From: Heiner Kallweit Date: Sun, 28 May 2023 17:39:59 +0000 (+0200) Subject: net: don't set sw irq coalescing defaults in case of PREEMPT_RT X-Git-Tag: v6.5-rc1~163^2~194 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=748b442800e877a93a4fa1256418d0b66bdc55ce;p=thirdparty%2Flinux.git 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 --- diff --git a/net/core/dev.c b/net/core/dev.c index 3393c2f3dbe88..99d99b247bc97 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);