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android_kernel_motorola_sm6225/fs/xfs
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Dave Chinner ad22c7a043 xfs: prevent stack overflows from page cache allocation 
Page cache allocation doesn't always go through ->begin_write and
hence we don't always get the opportunity to set the allocation
context to GFP_NOFS. Failing to do this means we open up the direct
relcaim stack to recurse into the filesystem and consume a
significant amount of stack.

On RHEL6.4 kernels we are seeing ra_submit() and
generic_file_splice_read() from an nfsd context recursing into the
filesystem via the inode cache shrinker and evicting inodes. This is
causing truncation to be run (e.g EOF block freeing) and causing
bmap btree block merges and free space btree block splits to occur.
These btree manipulations are occurring with the call chain already
30 functions deep and hence there is not enough stack space to
complete such operations.

To avoid these specific overruns, we need to prevent the page cache
allocation from recursing via direct reclaim. We can do that because
the allocation functions take the allocation context from that which
is stored in the mapping for the inode. We don't set that right now,
so the default is GFP_HIGHUSER_MOVABLE, which is effectively a
GFP_KERNEL context. We need it to be the equivalent of GFP_NOFS, so
when we initialise an inode, set the mapping gfp mask appropriately.

This makes the use of AOP_FLAG_NOFS redundant from other parts of
the XFS IO path, so get rid of it.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
2013-10-30 15:44:51 -05:00
..
Kconfig xfs: introduce CONFIG_XFS_WARN 2013-05-07 18:45:36 -05:00
kmem.c xfs: factor all the kmalloc-or-vmalloc fallback allocations 2013-09-10 13:57:03 -05:00
kmem.h xfs: factor all the kmalloc-or-vmalloc fallback allocations 2013-09-10 13:57:03 -05:00
Makefile xfs: abstract the differences in dir2/dir3 via an ops vector 2013-10-30 13:37:38 -05:00
mrlock.h xfs: introduce CONFIG_XFS_WARN 2013-05-07 18:45:36 -05:00
time.h xfs: remove subdirectories 2011-08-12 16:21:35 -05:00
uuid.c xfs: remove subdirectories 2011-08-12 16:21:35 -05:00
uuid.h xfs: add CRC infrastructure 2012-11-19 20:11:24 -06:00
xfs.h xfs: introduce CONFIG_XFS_WARN 2013-05-07 18:45:36 -05:00
xfs_acl.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_acl.h xfs: increase number of ACL entries for V5 superblocks 2013-06-06 10:52:15 -05:00
xfs_ag.h xfs: create a shared header file for format-related information 2013-10-23 14:11:30 -05:00
xfs_alloc.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_alloc.h xfs: create a shared header file for format-related information 2013-10-23 14:11:30 -05:00
xfs_alloc_btree.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_alloc_btree.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_aops.c xfs: prevent stack overflows from page cache allocation 2013-10-30 15:44:51 -05:00
xfs_aops.h direct-io: Implement generic deferred AIO completions 2013-09-04 09:23:46 -04:00
xfs_attr.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_attr.h xfs: kill xfs_vnodeops.[ch] 2013-08-12 16:53:39 -05:00
xfs_attr_inactive.c xfs: vectorise encoding/decoding directory headers 2013-10-30 13:47:22 -05:00
xfs_attr_leaf.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_attr_leaf.h xfs: unify directory/attribute format definitions 2013-10-23 14:21:40 -05:00
xfs_attr_list.c xfs: vectorise encoding/decoding directory headers 2013-10-30 13:47:22 -05:00
xfs_attr_remote.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_attr_remote.h xfs: unify directory/attribute format definitions 2013-10-23 14:21:40 -05:00
xfs_attr_sf.h
xfs_bit.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_bit.h
xfs_bmap.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_bmap.h xfs: remove __KERNEL__ from debug code 2013-08-12 16:58:37 -05:00
xfs_bmap_btree.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_bmap_btree.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_bmap_util.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_bmap_util.h xfs: fold xfs_change_file_space into xfs_ioc_space 2013-10-21 16:57:03 -05:00
xfs_btree.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_btree.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_buf.c xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_buf.h xfs: rework buffer dispose list tracking 2013-09-10 18:56:31 -04:00
