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Running latest development branch on my bpi-r1 my system for the
past few weeks and find that the system is crashing about every 36
hours. It seems that it crashed when its under a little CPU load or
multiple processes are actually doing work. I run e2guargian and
squid on my router. When this crash happens it seems that cpu load
is still low 10 - 20% range. <br>
I just switched to this branch vs the 17.01x series about 2 weeks
ago in an effort to help test the new version before it is
released. At that time the B53 switch drivers were not being
loaded, seems some difference in the 4.9 and 4.14 versions of the
kernel. This patch was created and fixed the switch issue.<br>
<a class="moz-txt-link-freetext" href="https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=b7b14fd64e09b523b2da6a9db6d7ff300964b955">https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=b7b14fd64e09b523b2da6a9db6d7ff300964b955</a><br>
<br>
I use a ralink <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;" id="docs-internal-guid-7cd6da9a-5824-c0dc-1c8a-30c9a40ad3bd">RT chipset 5592 because the onboard 8291cu chip & drivers are junk. The ralink card has worked great for years on the 17.x and prior kernel versions.</span><br>
<br>
crash dump<br>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"
id="docs-internal-guid-7cd6da9a-5821-ed1a-63c3-5d3f1771d4fe"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.124237] Unable to handle kernel NULL pointer deref8</span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.132661] pgd = edc4ad00 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.135502] [00000028] *pgd=6e733003, *pmd=7fc26003 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.140895] Internal error: Oops: 207 [#1] PREEMPT SMP ARM </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.146387] Modules linked in: rt2800usb rt2800lib rt2x00usb rt2x00lib pppoet</span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.217382] ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6t_REJEm</span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.235828] CPU: 0 PID: 4028 Comm: e2guardian Not tainted 4.14.25 #0 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.242172] Hardware name: Allwinner sun7i (A20) Family </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.247391] task: edf71500 task.stack: edf7c000 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.251928] PC is at tcp_push+0x44/0xfc </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.255761] LR is at 0xed34eb34 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.258899] pc : [<c06285d4>] lr : [<ed34eb34>] psr: 40000013 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.265156] sp : edf7de00 ip : ed416780 fp : ed34eb34 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.270373] r10: ed416780 r9 : 0000a9b0 r8 : 00000000 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.275591] r7 : 0000da53 r6 : ed34ea40 r5 : 00000000 r4 : ffffffe0 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.282108] r3 : 00000001 r2 : 000005a8 r1 : 00000000 r0 : ed34ea40 </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.288628] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user</span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.295754] Control: 30c5387d Table: 6dc4ad00 DAC: fffffffd </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.301493] Process e2guardian (pid: 4028, stack limit = 0xedf7c210) </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.307838] Stack: (0xedf7de00 to 0xedf7e000) </span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">[45729.312195] de00: ffffffe0 0000da53 ed34ea40 0000da53 edf7dedc 0000da53 ed414</span></p>
<br>
<br>
Few relevant portions of the kernel boot log<br>
Linux 4.14.27 #0 SMP PREEMPT Wed Mar 21 22:24:09 2018 armv7l GNU/x<br>
<br>
[ 2.307730] usb 1-1: New USB device found, idVendor=148f,
idProduct=5572 <br>
[ 2.314578] usb 1-1: New USB device strings: Mfr=1, Product=2,
SerialNumber=3<br>
[ 2.321805] usb 1-1: Product: 802.11 n
WLAN <br>
[ 2.326064] usb 1-1: Manufacturer:
Ralink <br>
[ 2.330131] usb 1-1: SerialNumber: 1.0 <br>
9.630858] usb 1-1: reset high-speed USB device number 2 using
ehci-platform <br>
[ 9.840191] ieee80211 phy0: rt2x00_set_rt: Info - RT chipset
5592, rev 0222 detected <br>
[ 9.876184] ieee80211 phy0: rt2x00_set_rf: Info - RF chipset 000f
detected <br>
[ 9.884937] ieee80211 phy0: Selected rate control algorithm
'minstrel_ht' <br>
[ 9.888448] usbcore: registered new interface driver
rt2800usb <br>
[ 9.894671] kmodloader: done loading kernel modules from
/etc/modules.d/* <br>
14.337032] ieee80211 phy0: rt2x00lib_request_firmware: Info -
Loading firmware file 'rt2870.bin' <br>
[ 14.350912] ieee80211 phy0: rt2x00lib_request_firmware: Info -
Firmware detected - version: 0.36 <br>
<br>
<br>
Any advice on fixing this issue?<br>
Thanks<br>
Derek<br>
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