Xin Zhong 914ee295af Btrfs: pwrite blocked when writing from the mmaped buffer of the same page ... This problem is found in meego testing: http://bugs.meego.com/show_bug.cgi?id=6672 A file in btrfs is mmaped and the mmaped buffer is passed to pwrite to write to the same page of the same file. In btrfs_file_aio_write(), the pages is locked by prepare_pages(). So when btrfs_copy_from_user() is called, page fault happens and the same page needs to be locked again in filemap_fault(). The fix is to move iov_iter_fault_in_readable() before prepage_pages() to make page fault happen before pages are locked. And also disable page fault in critical region in btrfs_copy_from_user(). Reviewed-by: Yan, Zheng<zheng.z.yan@intel.com> Signed-off-by: Zhong, Xin <xin.zhong@intel.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>		2010-12-10 16:29:10 -05:00
..
Kconfig	Revert "task_struct: make journal_info conditional"	2009-12-17 13:23:24 -08:00
Makefile	Btrfs: Mixed back reference (FORWARD ROLLING FORMAT CHANGE)	2009-06-10 11:29:46 -04:00
acl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable	2010-06-11 14:18:47 -07:00
async-thread.c	Btrfs: don't walk around with task->state != TASK_RUNNING	2010-05-25 10:34:58 -04:00
async-thread.h	Btrfs: fix deadlock on async thread startup	2009-10-05 09:44:45 -04:00
btrfs_inode.h	Btrfs: Metadata reservation for orphan inodes	2010-05-25 10:34:52 -04:00
compat.h	Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code	2009-01-06 09:38:55 -05:00
compression.c	btrfs: cleanup duplicate bio allocating functions	2010-11-21 22:26:03 -05:00
compression.h	Btrfs: Add zlib compression support	2008-10-29 14:49:59 -04:00
ctree.c	Btrfs: cleanup warnings from gcc 4.6 (nonbugs)	2010-10-29 15:14:37 -04:00
ctree.h	btrfs: make 1-bit signed fileds unsigned	2010-11-21 22:26:07 -05:00
delayed-ref.c	Btrfs: Integrate metadata reservation with start_transaction	2010-05-25 10:34:50 -04:00
delayed-ref.h	Btrfs: Integrate metadata reservation with start_transaction	2010-05-25 10:34:50 -04:00
dir-item.c	Btrfs: Fix variables set but not read (bugs found by gcc 4.6)	2010-10-29 15:14:31 -04:00
disk-io.c	Btrfs: don't use migrate page without CONFIG_MIGRATION	2010-11-29 09:49:11 -05:00
disk-io.h	Btrfs: use async helpers for DIO write checksumming	2010-05-25 10:34:58 -04:00
export.c	Btrfs: handle NFS lookups properly	2010-11-21 22:26:08 -05:00
export.h	NFS support for btrfs - v3	2008-09-25 11:04:06 -04:00
extent-tree.c	Btrfs: do not BUG if we fail to remove the orphan item for dead snapshots	2010-12-10 16:29:04 -05:00
extent_io.c	Btrfs: fix fiemap	2010-11-27 13:37:50 -05:00
extent_io.h	btrfs: cleanup duplicate bio allocating functions	2010-11-21 22:26:03 -05:00
extent_map.c	Btrfs: Use ERR_CAST helpers	2010-10-29 15:14:23 -04:00
extent_map.h	Btrfs: search for an allocation hint while filling file COW	2009-09-18 16:08:52 -04:00
file-item.c	Btrfs: add basic DIO read/write support	2010-05-25 10:34:57 -04:00
file.c	Btrfs: pwrite blocked when writing from the mmaped buffer of the same page	2010-12-10 16:29:10 -05:00
free-space-cache.c	Btrfs: deal with space cache errors better	2010-12-09 13:57:12 -05:00
free-space-cache.h	Btrfs: load free space cache if it exists	2010-10-29 09:26:35 -04:00
hash.h	Btrfs: remove crc32c.h and use libcrc32c directly.	2009-06-10 11:29:53 -04:00
inode-item.c	Btrfs: Integrate metadata reservation with start_transaction	2010-05-25 10:34:50 -04:00
inode-map.c	Btrfs: do not reuse objectid of deleted snapshot/subvol	2009-09-21 15:56:00 -04:00
inode.c	Btrfs: Fix page leak in compressed writeback path	2010-12-10 16:29:09 -05:00
ioctl.c	Btrfs: fix sync subvol/snapshot creation	2010-12-10 16:29:10 -05:00
ioctl.h	Btrfs: add SNAP_CREATE_ASYNC ioctl	2010-10-29 21:41:57 -04:00
locking.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
locking.h	Btrfs: fix spinlock assertions on UP systems	2009-03-09 11:45:38 -04:00
ordered-data.c	Btrfs: deal with DIO bios that span more than one ordered extent	2010-11-28 19:56:33 -05:00
ordered-data.h	Btrfs: deal with DIO bios that span more than one ordered extent	2010-11-28 19:56:33 -05:00
orphan.c	Btrfs: fixup return code for btrfs_del_orphan_item	2010-12-09 13:57:15 -05:00
print-tree.c	Btrfs: remove of redundant btrfs_header_level	2009-07-22 16:52:13 -04:00
print-tree.h	Btrfs: Create extent_buffer interface for large blocksizes	2008-09-25 11:03:56 -04:00
ref-cache.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
ref-cache.h	Btrfs: use RB_ROOT to intialize rb_trees instead of setting rb_node to NULL	2010-03-08 16:26:50 -05:00
relocation.c	Btrfs: Fix variables set but not read (bugs found by gcc 4.6)	2010-10-29 15:14:31 -04:00
root-tree.c	Btrfs: cleanup warnings from gcc 4.6 (nonbugs)	2010-10-29 15:14:37 -04:00
struct-funcs.c	Btrfs: Fix checkpatch.pl warnings	2009-01-05 21:25:51 -05:00
super.c	Btrfs: Fix a crash when mounting a subvolume	2010-12-10 16:29:10 -05:00
sysfs.c	Driver core: Constify struct sysfs_ops in struct kobj_type	2010-03-07 17:04:49 -08:00
transaction.c	Btrfs: use dget_parent where we can UPDATED	2010-11-21 22:26:09 -05:00
transaction.h	Btrfs: add START_SYNC, WAIT_SYNC ioctls	2010-10-29 15:41:32 -04:00
tree-defrag.c	Btrfs: cleanup warnings from gcc 4.6 (nonbugs)	2010-10-29 15:14:37 -04:00
tree-log.c	Btrfs: use dget_parent where we can UPDATED	2010-11-21 22:26:09 -05:00
tree-log.h	Btrfs: Metadata ENOSPC handling for tree log	2010-05-25 10:34:53 -04:00
version.h	Update Btrfs files for in-kernel usage	2008-09-25 15:41:59 -04:00
version.sh	Btrfs: Fixes for 2.6.28-rc API changes	2008-11-19 21:17:22 -05:00
volumes.c	Btrfs: cleanup warnings from gcc 4.6 (nonbugs)	2010-10-29 15:14:37 -04:00
volumes.h	Btrfs: make balance code choose more wisely when relocating	2009-09-21 19:23:48 -04:00
xattr.c	Btrfs: cleanup warnings from gcc 4.6 (nonbugs)	2010-10-29 15:14:37 -04:00
xattr.h	btrfs: constify xattr_handler	2010-05-21 18:31:18 -04:00
zlib.c	Btrfs: cleanup warnings from gcc 4.6 (nonbugs)	2010-10-29 15:14:37 -04:00