bcachefs: Workqueues should be WQ_HIGHPRI

Most bcachefs workqueues are used for completions, and should be
WQ_HIGHPRI - this helps reduce queuing delays, we want to complete
quickly once we can no longer signal backpressure by blocking.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/super.c b/fs/bcachefs/super.c
index 2ca89b315ceb141c7c6a0a201157315cf976ed6e..b91efec11dfeefb9be82f904d2d004dcadeaeac6 100644 (file)
--- a/fs/bcachefs/super.c
+++ b/fs/bcachefs/super.c
@@ -862,13 +862,13 @@ static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts)
        c->inode_shard_bits = ilog2(roundup_pow_of_two(num_possible_cpus()));
 
        if (!(c->btree_update_wq = alloc_workqueue("bcachefs",
-                               WQ_FREEZABLE|WQ_UNBOUND|WQ_MEM_RECLAIM, 512)) ||
+                               WQ_HIGHPRI|WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_UNBOUND, 512)) ||
            !(c->btree_io_complete_wq = alloc_workqueue("bcachefs_btree_io",
-                               WQ_FREEZABLE|WQ_MEM_RECLAIM, 1)) ||
+                               WQ_HIGHPRI|WQ_FREEZABLE|WQ_MEM_RECLAIM, 1)) ||
            !(c->copygc_wq = alloc_workqueue("bcachefs_copygc",
-                               WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 1)) ||
+                               WQ_HIGHPRI|WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 1)) ||
            !(c->io_complete_wq = alloc_workqueue("bcachefs_io",
-                               WQ_FREEZABLE|WQ_HIGHPRI|WQ_MEM_RECLAIM, 512)) ||
+                               WQ_HIGHPRI|WQ_FREEZABLE|WQ_MEM_RECLAIM, 512)) ||
            !(c->write_ref_wq = alloc_workqueue("bcachefs_write_ref",
                                WQ_FREEZABLE, 0)) ||
 #ifndef BCH_WRITE_REF_DEBUG