https://github.com/torvalds/linux
Revision fd340d0f68cc87badfc9efcb226f23a5428826a0 authored by Josef Bacik on 11 January 2019, 15:21:02 UTC, committed by David Sterba on 18 January 2019, 16:27:23 UTC
The cleaner thread usually takes care of delayed iputs, with the exception of the btrfs_end_transaction_throttle path. Delaying iputs means we are potentially delaying the eviction of an inode and it's respective space. The cleaner thread only gets woken up every 30 seconds, or when we require space. If there are a lot of inodes that need to be deleted we could induce a serious amount of latency while we wait for these inodes to be evicted. So instead wakeup the cleaner if it's not already awake to process any new delayed iputs we add to the list. If we suddenly need space we will less likely be backed up behind a bunch of inodes that are waiting to be deleted, and we could possibly free space before we need to get into the flushing logic which will save us some latency. Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: David Sterba <dsterba@suse.com>
1 parent 3ec9a4c
Tip revision: fd340d0f68cc87badfc9efcb226f23a5428826a0 authored by Josef Bacik on 11 January 2019, 15:21:02 UTC
btrfs: wakeup cleaner thread when adding delayed iput
btrfs: wakeup cleaner thread when adding delayed iput
Tip revision: fd340d0
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| .clang-format | -rw-r--r-- | 12.7 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.5 KB |
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| COPYING | -rw-r--r-- | 423 bytes |
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| MAINTAINERS | -rw-r--r-- | 473.2 KB |
| Makefile | -rw-r--r-- | 59.7 KB |
| README | -rw-r--r-- | 727 bytes |
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