xfs_buf_item.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_buf_item.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_cksum.h xfs: add CRC infrastructure 2012-11-19 20:11:24 -06:00
xfs_da_btree.c xfs: convert directory vector functions to constants 2013-10-30 13:49:18 -05:00
xfs_da_btree.h xfs: abstract the differences in dir2/dir3 via an ops vector 2013-10-30 13:37:38 -05:00
xfs_da_format.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_da_format.h xfs: convert directory vector functions to constants 2013-10-30 13:48:41 -05:00
xfs_dinode.h xfs: di_flushiter considered harmful 2013-07-25 10:41:42 -05:00
xfs_dir2.c xfs: convert directory vector functions to constants 2013-10-30 13:49:18 -05:00
xfs_dir2.h xfs: convert directory vector functions to constants 2013-10-30 13:49:18 -05:00
xfs_dir2_block.c xfs: convert directory vector functions to constants 2013-10-30 13:49:18 -05:00
xfs_dir2_data.c xfs: validity check the directory block leaf entry count 2013-10-30 13:57:14 -05:00
xfs_dir2_leaf.c xfs: convert directory vector functions to constants 2013-10-30 13:49:18 -05:00
xfs_dir2_node.c xfs: convert directory vector functions to constants 2013-10-30 13:49:18 -05:00
xfs_dir2_priv.h xfs: vectorise encoding/decoding directory headers 2013-10-30 13:47:22 -05:00
xfs_dir2_readdir.c xfs: convert directory vector functions to constants 2013-10-30 13:49:18 -05:00
xfs_dir2_sf.c xfs: convert directory vector functions to constants 2013-10-30 13:49:18 -05:00
xfs_discard.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_discard.h xfs: remove subdirectories 2011-08-12 16:21:35 -05:00
xfs_dquot.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_dquot.h xfs: create a shared header file for format-related information 2013-10-23 14:11:30 -05:00
xfs_dquot_buf.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_dquot_item.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_dquot_item.h xfs: remove subdirectories 2011-08-12 16:21:35 -05:00
xfs_error.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_error.h
xfs_export.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_export.h xfs: remove subdirectories 2011-08-12 16:21:35 -05:00
xfs_extent_busy.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_extent_busy.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_extfree_item.c xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_extfree_item.h xfs: split out EFI/EFD log item format definition 2013-08-12 16:07:13 -05:00
xfs_file.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_filestream.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_filestream.h xfs: xfs_filestreams.h doesn't need __KERNEL__ 2013-08-12 17:00:11 -05:00
xfs_format.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_fs.h xfs: add the inode directory type support to XFS_IOC_FSGEOM 2013-10-08 14:28:09 -05:00
xfs_fsops.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_fsops.h
xfs_globals.c xfs: add background scanning to clear eofblocks inodes 2012-11-08 15:34:59 -06:00
xfs_ialloc.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_ialloc.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_ialloc_btree.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_ialloc_btree.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_icache.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_icache.h xfs: update #2 for v3.12-rc1 2013-09-12 16:13:41 -07:00
xfs_icreate_item.c xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_icreate_item.h xfs: separate icreate log format definitions from xfs_icreate_item.h 2013-08-12 16:10:35 -05:00
xfs_inode.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_inode.h xfs: abstract the differences in dir2/dir3 via an ops vector 2013-10-30 13:37:38 -05:00
xfs_inode_buf.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_inode_buf.h xfs: create a shared header file for format-related information 2013-10-23 14:11:30 -05:00
xfs_inode_fork.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_inode_fork.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_inode_item.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_inode_item.h xfs: split out inode log item format definition 2013-08-12 16:05:19 -05:00
xfs_inum.h xfs: move xfsagino_t to xfs_types.h 2012-05-14 16:20:54 -05:00
xfs_ioctl.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_ioctl.h xfs: consolidate extent swap code 2013-08-12 16:56:06 -05:00
