- 22 1月, 2009 4 次提交
-
-
由 Chris Mason 提交于
Just before reading a leaf, btrfs scans the node for blocks that are close by and reads them too. It tries to build up a large window of IO looking for blocks that are within a max distance from the top and bottom of the IO window. This patch changes things to just look for blocks within 64k of the target block. It will trigger less IO and make for lower latencies on the read size. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Yehuda Sadeh 提交于
Now that bmap support is gone, this is the only way to get extent mappings for userland. These are still not valid for IO, but they can tell us if a file has holes or how much fragmentation there is. Signed-off-by: NYehuda Sadeh <yehuda@hq.newdream.net>
-
由 Chris Mason 提交于
Swapfiles use bmap to build a list of extents belonging to the file, and they assume these extents won't change over the life of the file. They also use resulting list to do IO directly to the block device. This causes problems for btrfs in a few ways: btrfs returns logical block numbers through bmap, and these are not suitable for IO. They might translate to different devices, raid etc. COW means that file block mappings are going to change frequently. Using swapfiles on btrfs will lead to corruption, so we're avoiding the problem for now by dropping bmap support entirely. A later commit will add fiemap support for people that really want to know how a file is laid out. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Yan Zheng 提交于
To improve performance, btrfs_sync_log merges tree log sync requests. But it wrongly merges sync requests for different tree logs. If multiple tree logs are synced at the same time, only one of them actually gets synced. This patch has following changes to fix the bug: Move most tree log related fields in btrfs_fs_info to btrfs_root. This allows merging sync requests separately for each tree log. Don't insert root item into the log root tree immediately after log tree is allocated. Root item for log tree is inserted when log tree get synced for the first time. This allows syncing the log root tree without first syncing all log trees. At tree-log sync, btrfs_sync_log first sync the log tree; then updates corresponding root item in the log root tree; sync the log root tree; then update the super block. Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
-
- 21 1月, 2009 13 次提交
-
-
由 Qinghuang Feng 提交于
a bug in open_ctree: struct btrfs_root *open_ctree(..) { .... if (!extent_root || !tree_root || !fs_info || !chunk_root || !dev_root || !csum_root) { err = -ENOMEM; goto fail; //When code flow goes to "fail", fs_info may be NULL or uninitialized. } .... fail: btrfs_close_devices(fs_info->fs_devices);// ! btrfs_mapping_tree_free(&fs_info->mapping_tree);// ! kfree(extent_root); kfree(tree_root); bdi_destroy(&fs_info->bdi);// ! ... ) Signed-off-by: NQinghuang Feng <qhfeng.kernel@gmail.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Yan Zheng 提交于
replace_one_extent searches tree leaves for references to a given extent. It stops searching if it goes beyond the last possible position. The last possible position is computed by adding the starting offset of a found file extent to the full size of the extent. The code uses physical size of the extent as the full size. This is incorrect when compression is used. The fix is get the full size from ram_bytes field of file extent item. Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
-
由 Jan Engelhardt 提交于
Change one typedef to a regular enum, and remove an unused one. Signed-off-by: NJan Engelhardt <jengelh@medozas.de> Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Huang Weiyi 提交于
Removed duplicated #include "compat.h"in fs/btrfs/extent-tree.c Signed-off-by: NHuang Weiyi <weiyi.huang@gmail.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Yan Zheng 提交于
btrfs_extent_post_op calls finish_current_insert and del_pending_extents. They both may enter infinite loops. finish_current_insert enters infinite loop if it only finds some backrefs to update. The fix is to check for pending backref updates before restarting the loop. The infinite loop in del_pending_extents is due to a the skipped variable not being properly reset before looping around. Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
-
由 Yan Zheng 提交于
We should hold the block_group_cache_lock while modifying the block groups red-black tree. Thank you, Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
-
由 Qinghuang Feng 提交于
Merge list_for_each* and list_entry to list_for_each_entry* Signed-off-by: NQinghuang Feng <qhfeng.kernel@gmail.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Qinghuang Feng 提交于
kthread_run() returns the kthread or ERR_PTR(-ENOMEM), not NULL. Signed-off-by: NQinghuang Feng <qhfeng.kernel@gmail.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Roland Dreier 提交于
The "devid <xxx> transid <xxx>" printk in btrfs_scan_one_device() actually follows another printk that doesn't end in a newline (since the intention is for the two printks to make one line of output), so the KERN_INFO just ends up messing up the output: device label exp <6>devid 1 transid 9 /dev/sda5 Fix this by changing the extra KERN_INFO to KERN_CONT. Signed-off-by: NRoland Dreier <rolandd@cisco.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Huang Weiyi 提交于
Removed unused #include <version.h>'s in btrfs Signed-off-by: NHuang Weiyi <weiyi.huang@gmail.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Josef Bacik 提交于
Andrew's review of the xattr code revealed some minor issues that this patch addresses. Just an error return fix, got rid of a useless statement and commented one of the trickier parts of __btrfs_getxattr. Signed-off-by: NJosef Bacik <jbacik@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Joe Perches 提交于
Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Wang Cong 提交于
- Remove the unused local variable 'len'; - Check return value of kmalloc(). Signed-off-by: NWang Cong <wangcong@zeuux.org> Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
- 17 1月, 2009 2 次提交
-
-
由 Chris Mason 提交于
The structure used to send device in btrfs ioctl calls was not properly aligned, and so 32 bit ioctls would not work properly on 64 bit kernels. We could fix this with compat ioctls, but we're just one byte away and it doesn't make sense at this stage to carry about the compat ioctls forever at this stage in the project. This patch brings the ioctl arg up to an evenly aligned 4k. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Chris Mason 提交于
