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a6d7636e8d
linux/fs/xfs
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Dave Chinner a6d7636e8d xfs: fix recursive splice read locking with DAX 
Doing a splice read (generic/249) generates a lockdep splat because
we recursively lock the inode iolock in this path:

SyS_sendfile64
do_sendfile
do_splice_direct
splice_direct_to_actor
do_splice_to
xfs_file_splice_read			<<<<<< lock here
default_file_splice_read
vfs_readv
do_readv_writev
do_iter_readv_writev
xfs_file_read_iter			<<<<<< then here

The issue here is that for DAX inodes we need to avoid the page
cache path and hence simply push it into the normal read path.
Unfortunately, we can't tell down at xfs_file_read_iter() whether we
are being called from the splice path and hence we cannot avoid the
locking at this layer. Hence we simply have to drop the inode
locking at the higher splice layer for DAX.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
2016-01-04 16:28:25 +11:00
..
libxfs Merge branch 'xfs-dax-updates' into for-next 2015-11-03 13:28:41 +11:00
Kconfig
kmem.c xfs: more info from kmem deadlocks and high-level error msgs 2015-10-12 16:04:45 +11:00
kmem.h xfs: change kmem_free to use generic kvfree() 2015-02-02 09:54:18 +11:00
Makefile xfs: stats are no longer dependent on CONFIG_PROC_FS 2015-10-19 08:42:46 +11:00
mrlock.h
uuid.c
uuid.h
xfs_acl.c xfs: Fix error path in xfs_get_acl 2015-11-10 10:09:45 +11:00
xfs_acl.h xfs: Fix error path in xfs_get_acl 2015-11-10 10:09:45 +11:00
xfs_aops.c Merge branch 'xfs-dax-updates' into for-next 2015-11-03 13:28:41 +11:00
xfs_aops.h xfs: DAX does not use IO completion callbacks 2015-11-03 12:37:02 +11:00
xfs_attr_inactive.c Merge branch 'xfs-misc-fixes-for-4.2-3' into for-next 2015-06-23 08:49:01 +10:00
xfs_attr_list.c xfs: per-filesystem stats counter implementation 2015-10-12 18:21:22 +11:00
xfs_attr.h
xfs_bmap_util.c Merge branch 'xfs-dax-updates' into for-next 2015-11-03 13:28:41 +11:00
xfs_bmap_util.h xfs: Add support FALLOC_FL_INSERT_RANGE for fallocate 2015-03-25 15:08:56 +11:00
xfs_buf_item.c Merge branch 'xfs-misc-fixes-for-4.3-3' into for-next 2015-08-25 10:13:35 +10:00
xfs_buf_item.h xfs: fix non-debug build warnings 2015-08-25 10:05:13 +10:00
xfs_buf.c Merge branch 'xfs-misc-fixes-for-4.4-1' into for-next 2015-10-12 18:38:25 +11:00
xfs_buf.h dax: move DAX-related functions to a new header 2015-09-08 15:35:28 -07:00
xfs_dir2_readdir.c xfs: per-filesystem stats counter implementation 2015-10-12 18:21:22 +11:00
xfs_discard.c xfs: pass mp to XFS_WANT_CORRUPTED_GOTO 2015-02-23 22:39:08 +11:00
xfs_discard.h
xfs_dquot_item.c xfs: move most of xfs_sb.h to xfs_format.h 2014-11-28 14:27:09 +11:00
xfs_dquot_item.h
xfs_dquot.c xfs: per-filesystem stats counter implementation 2015-10-12 18:21:22 +11:00
xfs_dquot.h xfs: fix implicit bool to int conversion 2015-01-09 10:48:58 +11:00
