Re: [ARM32] panic when sshd responding

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

andy.shevchenko%gmail.com@localhost wrote:
> 
> I've got a few times (not always) kernel panic on OMAP/H4 when a
> remote client tries to connect to sshd started on OMAP. I'm using the
> NetBSD-current (20080522). There is message and back-trace of it.
> 
> panic: kernel diagnostic assertion "(pg->mdpage.pvh_attrs &
> PVF_KENTRY) == 0" failed: file
> "/home/andy/prj/netbsd/netbsd.se-local/sys/arch/arm/arm32/pmap.c",
> line 3097
> Stopped in pid 436.1 (sshd) at  netbsd:cpu_Debugger+0x4:        bx      r14
> db>
> db> bt
> netbsd:panic+0x14
>         scp=0x8040f69c rlv=0x80495fc0 (netbsd:__kernassert+0x44)
>         rsp=0x82db0db0 rfp=0x82db0dc4
> netbsd:__kernassert+0xc
>         scp=0x80495f88 rlv=0x804789f4 (netbsd:pmap_kenter_pa+0x2d8)
>         rsp=0x82db0dc8 rfp=0x82db0e00
>         r4=0x80542f50
> netbsd:pmap_kenter_pa+0x10
>         scp=0x8047872c rlv=0x804362d8 (netbsd:sosend+0x5cc)
>         rsp=0x82db0e04 rfp=0x82db0e6c
>         r10=0x00001200 r9=0x0000157f
>         r8=0x811c2264 r7=0x82db0eb4 r6=0x81161b00 r5=0x00000001
>         r4=0x82f36000
> netbsd:sosend+0xc
>         scp=0x80435d18 rlv=0x8041f8a8 (netbsd:soo_write+0x3c)
>         rsp=0x82db0e70 rfp=0x82db0e8c
>         r10=0x8050f108 r9=0x00000004
>         r8=0x2063b000 r7=0x00000006 r6=0x82db0f60 r5=0x0000277f
>         r4=0x811c2264

If it's virtual cache alias issue, you could hide the problem by
options SOSEND_NO_LOAN in your kernel config for workaround.
---
Izumi Tsutsui