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

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Date:   Wed, 28 Jul 2021 09:48:28 +0200
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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

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.

I can revert it on top of 5.10-stable, so I don't believe we have
bugfix depending on it.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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