Hi Andri, i have DilOS with gcc-4.8,5 (+ special patches) for illumos builds. i had some problems with zdb - found it by zfs tests.
problem has been fixed by disable of optimization : -fno-aggressive-loop-optimizations also, i have added: -fno-ipa-sra but i no remember a story why i have added it ;) probabbly it was added with another illumos component and new gcc-4.8 As you know, illumos still is using gcc-4.4.4 and some newer compilers can produce new issues with older code :) I think, you can try to play with your clang optimization flags too. i have no experience with clang. best regards, -Igor > On Jun 22, 2016, at 4:21 PM, Andriy Gapon <a...@freebsd.org> wrote: > > I am getting the following panic using the latest FreeBSD head that is > synchronized with OpenZFS code as of > illumos/illumos-gate@26455f9efcf9b1e44937d4d86d1ce37b006f25a9. > > panic: solaris assert: ba.ba_phys->bt_bytes == 0 (0x400 == 0x0), file: > /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/bptree.c, line: 292 > cpuid = 1 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > 0xfffffe004db9d310 > vpanic() at vpanic+0x182/frame 0xfffffe004db9d390 > panic() at panic+0x43/frame 0xfffffe004db9d3f0 > assfail3() at assfail3+0x2c/frame 0xfffffe004db9d410 > bptree_iterate() at bptree_iterate+0x35e/frame 0xfffffe004db9d540 > dsl_scan_sync() at dsl_scan_sync+0x24f/frame 0xfffffe004db9d890 > spa_sync() at spa_sync+0x897/frame 0xfffffe004db9dad0 > txg_sync_thread() at txg_sync_thread+0x383/frame 0xfffffe004db9dbb0 > fork_exit() at fork_exit+0x84/frame 0xfffffe004db9dbf0 > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe004db9dbf0 > --- trap 0, rip = 0, rsp = 0, rbp = 0 --- > > I have a crash dump, but unfortunately it's hard to work with it, > because a lot of useful information got "optimized out" by clang. > > I can reproduce the panic using a synthetic workload, but I do not have > a concise reproduction scenario. Every time the panic happens bt_bytes > is 0x400, I haven't seen any other number there. > > Does anyone have an idea what could be causing this? > I can try any diagnostic code that might shed more light. > Thank you! > > -- > Andriy Gapon > ------------------------------------------- openzfs-developer Archives: https://www.listbox.com/member/archive/274414/=now RSS Feed: https://www.listbox.com/member/archive/rss/274414/28015062-cce53afa Modify Your Subscription: https://www.listbox.com/member/?member_id=28015062&id_secret=28015062-f966d51c Powered by Listbox: http://www.listbox.com
