Uso il Raspberry Pi durante la notte per eseguire il backup dati di alcuni siti sparsi su internet facendone il download dei dati.
Mi è capitati diverse volte che il Rasp-Pi vada in freeze e non risponda via rete. I log che trovo in /var/log/kern.log sono questi:
Apr 28 16:29:39 raspberrypi kernel: [85223.191749] net_ratelimit: 3722 callbacks suppressed
Apr 28 16:29:39 raspberrypi kernel: [85223.191790] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped
Apr 28 16:29:39 raspberrypi kernel: [85223.191882] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped
Apr 28 16:29:39 raspberrypi kernel: [85223.191961] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped
Apr 28 16:29:39 raspberrypi kernel: [85223.192025] smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped
Googolando ho trovato questa possibile soluzione su http://www.raspberrypi.org/phpBB3/viewtopic.php?p=134136:
I performed the following suggested modifications mentioned in this thread.
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Updated the firmware according to this blog post: http://www.stuffaboutcode.com/2012/07/raspberry-pi-kernal-panic-solved-by.html i.e. (add “sudo” before each command if you’re not logged in as root)
apt-get install git-core
wget http://goo.gl/1BOfJ -O /usr/bin/rpi-update && chmod +x /usr/bin/rpi-update
apt-get install ca-certificates
rpi-update
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Increased “vm.min_free_kbytes” to 16384 in /etc/sysctl.conf:
nano /etc/sysctl.conf
Replace the number 8192 after “vm.min_free_kbytes =” with 16384, i.e. double it.
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Added “smsc95xx.turbo_mode=N” to /boot/cmdline.txt:
nano /boot/cmdline.txt
Paste “smsc95xx.turbo_mode=N” after all other entries in the file.
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After that I pulled the plug, let the RPi rest for a few seconds before plugging it in again. Done!