David Sterba e0ae999414 btrfs: preallocate device flush bio ... For devices that support flushing, we allocate a bio, submit, wait for it and then free it. The bio allocation does not fail so ENOMEM is not a problem but we still may unnecessarily stress the allocation subsystem. Instead, we can allocate the bio at the same time we allocate the device and reuse it each time we need to flush the barriers. The bio is reset before each use. Reference counting is simplified to just device allocation (get) and freeing (put). The bio used to be submitted through the integrity checker which will find out that bio has no data attached and call submit_bio. Status of the bio in flight needs to be tracked separately in case the device caches get switched off between write and wait. Signed-off-by: David Sterba <dsterba@suse.com>		2017-06-21 19:03:38 +02:00
..
tests	Btrfs: replace tree->mapping with tree->private_data	2017-06-19 18:25:58 +02:00
acl.c
async-thread.c
async-thread.h
backref.c	btrfs: use GFP_KERNEL in init_ipath	2017-06-19 18:26:02 +02:00
backref.h
btrfs_inode.h	Btrfs: fix reported number of inode blocks	2017-04-26 16:27:26 +01:00
check-integrity.c	btrfs: sink gfp parameter to btrfs_io_bio_alloc	2017-06-19 18:26:04 +02:00
check-integrity.h
compression.c	btrfs: pass bytes to btrfs_bio_alloc	2017-06-19 18:26:03 +02:00
compression.h	btrfs: reduce arguments for decompress_bio ops	2017-06-19 18:26:00 +02:00
ctree.c	btrfs: adjust includes after vmalloc removal	2017-06-19 18:26:02 +02:00
ctree.h	btrfs: Round down values which are written for total_bytes_size	2017-06-20 14:22:48 +02:00
dedupe.h
delayed-inode.c	btrfs: convert btrfs_delayed_item.refs from atomic_t to refcount_t	2017-04-18 14:07:23 +02:00
delayed-inode.h	btrfs: convert btrfs_delayed_item.refs from atomic_t to refcount_t	2017-04-18 14:07:23 +02:00
delayed-ref.c	btrfs: convert btrfs_delayed_ref_node.refs from atomic_t to refcount_t	2017-04-18 14:07:23 +02:00
delayed-ref.h	btrfs: convert btrfs_delayed_ref_node.refs from atomic_t to refcount_t	2017-04-18 14:07:23 +02:00
dev-replace.c	Btrfs: switch to div64_u64 if with a u64 divisor	2017-04-18 14:07:26 +02:00
dev-replace.h	btrfs: constify device path passed to relevant helpers	2017-02-28 14:26:07 +01:00
dir-item.c	btrfs: tree-log.c: Wrong printk information about namelen	2017-06-09 12:48:07 -07:00
disk-io.c	btrfs: preallocate device flush bio	2017-06-21 19:03:38 +02:00
disk-io.h	btrfs: btrfs_wait_tree_block_writeback can be void return	2017-06-19 18:26:01 +02:00
export.c
export.h
extent_io.c	btrfs: sink gfp parameter to btrfs_io_bio_alloc	2017-06-19 18:26:04 +02:00
extent_io.h	btrfs: sink gfp parameter to btrfs_io_bio_alloc	2017-06-19 18:26:04 +02:00
extent_map.c	btrfs: convert extent_map.refs from atomic_t to refcount_t	2017-04-18 14:07:23 +02:00
extent_map.h	btrfs: convert extent_map.refs from atomic_t to refcount_t	2017-04-18 14:07:23 +02:00
extent-tree.c	btrfs: Use btrfs_space_info_used instead of opencoding it	2017-06-19 18:26:04 +02:00
file-item.c	Btrfs: change how we iterate bios in endio	2017-06-19 18:25:59 +02:00
file.c	Btrfs: fix invalid extent maps due to hole punching	2017-06-21 16:52:45 +02:00
free-space-cache.c	btrfs: use clear_page where appropriate	2017-04-18 14:07:26 +02:00
free-space-cache.h
free-space-tree.c	Btrfs: use memalloc_nofs and kvzalloc() for free space tree bitmaps	2017-06-19 18:26:01 +02:00
free-space-tree.h
hash.c	crypto: Work around deallocated stack frame reference gcc bug on sparc.	2017-06-08 17:36:03 +08:00
hash.h
inode-item.c
inode-map.c	btrfs: all btrfs_delalloc_release_metadata take btrfs_inode	2017-02-28 11:30:07 +01:00
inode-map.h
inode.c	btrfs: cleanup duplicate return value in insert_inline_extent	2017-06-20 14:22:12 +02:00
ioctl.c	btrfs: use GFP_KERNEL in init_ipath	2017-06-19 18:26:02 +02:00
Kconfig
locking.c
locking.h
lzo.c	btrfs: switch to kvmalloc and GFP_KERNEL in lzo/zlib alloc_workspace	2017-06-19 18:26:02 +02:00
Makefile
math.h
ordered-data.c	btrfs: convert btrfs_ordered_extent.refs from atomic_t to refcount_t	2017-04-18 14:07:23 +02:00
ordered-data.h	btrfs: convert btrfs_ordered_extent.refs from atomic_t to refcount_t	2017-04-18 14:07:23 +02:00
orphan.c
print-tree.c	Btrfs: let btrfs_print_leaf print more about block group	2017-06-19 18:26:00 +02:00
print-tree.h
props.c
props.h
qgroup.c	btrfs: add cond_resched to btrfs_qgroup_trace_leaf_items	2017-06-21 15:48:01 +02:00
qgroup.h	btrfs: qgroup: Re-arrange tracepoint timing to co-operate with reserved space tracepoint	2017-04-18 14:07:26 +02:00
raid56.c	btrfs: sink gfp parameter to btrfs_io_bio_alloc	2017-06-19 18:26:04 +02:00
raid56.h
rcu-string.h
reada.c	btrfs: remove unused member err from reada_extent	2017-06-19 18:25:59 +02:00
relocation.c	Btrfs: replace tree->mapping with tree->private_data	2017-06-19 18:25:58 +02:00
root-tree.c	btrfs: Use ktime_get_real_ts for root ctime	2017-04-18 14:07:27 +02:00
scrub.c	btrfs: sink gfp parameter to btrfs_io_bio_alloc	2017-06-19 18:26:04 +02:00
send.c	Btrfs: incremental send, fix invalid path for unlink commands	2017-06-21 16:53:10 +02:00
send.h
struct-funcs.c
super.c	btrfs: obsolete and remove mount option alloc_start	2017-06-20 14:22:48 +02:00
sysfs.c	btrfs: Add quota_override knob into sysfs	2017-06-19 18:25:58 +02:00
sysfs.h
transaction.c	btrfs: move fs_info::fs_frozen to the flags	2017-06-20 14:22:42 +02:00
transaction.h	btrfs: remove unused qgroup members from btrfs_trans_handle	2017-04-18 14:07:25 +02:00
tree-defrag.c
tree-log.c	btrfs: convert extent_map.refs from atomic_t to refcount_t	2017-04-18 14:07:23 +02:00
tree-log.h
ulist.c
ulist.h
uuid-tree.c
volumes.c	btrfs: preallocate device flush bio	2017-06-21 19:03:38 +02:00
volumes.h	btrfs: preallocate device flush bio	2017-06-21 19:03:38 +02:00
xattr.c
xattr.h
zlib.c	btrfs: switch to kvmalloc and GFP_KERNEL in lzo/zlib alloc_workspace	2017-06-19 18:26:02 +02:00