linux-kernel - Re: [PATCH 5.10 014/167] net: Introduce preferred busy-polling

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Message-ID: <YQGA+Aqh7Twuq3Wk@kroah.com>
Date:   Wed, 28 Jul 2021 18:08:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Pavel Machek <pavel@...x.de>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Björn Töpel <bjorn.topel@...el.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 5.10 014/167] net: Introduce preferred busy-polling

On Wed, Jul 28, 2021 at 09:48:28AM +0200, Pavel Machek wrote:
> Hi!
> 
> > From: Björn Töpel <bjorn.topel@...el.com>
> > 
> > [ Upstream commit 7fd3253a7de6a317a0683f83739479fb880bffc8 ]
> > 
> > The existing busy-polling mode, enabled by the SO_BUSY_POLL socket
> > option or system-wide using the /proc/sys/net/core/busy_read knob, is
> > an opportunistic. That means that if the NAPI context is not
> 
> Do we need this in -stable? It is rather long at 400 lines, and
> introduces new API feature, does not fix a bug.

It was needed for a patch that was dropped, so I dropped this too,
thanks.

greg k-h