From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 1 Aug 2019 11:13:51 +0000 (+0200)
Subject: crypto: engine - Reduce default RT priority
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d13dfae3cedd60072d448b7e382c86143a29cedc;p=openwrt%2Fstaging%2Fblogic.git

crypto: engine - Reduce default RT priority

The crypto engine initializes its kworker thread to FIFO-99 (when
requesting RT priority), reduce this to FIFO-50.

FIFO-99 is the very highest priority available to SCHED_FIFO and
it not a suitable default; it would indicate the crypto work is the
most important work on the machine.

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/crypto/crypto_engine.c b/crypto/crypto_engine.c
index d7502ec37f20..055d17977280 100644
--- a/crypto/crypto_engine.c
+++ b/crypto/crypto_engine.c
@@ -425,7 +425,7 @@ EXPORT_SYMBOL_GPL(crypto_engine_stop);
  */
 struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
 {
-	struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
+	struct sched_param param = { .sched_priority = MAX_RT_PRIO / 2 };
 	struct crypto_engine *engine;
 
 	if (!dev)