Kernel panic with high network(wifi) speeds + usb storage

[pepedog]

OK, I installed transmission-cli, and had the 3 Pi downloads going.
Everything fine for a while, 150+ clients connected, no panic but log as lots of these
Jun 9 14:42:55 alarmpi kernel: smsc95xx 1-1.1:1.0: eth0: kevent 2 may have been dropped
Added these to sysctl.conf as per kernel messages
net.core.rmem_max = 4194304
net.core.wmem_max = 1048576
It's the same, search google for
$this->bbcode_second_pass_code('', 'site:raspberrypi.org "may have been dropped"')

[guisacouto]

Did you used an external hd or usb pen drive?

I think if I download directly do sd card the problem doesn't happen, so it's a bit different.

edit: how about total download speed? how many KB/s were you getting?
did does changes in sysctl.conf solved the problem?

I checked now the /var/log/everythong (didn't remember to look at that earlier), and saw those indications of transmission. Changed the sysctl.conf to add those but still got the panic

[pepedog]

Think this fixes it, no unwanted messages in logs
$this->bbcode_second_pass_code('', 'My /boot/cmdline.txt check your rootfstype and root
smsc95xx.turbo_mode=N console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 loglevel=2 root=/dev/sda1 rootfstype=ext3 rootwait')
Then reboot
Can you verify it fixes, please?

[guisacouto]

My cmdline.txt was
$this->bbcode_second_pass_code('', '
smsc95xx.turbo_mode=N dwc_otg.dma_enable=1 dwc_otg.dma_burst_size=256 dwc_otg.lpm_enable=0 dwc_otg.dma_enable=1 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 loglevel=2 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait
')

I adapted your to mey rootfs and now is
$this->bbcode_second_pass_code('', '
smsc95xx.turbo_mode=N console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 loglevel=2 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait
')

Testing now, and will report as soon as possible:)

[pepedog]

It was a USB hard drive, btw
My dl speed was maxed out at ISP delivery of 2MB/s

[guisacouto]

It did work for a lot more time.. but it still got a kernel panic..

edit:
Dont know if this is relevant, but I saw this in everythong.log

$this->bbcode_second_pass_code('', ' Jun 9 18:16:47 berry kernel: usb 1-1.3: reset high speed USB device number 5 using dwc_otg')

[pepedog]

Well, I will redownload again, I have fs as ext3 and vm.min_free_kbytes=32768 in /etc/sysctl.conf

[guisacouto]

Tks for your help:)

My vm.min_free_kbyte is also at 32768.

[pepedog]

I trashed and download all 3 at the same time in 10 minutes.
Can you format an reinstall easily? I think it's generally admitted there are still problems in the kernel. Don't know why mine is ok, only the cmdline setting changed

[guisacouto]

I think my rpi can take 10 mins period, but it crashes around ~15/20 (it depends).

If you try to download something bigger that can take a few hours, that would probably fail too.

Yeah, sure I can format if you think it might help.. and I can always backup my sd card with dd.

edit:

just tested it now. Got a panic after 28 minutes of downloading torrents with transmission. The speed indicated by the web interface was 279kb/s (it was actually slow..).
The cpu load pointed by htop is 50.9%, and using 52MB of RAM.