From 9fa8046f50bcb88ab9183ee1f22de5adc42bf92a Mon Sep 17 00:00:00 2001 From: Yingping Lu Date: Wed, 22 Mar 2006 12:44:35 +1100 Subject: [XFS] Fixing the error caused by the conflict between DIO Write's conversion and concurrent truncate operations. Use vn_iowait to wait for the completion of any pending DIOs. Since the truncate requires exclusive IOLOCK, so this blocks any further DIO operations since DIO write also needs exclusive IOBLOCK. This serves as a barrier and prevent any potential starvation. SGI-PV: 947420 SGI-Modid: xfs-linux-melb:xfs-kern:208088a Signed-off-by: Yingping Lu Signed-off-by: Nathan Scott --- fs/xfs/xfs_inode.c | 3 +++ fs/xfs/xfs_vnodeops.c | 5 ++++- 2 files changed, 7 insertions(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 2424a4777949..8d2b36879f06 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -1420,6 +1420,9 @@ xfs_itruncate_start( mp = ip->i_mount; vp = XFS_ITOV(ip); + + vn_iowait(vp); /* wait for the completion of any pending DIOs */ + /* * Call VOP_TOSS_PAGES() or VOP_FLUSHINVAL_PAGES() to get rid of pages and buffers * overlapping the region being removed. We have to use diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 8b5a44fe2865..697bf22a84f3 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -615,6 +615,7 @@ xfs_setattr( code = xfs_igrow_start(ip, vap->va_size, credp); } xfs_iunlock(ip, XFS_ILOCK_EXCL); + vn_iowait(vp); /* wait for the completion of any pending DIOs */ if (!code) code = xfs_itruncate_data(ip, vap->va_size); if (code) { @@ -4310,8 +4311,10 @@ xfs_free_file_space( ASSERT(attr_flags & ATTR_NOLOCK ? attr_flags & ATTR_DMI : 1); if (attr_flags & ATTR_NOLOCK) need_iolock = 0; - if (need_iolock) + if (need_iolock) { xfs_ilock(ip, XFS_IOLOCK_EXCL); + vn_iowait(vp); /* wait for the completion of any pending DIOs */ + } rounding = MAX((__uint8_t)(1 << mp->m_sb.sb_blocklog), (__uint8_t)NBPP); -- cgit v1.2.2