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Feature #9544

Enable RADIX_MPATH

Added by Jim Pingle over 1 year ago. Updated about 1 month ago.

Status:
New
Priority:
Normal
Category:
Routing
Target version:
Start date:
05/22/2019
Due date:
% Done:

100%

Estimated time:
(Total: 0.00 h)

Description

Add RADIX_MPATH to the kernel, assuming it does not cause any conflicts with existing options we need.

Adding to 2.5.0 Per Jim T.


Subtasks

pfSense Packages - Feature #9545: Enable MULTIPATH in FRRNewJim Pingle

History

#1 Updated by Renato Botelho about 1 year ago

  • Status changed from New to Feedback
  • Assignee set to Renato Botelho

option added to amd64/arm/arm64 kernels

#2 Updated by Jim Pingle 10 months ago

There have been reports of instability with some routing scenarios since this was enabled. We shouldn't take any action on it until after base is shifted to 12-STABLE. If problems persist then we may want to back this out (and #9545)

#3 Updated by Jim Pingle 7 months ago

See also: #10397

#4 Updated by Jim Pingle 6 months ago

Still seeing reports of instability after moving to 12.1-STABLE. For example: https://forum.netgate.com/topic/153418/2020-05-report/2

<3>rn_delete: couldn't find our annotation

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 10
fault virtual address    = 0x70
fault code        = supervisor read data, page not present
instruction pointer    = 0x20:0xffffffff80ebbde6
stack pointer            = 0x28:0xfffffe0097fc44e0
frame pointer            = 0x28:0xfffffe0097fc45d0
code segment        = base 0x0, limit 0xfffff, type 0x1b
            = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags    = interrupt enabled, resume, IOPL = 0
current process        = 52022 (zebra_dplane)
trap number        = 12
panic: page fault
cpuid = 0
time = 1589051672
KDB: enter: panic
Tracing pid 52022 tid 101001 td 0xfffff8042ce89740
kdb_enter() at kdb_enter+0x37/frame 0xfffffe0097fc4140
vpanic() at vpanic+0x19a/frame 0xfffffe0097fc41a0
panic() at panic+0x43/frame 0xfffffe0097fc4200
trap_pfault() at trap_pfault/frame 0xfffffe0097fc4270
trap_pfault() at trap_pfault+0x4f/frame 0xfffffe0097fc42e0
trap() at trap+0x288/frame 0xfffffe0097fc4410
calltrap() at calltrap+0x8/frame 0xfffffe0097fc4410
--- trap 0xc, rip = 0xffffffff80ebbde6, rsp = 0xfffffe0097fc44e0, rbp = 0xfffffe0097fc45d0 ---
rtrequest1_fib() at rtrequest1_fib+0x296/frame 0xfffffe0097fc45d0
route_output() at route_output+0xd95/frame 0xfffffe0097fc4850
sosend_generic() at sosend_generic+0x4ea/frame 0xfffffe0097fc4900
sosend() at sosend+0x50/frame 0xfffffe0097fc4930
soo_write() at soo_write+0x32/frame 0xfffffe0097fc4970
dofilewrite() at dofilewrite+0xb0/frame 0xfffffe0097fc49c0
sys_write() at sys_write+0xc0/frame 0xfffffe0097fc4a30
amd64_syscall() at amd64_syscall+0x357/frame 0xfffffe0097fc4b70
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0097fc4b70

#5 Updated by Jim Pingle 6 months ago

There are four known issues with RADIX_MPATH in FreeBSD, three of which can lead to a panic:

https://bugs.freebsd.org/bugzilla/buglist.cgi?quicksearch=radix_mpath&list_id=354350

The backtrace above appears to match the second screenshot on https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241191

#6 Updated by Jim Pingle about 1 month ago

  • Status changed from Feedback to New
  • Target version changed from 2.5.0 to Future

This was too unstable to keep for the time being. Retargeting to Future for now. Will revisit when stability issues in FreeBSD have been addressed.

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