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| author | Jonathan Corbet <corbet@lwn.net> | 2016-12-27 22:53:44 +0300 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2016-12-27 22:53:44 +0300 |
| commit | 54ab6db0909061ab7ee07233d3cab86d29f86e6c (patch) | |
| tree | a7650ab5c0fa3a6a3841de8e8693041b3e009054 /fs/btrfs/async-thread.c | |
| parent | 217e2bfab22e740227df09f22165e834cddd8a3b (diff) | |
| parent | 7ce7d89f48834cefece7804d38fc5d85382edf77 (diff) | |
| download | linux-54ab6db0909061ab7ee07233d3cab86d29f86e6c.tar.xz | |
Merge tag 'v4.10-rc1' into docs-next
Linux 4.10-rc1
Diffstat (limited to 'fs/btrfs/async-thread.c')
| -rw-r--r-- | fs/btrfs/async-thread.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c index e0f071f6b5a7..63d197724519 100644 --- a/fs/btrfs/async-thread.c +++ b/fs/btrfs/async-thread.c @@ -86,6 +86,20 @@ btrfs_work_owner(struct btrfs_work *work) return work->wq->fs_info; } +bool btrfs_workqueue_normal_congested(struct btrfs_workqueue *wq) +{ + /* + * We could compare wq->normal->pending with num_online_cpus() + * to support "thresh == NO_THRESHOLD" case, but it requires + * moving up atomic_inc/dec in thresh_queue/exec_hook. Let's + * postpone it until someone needs the support of that case. + */ + if (wq->normal->thresh == NO_THRESHOLD) + return false; + + return atomic_read(&wq->normal->pending) > wq->normal->thresh * 2; +} + BTRFS_WORK_HELPER(worker_helper); BTRFS_WORK_HELPER(delalloc_helper); BTRFS_WORK_HELPER(flush_delalloc_helper); |