Date: Thu, 24 Sep 2015 17:41:11 +0000 From: Mark Johnston <markj@FreeBSD.org> To: suresh gumpula <gsuryacse7k@gmail.com> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: system map mutex and zone mutex witness warning Message-ID: <20150924173916.GA78083@muskytusk> In-Reply-To: <CAJOqHmiS5AjZX%2BVHpuNt67UpYwtsq_e5RQBAkWcRWbu0GYmdPA@mail.gmail.com> References: <CAJOqHmiS5AjZX%2BVHpuNt67UpYwtsq_e5RQBAkWcRWbu0GYmdPA@mail.gmail.com>
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On Wed, Sep 23, 2015 at 11:04:19PM -0400, suresh gumpula wrote: > Hi, > I am seeing the following witness warning while booting on 8.1. Is > it a known issue and > resolved in later kernels ? Can somebody please comment on this ? I've seen this occur when multiple threads race to establish a lock order: https://svnweb.freebsd.org/changeset/base/284127 The change should apply to 8.1, but there may be other relevant bug fixes missing. > > isitmychild: rmatrix mismatch between system map (index 43) and UMA zone > (index 57): w_rmatrix[43][57] == 1 but w_rmatrix[57][43] == 0 > KDB: stack backtrace: > kdb_backtrace() at kdb_backtrace+0x3e > witness_line() at witness_line+0xca4 > witness_line() at witness_line+0xcf9 > witness_releaseok() at witness_releaseok+0x1623 > witness_checkorder() at witness_checkorder+0x37e > _mtx_lock_flags() at _mtx_lock_flags+0x113 > uma_zalloc_arg() at uma_zalloc_arg+0x1449 > vmspace_swap_count() at vmspace_swap_count+0xc52 > uma_zalloc_arg() at uma_zalloc_arg+0x10e6 > uma_zalloc_arg() at uma_zalloc_arg+0x5ef > vmspace_alloc() at vmspace_alloc+0x180 > vm_map_init() at vm_map_init+0xec > vm_map_insert() at vm_map_insert+0x4cb > kmem_malloc() at kmem_malloc+0x3de > zone_drain() at zone_drain+0x822 > uma_large_malloc() at uma_large_malloc+0x4e > malloc() at malloc+0x251 > swap_pager_swap_init() at swap_pager_swap_init+0x219 > vm_pageout_oom() at vm_pageout_oom+0x952 > fork_exit() at fork_exit+0x185 > fork_trampoline() at fork_trampoline+0xe > --- trap 0, rip = 0, rsp = 0xffffff806bb61d30, rbp = 0 --- > Witness disabled. > > > Thanks > Suresh > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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