> From: Eric Grosse <gro...@gmail.com> > Date: Mon, 10 Jun 2024 11:17:23 -0700 > > A bit of progress: in a kernel built with George Koehler's suggested > replacement of isync by sync and with uncommented GENERIC.MP > option MP_LOCKDEBUG > option WITNESS > and (getting rid of any dependence on Go) generating load > by running make -j64 build in /usr/src, I fairly quickly get a panic: > > panic: acquiring blockable sleep lock with spinlock or critical > section held (rwlock) kmmaplk > Stopped at panic+0x134: ori r0,r0,0x0 > TID PID UID PRFLAGS PFLAGS CPU COMMAND > 484082 12380 21 0x18000003 0 7 cc > 104407 11776 21 0x18000003 0 3 cc > 182886 45104 21 0x18000003 0 6 cc > 385115 79953 21 0x18000003 0 2 cc > 158768 20484 0 0x14000 0x200 5 zerothread > *413982 47818 0 0x14000 0x200 1 reaper > panic+0x134 > witness_checkorder+0x954 > rw_enter_read+0x8c > vm_map_lock_read_ln+0x38 > uvmfault_lookup+0x114 > uvm_fault_check+0x68 > uvm_fault+0x12c > trap+0x7a4 > trapagain+0x4 > --- trap (type 0x300) --- > pmap_remove+0x120 > uvm_unmap_kill_entry_withlock+0x1c0 > uvm_map_teardown+0x184 > uvmspace_free+0x70 > uvm_exit+0x38 > https://www.openbsd.org/ddb.html describes the minimum info required in bug > reports. Insufficient info makes it difficult to find and fix bugs. > ddb{1}>
dv@ posted a very similar crash that happened on amd64 a few days ago: https://marc.info/?l=openbsd-bugs&m=171761402618985&w=2
