linux-kernel - Re: Softirq priority inversion from "softirq: reduce latencies"

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Message-Id: <20160227.234657.984787532933890615.davem@davemloft.net>
Date:	Sat, 27 Feb 2016 23:46:57 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	peter@...leysoftware.com
Cc:	eric.dumazet@...il.com, edumazet@...gle.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	gregkh@...uxfoundation.org, dmaengine@...r.kernel.org,
	john.ogness@...utronix.de, bigeasy@...utronix.de,
	akpm@...ux-foundation.org
Subject: Re: Softirq priority inversion from "softirq: reduce latencies"

From: Peter Hurley <peter@...leysoftware.com>
Date: Sat, 27 Feb 2016 18:10:27 -0800

> That tasklet should run before any process.

You never have this guarantee, even before Eric's patch.
Under load tasklets run from ksoftirqd just like any other
softirq.

Please fix your driver and stop blaming Eric's change.

Thank you.