panic: softdep_disk_io_initiation: read

I've got 3 of these so far (2 on alpha, 1 on i386) since updating to current as of 17 March. panic: softdep_disk_io_initiation: read Debugger("panic") Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0 db> trace Debugger(c041df8a,c04935e0,c0430d64,d7a50b20,1) at D

"panic: softdep_disk_io_initiation: read" on 5.0-R

One of the gohan machines panicked today [1] with the following: panic: softdep_disk_io_initiation: read Debugger("panic") Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0 db> trace Debugger(c04167bc,c048aee0,c0428d55,d8e61b68,1) at Debugger+0x54 panic(c0428d55,0,c042