Re: kernel configs in Debian

2021-04-26 Thread Ryutaroh Matsumoto
Hi Arnd, > Also, do you see the same performance difference with the non-rt kernel? > Most people would not run the -rt kernel because of the inherent > performance overhead, and it's not clear whether the slowdown you > see is the result of a combination of CONFIG_PREEMPT_RT with some > other opt

Re: Raspi 4 debian image update-initramfs

2021-04-26 Thread Vorak David Hoeung
Hello Diederik, Yes it works with initramfs-tools version 0.140 from bullseye on USB. I have tested : https://raspi.debian.net/verified/20210210_raspi_4_buster.img.xz It boots on USB. But after upgrade, kernel updated, it cannot boot any more. https://raspi.debian.net/daily/raspi_4_buster.img.x

Re: kernel configs in Debian

2021-04-26 Thread Arnd Bergmann
On Mon, Apr 26, 2021 at 9:43 AM Ryutaroh Matsumoto wrote: > > For (ARM) SBCs with limited computational power, stripping out > unused features from the kernel sometimes improves the performance, > depending on usage. > > For my use case of packet filtering by RPi4B, > > CONFIG_PARAVIRT=n > CONFIG_

kernel configs in Debian

2021-04-26 Thread Ryutaroh Matsumoto
Hi, For (ARM) SBCs with limited computational power, stripping out unused features from the kernel sometimes improves the performance, depending on usage. For my use case of packet filtering by RPi4B, CONFIG_PARAVIRT=n CONFIG_DEBUG_KERNEL=n each of the above increases the throughput of the pack