xfs_ioctl32.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_ioctl32.h xfs: remove subdirectories 2011-08-12 16:21:35 -05:00
xfs_iomap.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_iomap.h xfs: get rid of count from xfs_iomap_write_allocate() 2013-10-01 15:42:34 -05:00
xfs_iops.c xfs: prevent stack overflows from page cache allocation 2013-10-30 15:44:51 -05:00
xfs_iops.h xfs: fold xfs_change_file_space into xfs_ioc_space 2013-10-21 16:57:03 -05:00
xfs_itable.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_itable.h
xfs_linux.h xfs: remove two unused macro definitions in xfs_linux.h 2013-08-20 15:30:23 -05:00
xfs_log.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_log.h xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_log_cil.c xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_log_format.h xfs: create a shared header file for format-related information 2013-10-23 14:11:30 -05:00
xfs_log_priv.h xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_log_recover.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_log_recover.h
xfs_log_rlimit.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_message.c xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_message.h xfs: introduce CONFIG_XFS_WARN 2013-05-07 18:45:36 -05:00
xfs_mount.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_mount.h xfs: vectorise DA btree operations 2013-10-30 13:43:28 -05:00
xfs_mru_cache.c
xfs_mru_cache.h
xfs_qm.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_qm.h xfs: split dquot buffer operations out 2013-10-23 14:28:35 -05:00
xfs_qm_bhv.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_qm_syscalls.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_quota.h xfs: split dquot buffer operations out 2013-10-23 14:28:35 -05:00
xfs_quota_defs.h xfs: split dquot buffer operations out 2013-10-23 14:28:35 -05:00
xfs_quota_priv.h xfs: use per-filesystem radix trees for dquot lookup 2012-03-14 11:09:06 -05:00
xfs_quotaops.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_rtalloc.c xfs: split xfs_rtalloc.c for userspace sanity 2013-10-23 17:16:32 -05:00
xfs_rtalloc.h xfs: split xfs_rtalloc.c for userspace sanity 2013-10-23 17:16:32 -05:00
xfs_rtbitmap.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_sb.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_sb.h xfs: create a shared header file for format-related information 2013-10-23 14:11:30 -05:00
xfs_shared.h xfs: create a shared header file for format-related information 2013-10-23 14:11:30 -05:00
xfs_stats.c xfs: use common code for quota statistics 2012-03-14 11:09:06 -05:00
xfs_stats.h xfs: use common code for quota statistics 2012-03-14 11:09:06 -05:00
xfs_super.c xfs: fix static and extern sparse warnings 2013-10-30 13:59:56 -05:00
xfs_super.h xfs: xfs_sync_data is redundant. 2012-10-17 12:01:25 -05:00
xfs_symlink.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_symlink.h xfs: push down inactive transaction mgmt for remote symlinks 2013-10-08 14:53:02 -05:00
xfs_symlink_remote.c xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_sysctl.c xfs: Convert use of typedef ctl_table to struct ctl_table 2013-06-17 17:42:25 -05:00
xfs_sysctl.h xfs: add background scanning to clear eofblocks inodes 2012-11-08 15:34:59 -06:00
xfs_trace.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_trace.h xfs: update for 3.11-rc1 2013-07-09 12:29:12 -07:00
xfs_trans.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_trans.h xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_trans_ail.c xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_trans_buf.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_trans_dquot.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_trans_extfree.c xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_trans_inode.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_trans_priv.h xfs: decouple log and transaction headers 2013-10-23 16:17:44 -05:00
xfs_trans_resv.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00
xfs_trans_resv.h xfs: Get rid of all XFS_XXX_LOG_RES() macro 2013-08-12 17:48:08 -05:00
xfs_trans_space.h
xfs_types.h xfs: Add read-only support for dirent filetype field 2013-08-22 08:40:24 -05:00
xfs_vnode.h xfs: clean up xfs_inactive() error handling, kill VN_INACTIVE_[NO]CACHE 2013-10-08 17:20:41 -05:00
xfs_xattr.c xfs: decouple inode and bmap btree header files 2013-10-23 16:28:49 -05:00