#armlinux on 2021-10-01 — irc logs at libera.irclog.whitequark.org

2021-05-27 16:22 ChanServ changed the topic of #armlinux to: ARM kernel talk [Upstream kernel, find your vendor forums for questions about their kernels] | https://libera.irclog.whitequark.org/armlinux

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11:09 <ajb-linaro> does anyone know if the Pi4 is a BCM2838 or a BCM2711?

11:10 <j`ey_> ajb-linaro: 2711 https://www.raspberrypi.org/documentation/computers/processors.html#bcm2711

11:11 <ajb-linaro> j`ey_: thanks - I was confused by the backward step in model number

11:11 <j`ey_> it's counting down, BCM0 will be the perfect SoC!

11:13 <ajb-linaro> I'm sure this won't make the QEMU code confusing

11:13 <ajb-linaro> .name = TYPE_BCM2711,

11:13 <ajb-linaro> .class_init = bcm2711_class_init,

11:13 <ajb-linaro> .parent = TYPE_BCM283X,

11:15 * ajb-linaro hopes the board revision layout hasn't changed

11:18 <ajb-linaro> j`ey_: I don't suppose your knowledge extends to where www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/ went?

11:19 <j`ey_> nope sorry

11:19 * ajb-linaro is dumb - they are at the bottom of the redirect: https://www.raspberrypi.org/documentation/computers/raspberry-pi.html#raspberry-pi-revision-codes

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19:31 <m4t> i've been encountering this weird issue on both 4.14-rt and 4.19-rt on kirkwood where at what appears to be the SECOND jiffies over flow (or orion_event hitting 2^31 / CONFIG_HZ), system entropy estimates take an immediate nosedive. the estimated entropy goes to near 0 almost instantly after something like haveged adds it

19:32 <m4t> it happens consistently after almost precisely 2^31 / 1000 seconds uptime... https://paste.ee/p/kwWcn is ftrace showing random:* vs /proc/uptime vs entropy_avail

19:32 <m4t> nothing in userland is debiting entropy

19:33 <m4t> btw, it's in that state now, if anyone has ideas of what i could check w/ftrace

19:34 <m4t> https://imgur.com/a/Sv4FWno are some older munin graphs showing the same

19:40 <m4t> s/orion_event hitting 2^31 / CONFIG_HZ/orion_event hitting 2^31/

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