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| author | Chris Mason <chris.mason@oracle.com> | 2008-08-04 08:20:15 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:06 -0400 |
| commit | 2dd3e67b1eaec8504da7e12b8afee77323a49f38 (patch) | |
| tree | 794035de0243b20cda0fdf571e2ed02f29aa962e /fs/btrfs/transaction.c | |
| parent | 65b51a009e29e64c0951f21ea17fdc66bbb0fbd7 (diff) | |
| download | blackbird-op-linux-2dd3e67b1eaec8504da7e12b8afee77323a49f38.tar.gz blackbird-op-linux-2dd3e67b1eaec8504da7e12b8afee77323a49f38.zip | |
Btrfs: More throttle tuning
* Make walk_down_tree wake up throttled tasks more often
* Make walk_down_tree call cond_resched during long loops
* As the size of the ref cache grows, wait longer in throttle
* Get rid of the reada code in walk_down_tree, the leaves don't get
read anymore, thanks to the ref cache.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/transaction.c')
| -rw-r--r-- | fs/btrfs/transaction.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 9d84daf10008..cf73342e8215 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -210,7 +210,9 @@ static noinline int wait_for_commit(struct btrfs_root *root, static void throttle_on_drops(struct btrfs_root *root) { struct btrfs_fs_info *info = root->fs_info; + int harder_count = 0; +harder: if (atomic_read(&info->throttles)) { DEFINE_WAIT(wait); int thr; @@ -226,6 +228,19 @@ static void throttle_on_drops(struct btrfs_root *root) schedule(); finish_wait(&info->transaction_throttle, &wait); } while (thr == atomic_read(&info->throttle_gen)); + harder_count++; + + if (root->fs_info->total_ref_cache_size > 1 * 1024 * 1024 && + harder_count < 2) + goto harder; + + if (root->fs_info->total_ref_cache_size > 5 * 1024 * 1024 && + harder_count < 10) + goto harder; + + if (root->fs_info->total_ref_cache_size > 10 * 1024 * 1024 && + harder_count < 20) + goto harder; } } |
