修改内核路径

hc

2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b

 kernel/fs/verity/verify.c
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..
@@ -279,15 +279,15 @@
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 int __init fsverity_init_workqueue(void)
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 {
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 	/*
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-	 * Use an unbound workqueue to allow bios to be verified in parallel
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-	 * even when they happen to complete on the same CPU.  This sacrifices
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-	 * locality, but it's worthwhile since hashing is CPU-intensive.
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+	 * Use a high-priority workqueue to prioritize verification work, which
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+	 * blocks reads from completing, over regular application tasks.
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 	 *
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-	 * Also use a high-priority workqueue to prioritize verification work,
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-	 * which blocks reads from completing, over regular application tasks.
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+	 * For performance reasons, don't use an unbound workqueue.  Using an
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+	 * unbound workqueue for crypto operations causes excessive scheduler
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+	 * latency on ARM64.
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 	 */
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 	fsverity_read_workqueue = alloc_workqueue("fsverity_read_queue",
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-						  WQ_UNBOUND | WQ_HIGHPRI,
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+						  WQ_HIGHPRI,
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 						  num_online_cpus());
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 	if (!fsverity_read_workqueue)
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 		return -ENOMEM;