49,6 +49,17 @@ STATIC int xfs_alloc_ag_vextent_size(xfs_alloc_arg_t *); STATIC int xfs_alloc_ag_vextent_small(xfs_alloc_arg_t *, xfs_btree_cur_t *, xfs_agblock_t *, xfs_extlen_t *, int *); +xfs_extlen_t +xfs_prealloc_blocks( + struct xfs_mount *mp) +{ + if (xfs_sb_version_hasrmapbt(&mp->m_sb)) + return XFS_RMAP_BLOCK(mp) + 1; + if (xfs_sb_version_hasfinobt(&mp->m_sb)) + return XFS_FIBT_BLOCK(mp) + 1; + return XFS_IBT_BLOCK(mp) + 1; +} + /* * Lookup the record equal to [bno, len] in the btree given by cur. */ diff --git a/fs/xfs/libxfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h index 135eb3d..d260916 100644 --- a/fs/xfs/libxfs/xfs_alloc.h +++ b/fs/xfs/libxfs/xfs_alloc.h @@ -237,4 +237,6 @@ int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp, xfs_agnumber_t agno, int flags, struct xfs_buf **bpp); int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags); +xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp); + #endif /* __XFS_ALLOC_H__ */ diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 5c2703d..28635ea 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -1312,18 +1312,11 @@ typedef __be32 xfs_inobt_ptr_t; */ #define XFS_RMAP_CRC_MAGIC 0x524d4233 /* 'RMB3' */ -/* - * The first data block of an AG depends on whether the filesystem was formatted - * with the finobt feature. If so, account for the finobt reserved root btree - * block. - */ -#define XFS_PREALLOC_BLOCKS(mp) \ +#define XFS_RMAP_BLOCK(mp) \ (xfs_sb_version_hasfinobt(&((mp)->m_sb)) ? \ XFS_FIBT_BLOCK(mp) + 1 : \ XFS_IBT_BLOCK(mp) + 1) - - /* * BMAP Btree format definitions * diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index ee3aaa0a..32e24ec 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -246,7 +246,7 @@ xfs_growfs_data_private( agf->agf_flfirst = 0; agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1); agf->agf_flcount = 0; - tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); + tmpsize = agsize - mp->m_ag_prealloc_blocks; agf->agf_freeblks = cpu_to_be32(tmpsize); agf->agf_longest = cpu_to_be32(tmpsize); if (xfs_sb_version_hascrc(&mp->m_sb)) @@ -343,7 +343,7 @@ xfs_growfs_data_private( agno, 0); arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); - arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); + arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks); arec->ar_blockcount = cpu_to_be32( agsize - be32_to_cpu(arec->ar_startblock)); @@ -372,7 +372,7 @@ xfs_growfs_data_private( agno, 0); arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); - arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); + arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks); arec->ar_blockcount = cpu_to_be32( agsize - be32_to_cpu(arec->ar_startblock)); nfree += be32_to_cpu(arec->ar_blockcount); diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index bb753b3..3d4a4fb 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -249,6 +249,8 @@ xfs_initialize_perag( if (maxagi) *maxagi = index; + + mp->m_ag_prealloc_blocks = xfs_prealloc_blocks(mp); return 0; out_unwind: diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index b570984..77def45 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -93,6 +93,7 @@ typedef struct xfs_mount { uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ uint m_in_maxlevels; /* max inobt btree levels. */ + xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */ struct radix_tree_root m_perag_tree; /* per-ag accounting info */ spinlock_t m_perag_lock; /* lock for m_perag_tree */ struct mutex m_growlock; /* growfs mutex */ _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs