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Open Source and information security mailing list archives
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Date: Thu, 3 Dec 2020 22:49:41 +0100 From: Andrew Lunn <andrew@...n.ch> To: Grant Edwards <grant.b.edwards@...il.com> Cc: netdev@...r.kernel.org Subject: Re: net: macb: fail when there's no PHY > 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
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