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Lachlan McIlroy 364f358a73 [XFS] Prevent direct I/O from mapping extents beyond eof ... With the help from some tracing I found that we try to map extents beyond eof when doing a direct I/O read. It appears that the way to inform the generic direct I/O path (ie do_direct_IO()) that we have breached eof is to return an unmapped buffer from xfs_get_blocks_direct(). This will cause do_direct_IO() to jump to the hole handling code where is will check for eof and then abort. This problem was found because a direct I/O read was trying to map beyond eof and was encountering delayed allocations. The delayed allocations beyond eof are speculative allocations and they didn't get converted when the direct I/O flushed the file because there was only enough space in the current AG to convert and write out the dirty pages within eof. Note that xfs_iomap_write_allocate() wont necessarily convert all the delayed allocation passed to it - it will return after allocating the first extent - so if the delayed allocation extends beyond eof then it will stay that way. SGI-PV: 983683 SGI-Modid: xfs-linux-melb:xfs-kern:31929a Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org>		17 years ago
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kmem.c	[XFS] kmem_free and kmem_realloc to use const void *	17 years ago
kmem.h	[XFS] kmem_free and kmem_realloc to use const void *	17 years ago
mrlock.h	[XFS] shrink mrlock_t	17 years ago
mutex.h	…
sv.h	…
time.h	…
xfs_aops.c	[XFS] Prevent direct I/O from mapping extents beyond eof	17 years ago
xfs_aops.h	[XFS] move v_iocount from bhv_vnode to xfs_inode	18 years ago
xfs_buf.c	[XFS] Use KM_NOFS for debug trace buffers	17 years ago
xfs_buf.h	[XFS] replace the XFS buf iodone semaphore with a completion	17 years ago
xfs_cred.h	[XFS] Replace __inline with inline	17 years ago
xfs_dmapi_priv.h	…
xfs_export.c	[XFS] convert xfs to use ERR_CAST	17 years ago
xfs_export.h	xfs: new export ops	18 years ago
xfs_file.c	[PATCH] fix ->llseek() for a bunch of directories	17 years ago
xfs_fs_subr.c	[XFS] Avoid directly referencing the VFS inode.	17 years ago
xfs_fs_subr.h	[XFS] decontaminate vnode operations from behavior details	18 years ago
xfs_globals.c	[XFS] Fix up sparse warnings.	17 years ago
xfs_globals.h	[XFS] Remove xfs_physmem	18 years ago
xfs_ioctl.c	[XFS] Kill shouty XFS_ITOV() macro	17 years ago
xfs_ioctl32.c	[XFS] Fix up sparse warnings.	17 years ago
xfs_ioctl32.h	…
xfs_iops.c	[PATCH] change d_add_ci argument ordering	17 years ago
xfs_iops.h	[XFS] stop using file_update_time	17 years ago
xfs_linux.h	CRED: Introduce credential access wrappers	17 years ago
xfs_lrw.c	[XFS] stop using file_update_time	17 years ago
xfs_lrw.h	[XFS] remove sendfile leftovers	17 years ago
xfs_stats.c	[XFS] streamline init/exit path	17 years ago
xfs_stats.h	[XFS] fix compilation without CONFIG_PROC_FS	17 years ago
xfs_super.c	[XFS] Fix regression introduced by remount fixup	17 years ago
xfs_super.h	[XFS] sanitize xfs_initialize_vnode	17 years ago
xfs_sysctl.c	[XFS] streamline init/exit path	17 years ago
xfs_sysctl.h	[XFS] streamline init/exit path	17 years ago
xfs_version.h	…
xfs_vfs.h	[XFS] Remove periodic logging of in-core superblock counters.	17 years ago
xfs_vnode.c	[XFS] clean up stale references to semaphores	17 years ago
xfs_vnode.h	[XFS] kill bhv_vnode_t	17 years ago
xfs_xattr.c	[XFS] Remove vn_revalidate calls in xfs.	17 years ago