Hi tech@. (Maybe related to http://marc.info/?l=openbsd-bugs&m=146174654219490&w=2).
Crashing server acts as a carp backup (master has same hardware config but don't crash, in contrast to backup). Will post additional information if necessary. There's a collection of crashes (including pre 5.9) but see below for most recent ones. Any advice to track down the issue? Thanks, Alexey OpenBSD 5.9-stable (GENERIC.MP) #0: Sun Mar 27 16:03:33 EEST 2016 ***@***:/usr/src/sys/arch/amd64/compile/GENERIC.MP Apr 15: ddb{2}> show panic the kernel did not panic ddb{2}> trace pool_do_get() at pool_do_get+0x90 pool_get() at pool_get+0xb5 ffs_vget() at ffs_vget+0xa7 ufs_lookup() at ufs_lookup+0x36f VOP_LOOKUP() at VOP_LOOKUP+0x39 vfs_lookup() at vfs_lookup+0x277 namei() at namei+0x24c dofstatat() at dofstatat+0x94 syscall() at syscall+0x368 --- syscall (number 40) --- end of kernel end trace frame: 0x45ea97030a0, count: -9 0x45e29dc70fa: ddb{2}> show registers rdi 0xffffffff rsi 0x957581e21a424e5c rbp 0xffff8000224a2a10 rbx 0xffffff02290e7810 rdx 0xffff8000224a2a74 rcx 0xffff800000067000 rax 0x5abd427fd20d77f3 r8 0x30 r9 0 r10 0 r11 0xffff8000224a2a10 r12 0xffffffff819694c0 ffs_ino_pool r13 0xffffff122c4b0968 r14 0x9 r15 0x407 rip 0xffffffff811a5340 pool_do_get+0x90 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff8000224a29c0 ss 0x10 pool_do_get+0x90: movq 0(%r13),%rdi Apr 23: ddb{2}> show panic the kernel did not panic ddb{2}> trace pool_p_free() at pool_p_free+0x7e pool_gc_pages() at pool_gc_pages+0xe4 taskq_thread() at taskq_thread+0x6c end trace frame: 0x0, count: -3 ddb{2}> show registers rdi 0xffffffff8194c000 mbpool rsi 0x60329ee8bc5a0776 rbp 0xffff800022171e70 rbx 0xffffff009e7b3300 rdx 0x9fcd61e822213476 rcx 0xddbc8af92f3ff41a rax 0x1000000000 r8 0x1 r9 0xffffff0108eeda00 r10 0x1 r11 0xffffffff811a3e70 pool_page_free r12 0xffffff022d8b7a50 r13 0 r14 0xffffffff8194c000 mbpool r15 0xffff800022171e30 rip 0xffffffff811a5c3e pool_p_free+0x7e cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800022171e20 ss 0x10 pool_p_free+0x7e: movq 0(%rax),%rsi