From 1baaed8fa955ab0d23aab24477dae566ed6a105b Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Thu, 27 Jun 2013 16:04:50 +1000 Subject: [PATCH] xfs: xfs_ifree doesn't need to modify the inode buffer Long ago, bulkstat used to read inodes directly from the backing buffer for speed. This had the unfortunate problem of being cache incoherent with unlinks, and so xfs_ifree() had to mark the inode as free directly in the backing buffer. bulkstat was changed some time ago to use inode cache coherent lookups, and so will never see unlinked inodes in it's lookups. Hence xfs_ifree() does not need to touch the inode backing buffer anymore. Signed-off-by: Dave Chinner Reviewed-by: Mark Tinguely Signed-off-by: Ben Myers --- fs/xfs/xfs_inode.c | 32 ++++---------------------------- 1 file changed, 4 insertions(+), 28 deletions(-) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index d1f76da6f8bf..9ecfe1e559fc 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -2048,8 +2048,6 @@ xfs_ifree( int error; int delete; xfs_ino_t first_ino; - xfs_dinode_t *dip; - xfs_buf_t *ibp; ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(ip->i_d.di_nlink == 0); @@ -2062,14 +2060,13 @@ xfs_ifree( * Pull the on-disk inode from the AGI unlinked list. */ error = xfs_iunlink_remove(tp, ip); - if (error != 0) { + if (error) return error; - } error = xfs_difree(tp, ip->i_ino, flist, &delete, &first_ino); - if (error != 0) { + if (error) return error; - } + ip->i_d.di_mode = 0; /* mark incore inode as free */ ip->i_d.di_flags = 0; ip->i_d.di_dmevmask = 0; @@ -2081,31 +2078,10 @@ xfs_ifree( * by reincarnations of this inode. */ ip->i_d.di_gen++; - xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); - error = xfs_imap_to_bp(ip->i_mount, tp, &ip->i_imap, &dip, &ibp, - 0, 0); - if (error) - return error; - - /* - * Clear the on-disk di_mode. This is to prevent xfs_bulkstat - * from picking up this inode when it is reclaimed (its incore state - * initialzed but not flushed to disk yet). The in-core di_mode is - * already cleared and a corresponding transaction logged. - * The hack here just synchronizes the in-core to on-disk - * di_mode value in advance before the actual inode sync to disk. - * This is OK because the inode is already unlinked and would never - * change its di_mode again for this inode generation. - * This is a temporary hack that would require a proper fix - * in the future. - */ - dip->di_mode = 0; - - if (delete) { + if (delete) error = xfs_ifree_cluster(ip, tp, first_ino); - } return error; } -- 2.20.1