On Sun, 4 Nov 2012, Stefan Priebe wrote: > Hello, > > while benchmarking the new v2 rbd format i saw several crashes of KVM. First i > thought this was kernel related but i was just happening faster with one > kernel than the other. Can you try the wip-rbd-read branch? It has a bunch of fixes that aren't in master yet. I haven't seen this specific crash (I don't think), but I was reliable hitting other issues with master that wip-rbd-read reslves. Alternatively, you could cherry-pick b1d866efbdf7e8a7bc083b1f3ea56f24e10c8fcd, which I'm guessing is your problem. Thanks! sage > > The KVM crash / exit looks like this: > librbd/AioCompletion.cc: In function 'void > librbd::AioCompletion::complete_request(CephContext*, ssize_t)' thread > 7f73db67c780 time 2012-11-04 14:59:44.997009 > librbd/AioCompletion.cc: 43: FAILED assert(bl.length() == read_buf_len) > ceph version 0.53-585-ga01b112 (a01b112d71a0b6a1bb206d53867d13536d17bbf6) > 1: (librbd::AioCompletion::complete_request(CephContext*, long)+0xa89) > [0x7f73d9337319] > 2: (librbd::C_AioRead::finish(int)+0x174) [0x7f73d93374e4] > 3: (Context::complete(int)+0xa) [0x7f73d933796a] > 4: (librbd::C_CacheRead::finish(int)+0xe) [0x7f73d933683e] > 5: (Context::complete(int)+0xa) [0x7f73d933796a] > 6: (librbd::ImageCtx::aio_read_from_cache(object_t, ceph::buffer::list*, > unsigned long, unsigned long, Context*)+0x3a0) [0x7f73d9347bd0] > 7: (librbd::aio_read(librbd::ImageCtx*, std::vector<std::pair<unsigned long, > unsigned long>, std::allocator<std::pair<unsigned long, unsigned long> > > > const&, char*, ceph::buffer::list*, librbd::AioCompletion*)+0x765) > [0x7f73d9354995] > 8: (librbd::aio_read(librbd::ImageCtx*, unsigned long, unsigned long, char*, > ceph::buffer::list*, librbd::AioCompletion*)+0xa2) [0x7f73d9354f92] > 9: (()+0x9f2de) [0x7f73db73d2de] > 10: (()+0x9f490) [0x7f73db73d490] > 11: (()+0x83c45) [0x7f73db721c45] > 12: (()+0x850ea) [0x7f73db7230ea] > NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to > interpret this. > terminate called after throwing an instance of 'ceph::FailedAssertion' > > Stefan > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
