Date: Sat, 22 Dec 2012 13:11:09 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-current@FreeBSD.org Subject: double fault [Was: clang compiled kernel panic when mounting zfs root on i386] Message-ID: <50D5954D.5090509@FreeBSD.org> In-Reply-To: <201212211738.08781.hselasky@c2i.net> References: <50b37d46.8584440a.735c.ffffb4e6@mx.google.com> <50CF9AA9.1030808__28729.3355250315$1355782864$gmane$org@FreeBSD.org> <50D2F3FE.1000509@gmail.com> <201212211738.08781.hselasky@c2i.net>
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on 21/12/2012 18:38 Hans Petter Selasky said the following: > I've built a 10-current i386 kernel as of today, and I see double fault when > USB audio is allocating memory. Anyone knows why? > > kdb_enter() > vpanic() > panic() > dblfault_handler() > vm_map_lookup() > vm_fault_hold() > vm_fault() > vm_fault_wire() > vm_map_wire() > kmem_alloc_attr(xxx, 0x4000,2,0,0xffffffff) > bus_dmamem_alloc() > usb_pc_alloc_mem() I suspect that this double fault may have nothing to do with the thread to which you followed up. You need to obtain full debug information to answer your question. -- Andriy Gapon
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