On Wed, 12 Feb 2014, Christian Kujau wrote: > On Wed, 12 Feb 2014 at 00:11, Christian Kujau wrote: > > After upgrading from 3.13-rc8 to 3.14-rc2 on this PowerPC G4 machine, this > > happened: > > > > ====================================================== > > [ INFO: RECLAIM_FS-safe -> RECLAIM_FS-unsafe lock order detected ] > > 3.14.0-rc2 #1 Not tainted > > ------------------------------------------------------ > > Would this be related to the "mmotm 2014-02-05 list_lru_add lockdep splat" > Hugh posted[0] a few days ago? No, that was due to a patch in mmotm or linux-next: it's not in 3.14-rc2. Hugh > > Christian. > > [0] https://lkml.org/lkml/2014/2/5/878 > > > rm/9206 [HC0[0]:SC0[0]:HE1:SE1] is trying to acquire: > > (&mm->mmap_sem){++++++}, at: [<c00b3654>] might_fault+0x58/0xa0 > > > > and this task is already holding: > > (&(&ip->i_lock)->mr_lock){++++-.}, at: [<c020d3ec>] > > xfs_ilock_data_map_shared+0x28/0x74 > > which would create a new lock dependency: > > (&(&ip->i_lock)->mr_lock){++++-.} -> (&mm->mmap_sem){++++++} > > > > but this new dependency connects a RECLAIM_FS-irq-safe lock: > > (&(&ip->i_lock)->mr_lock){++++-.} > > ... which became RECLAIM_FS-irq-safe at: > > [<c0066b38>] lock_acquire+0x4c/0x68 > > [<c00615fc>] down_write_nested+0x50/0x9c > > [<c01ccf50>] xfs_reclaim_inode+0x108/0x31c > > [<c01cd318>] xfs_reclaim_inodes_ag+0x1b4/0x35c > > [<c01cde40>] xfs_reclaim_inodes_nr+0x38/0x4c > > [<c00d4aec>] super_cache_scan+0x148/0x150 > > [<c00a4c08>] shrink_slab_node+0x134/0x224 > > [<c00a52fc>] shrink_slab+0x124/0x13c > > [<c00a7900>] kswapd+0x460/0x77c > > [<c004f8fc>] kthread+0xbc/0xd0 > > [<c0010ae4>] ret_from_kernel_thread+0x5c/0x64 > > > > to a RECLAIM_FS-irq-unsafe lock: > > (&mm->mmap_sem){++++++} > > ... which became RECLAIM_FS-irq-unsafe at: > > ... [<c00679fc>] lockdep_trace_alloc+0x84/0x104 > > [<c009d86c>] __alloc_pages_nodemask+0x88/0x6b4 > > [<c00161fc>] pte_alloc_one+0x30/0x90 > > [<c00b3b6c>] __pte_alloc+0x20/0xf4 > > [<c00bd1d4>] move_page_tables+0x2a0/0x2c4 > > [<c00d7ff8>] setup_arg_pages+0x20c/0x2c8 > > [<c0122804>] load_elf_binary+0x378/0x1234 > > [<c00d73a0>] search_binary_handler+0x98/0x1c8 > > [<c00d8aa4>] do_execve+0x484/0x574 > > [<c000425c>] try_to_run_init_process+0x18/0x58 > > [<c0004a48>] kernel_init+0xac/0x104 > > [<c0010ae4>] ret_from_kernel_thread+0x5c/0x64 > > [...] > > > > Full dmesg & .config: http://nerdbynature.de/bits/3.14-rc2/ > > > > Thanks, > > Christian. > > -- > > BOFH excuse #17: > > > > fat electrons in the lines > -- > BOFH excuse #17: > > fat electrons in the lines > _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
