[Bug 193400] New: [mips] r269577 broke operation on MIPS32

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Sat Sep 6 21:20:12 UTC 2014


            Bug ID: 193400
           Summary: [mips] r269577 broke operation on MIPS32
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: mips
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: adrian at freebsd.org

Hi Gleb!

This commit has broken mips32 on my 128MB RAM routerstation pro board.

I've tested the commit before this one (and it works).

I've also tested today's -HEAD as there was some subsequent fixes to
the sfbuf code. It hasn't completely fixed things - I still see
processes throwing VM errors:

umass0:0:0: Attached to scbus0
Trying to mount root from ufs:redboot/rootfs.uzip []...
warning: no time-of-day clock registered, system time will not be set
da0 at umass-sim0 bus 0 scbus0 target 0 lun 0
da0: <Generic STORAGE DEVICE 9451> Removable Direct Access SCSI-0 device
da0: Serial Number 000000009451
da0: 40.000MB/s transfers
da0: 3902MB (7991296 512 byte sectors: 255H 63S/T 497C)
da0: quirks=0x3<NO_SYNC_CACHE,NO_6_BYTE>
Aug 28 08:07:57 init: login_getclass: unknown class 'daemon'
BAD_PAGE_FAULT: pid 27 tid 100045 (mount), uid 0: pc 0x40514dd0 got a
read fault (type 0x2) at 0x4040011c
Trapframe Register Dump:
        zero: 0 at: 0x7fffffff  v0: 0   v1: 0x404000fc
        a0: 0x54        a1: 0x40400000  a2: 0   a3: 0x1
        t0: 0   t1: 0x40c0300c  t2: 0x40800168  t3: 0x2f
        t4: 0x40c00030  t5: 0   t6: 0x748       t7: 0x402c70
        t8: 0x13        t9: 0x40514d58  s0: 0x3 s1: 0x40418798
        s2: 0   s3: 0x404ec4    s4: 0x40418798  s5: 0x40418798
        s6: 0   s7: 0   k0: 0   k1: 0
        gp: 0x405ec910  sp: 0x7ffee348  s8: 0   ra: 0x4051534c
        sr: 0xfc13      mullo: 0x6719   mulhi: 0xc      badvaddr: 0x4040011c
        cause: 0x8      pc: 0x40514dd0
Page table info for pc address 0x40514dd0: pde = 0x813da000, pte = 0xa00569da
Dumping 4 words starting at pc address 0x40514dd0:
8c700020 32030ff0 00032102 240300ff
Page table info for bad address 0x4040011c: pde = 0x813da000, pte = 0
pid 27 (mount), uid 0: exited on signal 11
*** Populating /var ..

.. so how can we debug what's going on?

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