Btrfs maintains a queue of async bio submissions so the checksumming threads don't have to wait on get_request_wait. In order to avoid extra wakeups, this code has a running_pending flag that is used to tell new submissions they don't need to wake the thread. When the threads notice congestion on a single device, they may decide to requeue the job and move on to other devices. This makes sure the running_pending flag is cleared before the job is requeued. It should help avoid IO stalls by making sure the task is woken up when new submissions come in. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
- 10 1月, 2009 1 次提交
-
-
由 Chris Mason 提交于
Each subvolume has an extent_state_tree used to mark metadata that needs to be sent to disk while syncing the tree. This is used in addition to the dirty bits on the pages themselves so that a single subvolume can be sent to disk efficiently in disk order. Normally this marking happens in btrfs_alloc_free_block, which also does special recording of dirty tree blocks for the tree log roots. Yan Zheng noticed that when the root of the log tree is allocated, it is added to the wrong writeback list. The fix used here is to explicitly set it dirty as part of tree log creation. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
- 08 1月, 2009 1 次提交
-
-
由 Chris Mason 提交于
This is already in the arch specific directories in mainline and shouldn't be copied into btrfs. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
- 07 1月, 2009 4 次提交
-
-
由 David Woodhouse 提交于
Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Chris Mason 提交于
None of the checksum verification code schedules, so we can use the faster kmap_atomic Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Chris Mason 提交于
Checksum verification happens in a helper thread, and there is no need to mess with interrupts. This switches to kmap() instead. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Yan Zheng 提交于
This patch contains following things. 1) Limit the max size of btrfs_ordered_sum structure to PAGE_SIZE. This struct is kmalloced so we want to keep it reasonable. 2) Replace copy_extent_csums by btrfs_lookup_csums_range. This was duplicated code in tree-log.c 3) Remove replay_one_csum. csum items are replayed at the same time as replaying file extents. This guarantees we only replay useful csums. 4) nbytes accounting fix. Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
-
- 06 1月, 2009 15 次提交
-
-
由 Yan Zheng 提交于
btrfs_drop_extents doesn't change file extent's ram_bytes in the case of booked extent. To be consistent, we should also not change ram_bytes when truncating existing extent. Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
-
由 Yan Zheng 提交于
Snapshot creation happens at a specific time during transaction commit. We need to make sure the code called by snapshot creation doesn't wait for the running transaction to commit. This changes btrfs_delete_inode and finish_pending_snaps to use btrfs_join_transaction instead of btrfs_start_transaction to avoid deadlocks. It would be better if btrfs_delete_inode didn't use the join, but the call path that triggers it is: btrfs_commit_transaction->create_pending_snapshots-> create_pending_snapshot->btrfs_lookup_dentry-> fixup_tree_root_location->btrfs_read_fs_root-> btrfs_read_fs_root_no_name->btrfs_orphan_cleanup->iput This will be fixed in a later patch by moving the orphan cleanup to the cleaner thread. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Chris Mason 提交于
Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Chris Mason 提交于
They should stay out until this is turned into generic code. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Chris Mason 提交于
There were many, most are fixed now. struct-funcs.c generates some warnings but these are bogus. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Liu Hui 提交于
This is a patch to fix discard semantic to make Btrfs work with FTL and SSD. We can improve FTL's performance by telling it which sectors are freed by file system. But if we don't tell FTL the information of free sectors in proper time, the transaction mechanism of Btrfs will be destroyed and Btrfs could not roll back the previous transaction under the power loss condition. There are some problems in the old implementation: 1, In __free_extent(), the pinned down extents should not be discarded. 2, In free_extents(), the free extents are all pinned, so they need to be discarded in transaction committing time instead of free_extents(). 3, The reserved extent used by log tree should be discard too. This patch change discard behavior as follows: 1, For the extents which need to be free at once, we discard them in update_block_group(). 2, Delay discarding the pinned extent in btrfs_finish_extent_commit() when committing transaction. 3, Remove discarding from free_extents() and __free_extent() 4, Add discard interface into btrfs_free_reserved_extent() 5, Discard sectors before updating the free space cache, otherwise, FTL will destroy file system data.
-
由 Yan Zheng 提交于
drop_one_dir_item does not properly update inode's link count. It can be reproduced by executing following commands: #touch test #sync #rm -f test #dd if=/dev/zero bs=4k count=1 of=test conv=fsync #echo b > /proc/sysrq-trigger This fixes it by adding an BTRFS_ORPHAN_ITEM_KEY for the inode Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
-
由 Yan Zheng 提交于
The data in fs_info->super_for_commit are zeros before the first transaction commit. If tree log sync and system crash both occur before the first transaction commit, super block will get corrupted. This fixes it by properly filling in the super_for_commit field at open time. Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
-
由 Shen Feng 提交于
Signed-off-by: NShen Feng <shen@cn.fujitsu.com>
-
由 Shen Feng 提交于
subvol_name should be freed if error occurs. Signed-off-by: NShen Feng <shen@cn.fujitsu.com>
-
由 Liu Hui 提交于
In clear_state_cb, we should check 'tree->ops->clear_bit_hook' instead of 'tree->ops->set_bit_hook'. Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 yanhai zhu 提交于
Signed-off-by: NChris Mason <chris.mason@oracle.com>
-
由 Yan Zheng 提交于
Make sure directory's size properly updated when creating subvol/snapshot. Signed-off-by: NYan Zheng <zheng.yan@oracle.com>
-
由 Chris Mason 提交于
Only root can add/remove devices Only root can defrag subtrees Only files open for writing can be defragged Only files open for writing can be the destination for a clone Signed-off-by: NChris Mason <chris.mason@oracle.com>
-