From: Andrew Lunn <andrew@lunn.ch>
To: Grant Edwards <grant.b.edwards@gmail.com>
Cc: netdev@vger.kernel.org
Subject: Re: net: macb: fail when there's no PHY
Date: Thu, 3 Dec 2020 22:49:41 +0100 [thread overview]
Message-ID: <20201203214941.GA2409950@lunn.ch> (raw)
In-Reply-To: <rqbluj$l72$1@ciao.gmane.io>
> I don't think there's any way I could justify using a kernel that
> doesn't have long-term support.
5.10 is LTS. Well, it will be, once it is actually released!
Andrew
> [It looks like we're going to have to abandon the effort to use
> 5.4. The performance is so bad compared to 2.6.33.7 that our product
> just plain won't work. We've already had remove features to the get
> 5.4 kernel down to a usable size, but we were prepared to live with
> that.]
Ah. Small caches? The OpenWRT guys make valid complaints that the code
hot path of the network stack is getting too big to fit in the cache
of small systems. So there is a lot of cache misses and performance is
not good. If i remember correctly, just having netfilter in the build
is bad, even if it is not used.
Andrew
next prev parent reply other threads:[~2020-12-03 21:50 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-21 19:59 net: macb: fail when there's no PHY Grant Edwards
2017-09-21 20:05 ` Florian Fainelli
2017-09-21 20:36 ` Grant Edwards
2017-09-21 21:35 ` Brandon Streiff
2017-09-29 7:05 ` Harini Katakam
[not found] ` <CAK=1mW6Gti0QpUjirB6PfMCiQvnDjkbb56pVKkQmpCSkRU6wtA@mail.gmail.com>
2020-12-02 18:10 ` Florian Fainelli
2020-12-02 18:24 ` Grant Edwards
2020-12-02 18:35 ` Andrew Lunn
2020-12-02 19:16 ` Grant Edwards
2020-12-02 21:11 ` Andrew Lunn
2020-12-02 21:23 ` Grant Edwards
2020-12-03 2:39 ` Andrew Lunn
2020-12-03 3:03 ` Grant Edwards
2020-12-03 3:42 ` Florian Fainelli
2020-12-03 3:54 ` Grant Edwards
2020-12-03 4:07 ` Andrew Lunn
2020-12-03 15:07 ` Grant Edwards
2020-12-03 21:17 ` Andrew Lunn
2020-12-03 21:39 ` Grant Edwards
2020-12-03 21:49 ` Andrew Lunn [this message]
2020-12-03 22:20 ` Grant Edwards
2020-12-04 8:28 ` Alexander Dahl
2020-12-04 8:28 ` Alexander Dahl
2020-12-04 8:28 ` Alexander Dahl
2020-12-04 13:42 ` Grant Edwards
2020-12-04 17:36 ` Andrew Lunn
2020-12-04 17:36 ` Andrew Lunn
2020-12-04 17:36 ` Andrew Lunn
2020-12-04 16:47 ` Florian Fainelli
2020-12-05 2:52 ` Grant Edwards
2020-12-05 3:06 ` Florian Fainelli
2020-12-03 4:00 ` Andrew Lunn
2020-12-02 18:10 ` Grant Edwards
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