xfs_error.c xfs: remove inst_t 2015-06-22 09:44:02 +10:00
xfs_error.h xfs: remove inst_t 2015-06-22 09:44:02 +10:00
xfs_export.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
xfs_export.h
xfs_extent_busy.c xfs: merge xfs_ag.h into xfs_format.h 2014-11-28 14:25:04 +11:00
xfs_extent_busy.h
xfs_extfree_item.c xfs: add helper to conditionally remove items from the AIL 2015-08-19 10:01:08 +10:00
xfs_extfree_item.h xfs: fix efi/efd error handling to avoid fs shutdown hangs 2015-08-19 09:51:16 +10:00
xfs_file.c xfs: fix recursive splice read locking with DAX 2016-01-04 16:28:25 +11:00
xfs_filestream.c xfs: clean up XFS_MIN_FREELIST macros 2015-06-22 10:13:30 +10:00
xfs_filestream.h
xfs_fsops.c xfs: growfs not aware of sb_meta_uuid 2015-08-19 10:31:41 +10:00
xfs_fsops.h
xfs_globals.c
xfs_icache.c xfs: per-filesystem stats counter implementation 2015-10-12 18:21:22 +11:00
xfs_icache.h xfs: merge xfs_ag.h into xfs_format.h 2014-11-28 14:25:04 +11:00
xfs_icreate_item.c xfs: move most of xfs_sb.h to xfs_format.h 2014-11-28 14:27:09 +11:00
xfs_icreate_item.h
xfs_inode_item.c xfs: optimise away log forces on timestamp updates for fdatasync 2015-11-03 13:14:59 +11:00
xfs_inode_item.h xfs: optimise away log forces on timestamp updates for fdatasync 2015-11-03 13:14:59 +11:00
xfs_inode.c Merge branch 'xfs-misc-fixes-for-4.4-2' into for-next 2015-11-03 13:27:58 +11:00
xfs_inode.h xfs: clean up inode lockdep annotations 2015-08-19 10:32:49 +10:00
xfs_ioctl32.c xfs: prefix XATTR_LIST_MAX with XFS_ 2015-10-12 16:02:56 +11:00
xfs_ioctl32.h
xfs_ioctl.c Merge branch 'xfs-misc-fixes-for-4.4-2' into for-next 2015-11-03 13:27:58 +11:00
xfs_ioctl.h
xfs_iomap.c xfs: Don't use reserved blocks for data blocks with DAX 2016-01-04 16:22:45 +11:00
xfs_iomap.h xfs: pass a 64-bit count argument to xfs_iomap_write_unwritten 2015-01-09 10:48:12 +11:00
xfs_iops.c xfs: per-filesystem stats counter implementation 2015-10-12 18:21:22 +11:00
xfs_iops.h xfs: inodes are new until the dentry cache is set up 2015-02-23 22:38:08 +11:00
xfs_itable.c xfs: fix btree cursor error cleanups 2015-08-19 10:00:53 +10:00
xfs_itable.h xfs: bulkstat chunk formatting cursor is broken 2014-11-07 08:30:30 +11:00
xfs_linux.h xfs: pass xfsstats structures to handlers and macros 2015-10-12 05:19:45 +11:00
xfs_log_cil.c xfs: close xc_cil list_empty() races with cil commit sequence 2015-07-29 11:51:01 +10:00
xfs_log_priv.h xfs: validate metadata LSNs against log on v5 superblocks 2015-10-12 15:59:25 +11:00
xfs_log_recover.c Merge branch 'xfs-misc-fixes-for-4.4-3' into for-next 2015-11-10 10:20:48 +11:00
xfs_log.c Merge branch 'xfs-logging-fixes' into for-next 2015-10-12 18:37:58 +11:00
xfs_log.h xfs: validate metadata LSNs against log on v5 superblocks 2015-10-12 15:59:25 +11:00
xfs_message.c xfs: more info from kmem deadlocks and high-level error msgs 2015-10-12 16:04:45 +11:00
