Re: ext2fs panic with Dfly 1.5.2

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

On 01.04.2006, at 09:38, Csaba Henk wrote:
> #10 0xc04a1e9f in calltrap () at 
> /usr/dispatch/src/sys/i386/i386/exception.s:774
> #11 0xc04150c4 in ufs_bmap (ap=0xcaf418f8) at 
> /usr/dispatch/src/sys/vfs/ufs/ufs_bmap.c:96
                    ^^^

> #12 0xc041bba2 in ufs_vnoperate (ap=0x0) at 
> /usr/dispatch/src/sys/vfs/ufs/ufs_vnops.c:2413
                    ^^^

> #13 0xc030054a in vop_bmap (ops=0xc0bfae84, vp=0x0, loffset=Unhandled 
> dwarf expression opcode 0x93
> ) at /usr/dispatch/src/sys/kern/vfs_vopops.c:859
> #14 0xc041b31e in ufs_strategy (ap=0x0) at 
> /usr/dispatch/src/sys/vfs/ufs/ufs_vnops.c:1807
                    ^^^

> #15 0xc041bba2 in ufs_vnoperate (ap=0x0) at 
> /usr/dispatch/src/sys/vfs/ufs/ufs_vnops.c:2413
                    ^^^

> #16 0xc0300580 in vop_strategy (ops=0x0, vp=0xc0ba3908, 
> bio=0xc0bfae30) at /usr/dispatch/src/sys/kern/vfs_vopops.c:874
> #17 0xc02e7304 in vn_strategy (vp=0xc0ba3908, bio=0xc0bfae84) at 
> /usr/dispatch/src/sys/kern/vfs_bio.c:2779
> #18 0xc02e403c in bread (vp=0xc0ba3908, loffset=Unhandled dwarf 
> expression opcode 0x93
> ) at /usr/dispatch/src/sys/kern/vfs_bio.c:608
> #19 0xcaf62914 in ext2_read (ap=0xcaf41a7c) at ext2_readwrite.c:109
                    ^^^^

why on earth does ext2_read cascade to ufs_*?  is that the operation on 
the /dev vnode which is on an ufs?  but then it should be specfs, or 
not?  i'm puzzled.  if this isn't fishy, somebody gotta explain to me 
how reads really run through the kernel until they reach the DMA.

cheers
  simon

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