From: Darrick J. Wong <djwong@xxxxxxxxxx> Switch ext4 to use a per-sb fsverity workqueue instead of a systemwide workqueue. Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> --- fs/ext4/super.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 044135796f2b6..d54c74c222999 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5332,6 +5332,17 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) #endif #ifdef CONFIG_FS_VERITY sb->s_vop = &ext4_verityops; + /* + * Use a high-priority workqueue to prioritize verification work, which + * blocks reads from completing, over regular application tasks. + * + * For performance reasons, don't use an unbound workqueue. Using an + * unbound workqueue for crypto operations causes excessive scheduler + * latency on ARM64. + */ + err = fsverity_init_wq(sb, WQ_HIGHPRI, num_online_cpus()); + if (err) + goto failed_mount3a; #endif #ifdef CONFIG_QUOTA sb->dq_op = &ext4_quota_operations;
