netdev - Re: [PATCH] net: revert default NAPI poll timeout to 2 jiffies

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Message-Id: <20200407.183142.390281754035873578.davem@davemloft.net>
Date:   Tue, 07 Apr 2020 18:31:42 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     khlebnikov@...dex-team.ru
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kuba@...nel.org, zeil@...dex-team.ru, tedheadster@...il.com
Subject: Re: [PATCH] net: revert default NAPI poll timeout to 2 jiffies

From: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Date: Mon, 06 Apr 2020 14:39:32 +0300

> For HZ < 1000 timeout 2000us rounds up to 1 jiffy but expires randomly
> because next timer interrupt could come shortly after starting softirq.
> 
> For commonly used CONFIG_HZ=1000 nothing changes.
> 
> Fixes: 7acf8a1e8a28 ("Replace 2 jiffies with sysctl netdev_budget_usecs to enable softirq tuning")
> Reported-by: Dmitry Yakunin <zeil@...dex-team.ru>
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>

Applied, thank you.