xfs_message.h
xfs_mount.c Merge branch 'xfs-misc-fixes-for-4.4-2' into for-next 2015-11-03 13:27:58 +11:00
xfs_mount.h Merge branch 'xfs-dax-updates' into for-next 2015-11-03 13:28:41 +11:00
xfs_mru_cache.c xfs: xfs_mru_cache_insert() should use GFP_NOFS 2015-03-25 14:57:53 +11:00
xfs_mru_cache.h
xfs_pnfs.c xfs: add missing ilock around dio write last extent alignment 2015-10-12 15:34:20 +11:00
xfs_pnfs.h xfs: unlock i_mutex in xfs_break_layouts 2015-04-13 11:38:29 +10:00
xfs_qm_bhv.c xfs: move most of xfs_sb.h to xfs_format.h 2014-11-28 14:27:09 +11:00
xfs_qm_syscalls.c xfs: saner xfs_trans_commit interface 2015-06-04 13:48:08 +10:00
xfs_qm.c xfs: updates for 4.4-rc1 2015-11-11 20:18:48 -08:00
xfs_qm.h xfs: Convert to using ->get_state callback 2015-03-04 16:06:36 +01:00
xfs_quota.h xfs: fix quota block reservation leak when tp allocates and frees blocks 2015-06-01 07:15:37 +10:00
xfs_quotaops.c xfs: Add support for Q_SETINFO 2015-03-04 16:06:38 +01:00
xfs_rtalloc.c xfs: add missing bmap cancel calls in error paths 2015-08-19 10:01:40 +10:00
xfs_rtalloc.h
xfs_stats.c xfs: stats are no longer dependent on CONFIG_PROC_FS 2015-10-19 08:42:46 +11:00
xfs_stats.h xfs: per-filesystem stats counter implementation 2015-10-12 18:21:22 +11:00
xfs_super.c Merge branch 'xfs-misc-fixes-for-4.4-3' into for-next 2015-11-10 10:20:48 +11:00
xfs_super.h xfs: Remove icsb infrastructure 2015-02-23 21:22:31 +11:00
xfs_symlink.c Merge branch 'xfs-misc-fixes-for-4.3-2' into for-next 2015-08-20 09:28:45 +10:00
xfs_symlink.h
xfs_sysctl.c xfs: pass xfsstats structures to handlers and macros 2015-10-12 05:19:45 +11:00
xfs_sysctl.h
xfs_sysfs.c xfs: pass xfsstats structures to handlers and macros 2015-10-12 05:19:45 +11:00
xfs_sysfs.h xfs: create global stats and stats_clear in sysfs 2015-10-12 05:15:45 +11:00
xfs_trace.c xfs: move most of xfs_sb.h to xfs_format.h 2014-11-28 14:27:09 +11:00
xfs_trace.h Merge branch 'xfs-dax-updates' into for-next 2015-11-03 13:28:41 +11:00
xfs_trans_ail.c Merge branch 'xfs-misc-fixes-for-4.4-2' into for-next 2015-11-03 13:27:58 +11:00
xfs_trans_buf.c xfs: only trace buffer items if they exist 2015-02-10 09:23:40 +11:00
xfs_trans_dquot.c xfs: Clean up xfs_trans_dup_dqinfo 2015-06-01 10:50:00 +10:00
xfs_trans_extfree.c xfs: ensure EFD trans aborts on log recovery extent free failure 2015-08-19 09:51:43 +10:00
xfs_trans_inode.c xfs: optimise away log forces on timestamp updates for fdatasync 2015-11-03 13:14:59 +11:00
xfs_trans_priv.h xfs: add helper to conditionally remove items from the AIL 2015-08-19 10:01:08 +10:00
xfs_trans.c xfs: per-filesystem stats counter implementation 2015-10-12 18:21:22 +11:00
xfs_trans.h xfs: ensure EFD trans aborts on log recovery extent free failure 2015-08-19 09:51:43 +10:00
xfs_xattr.c Merge branch 'for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-11-13 18:02:30 -08:00
xfs.h