From 748b442800e877a93a4fa1256418d0b66bdc55ce Mon Sep 17 00:00:00 2001 From: Heiner Kallweit Date: Sun, 28 May 2023 19:39:59 +0200 Subject: net: don't set sw irq coalescing defaults in case of PREEMPT_RT If PREEMPT_RT is set, then assume that the user focuses on minimum latency. Therefore don't set sw irq coalescing defaults. This affects the defaults only, users can override these settings via sysfs. Signed-off-by: Heiner Kallweit Link: https://lore.kernel.org/r/f9439c7f-c92c-4c2c-703e-110f96d841b7@gmail.com Signed-off-by: Jakub Kicinski --- net/core/dev.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'net/core') diff --git a/net/core/dev.c b/net/core/dev.c index 3393c2f3dbe8..99d99b247bc9 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -10571,8 +10571,10 @@ void netdev_sw_irq_coalesce_default_on(struct net_device *dev) { WARN_ON(dev->reg_state == NETREG_REGISTERED); - dev->gro_flush_timeout = 20000; - dev->napi_defer_hard_irqs = 1; + if (!IS_ENABLED(CONFIG_PREEMPT_RT)) { + dev->gro_flush_timeout = 20000; + dev->napi_defer_hard_irqs = 1; + } } EXPORT_SYMBOL_GPL(netdev_sw_irq_coalesce_default_on); -- cgit v1.2.3