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Subject[XFS] Kernel (2.6.11) deadlock in user mode when writing data through mmap on large files (64-bit systems)
Hi again,

It seems that this bug is _only_ related to XFS - EXT3 tests were
successfull, but the same test run on an XFS filesystem crashed.


ngtest D ffff810078303468 0 20514 20505 (NOTLB)
ffff810078302eb8 0000000000000086 00000001013820a7 0000000000000008
0000000000000086 0000006e7c5cfe88 ffffffff805915c0 ffff81007fe095a0
000000000000006e ffff810002c1a780
Call Trace:<ffffffff80139d89>{__mod_timer+318}
<ffffffff803782c2>{schedule_timeout+165}
<ffffffff8013a8d0>{process_timeout+0}
<ffffffff803781ff>{io_schedule_timeout+49}
<ffffffff802b94cf>{blk_congestion_wait+151}
<ffffffff80145f95>{autoremove_wake_function+0}
<ffffffff80145f95>{autoremove_wake_function+0}
<ffffffff8022982e>{kmem_alloc+210}
<ffffffff802298cd>{kmem_realloc+43}
<ffffffff8020d181>{xfs_iext_realloc+245}
<ffffffff801e62a8>{xfs_bmap_insert_exlist+53}
<ffffffff801e7194>{xfs_bmap_add_extent_hole_real+949}
<ffffffff801e84df>{xfs_bmap_add_extent+4759}
<ffffffff8021f92e>{xfs_trans_brelse+84}
<ffffffff8021faa8>{xfs_trans_log_buf+107}
<ffffffff801dbb04>{xfs_alloc_ag_vextent+4013}
<ffffffff8022995c>{kmem_zone_alloc+70}
<ffffffff801f215f>{xfs_btree_init_cursor+72}
<ffffffff801eb7b7>{xfs_bmapi+6221}
<ffffffff801e8be8>{xfs_bmap_do_search_extents+778}
<ffffffff80210443>{xfs_iomap_write_direct+646}
<ffffffff803786c7>{__down_write+129}
<ffffffff80145f95>{autoremove_wake_function+0}
<ffffffff8020ff2d>{xfs_iomap+569}
<ffffffff802ba0ad>{submit_bio+221}
<ffffffff80229b83>{xfs_map_blocks+66}
<ffffffff8022a844>{xfs_page_state_convert+996}
<ffffffff8017281c>{__set_page_dirty_buffers+191}
<ffffffff801653c5>{page_referenced_file+209}
<ffffffff80173958>{alloc_buffer_head+50}
<ffffffff80173fa5>{alloc_page_buffers+99}
<ffffffff8022af95>{linvfs_writepage+179}
<ffffffff8015a457>{shrink_zone+3000}
<ffffffff8022ab3d>{__linvfs_get_block+136}
<ffffffff80241fc2>{__memset+50}
<ffffffff80192ed3>{do_mpage_readpage+949}
<ffffffff80157148>{do_drain+0} <ffffffff8012b801>{try_to_wake_up+755}
<ffffffff8023e937>{radix_tree_node_alloc+19}
<ffffffff8023eb29>{radix_tree_insert+291}
<ffffffff8015aa0c>{try_to_free_pages+278}
<ffffffff801534d8>{__alloc_pages+531}
<ffffffff8015575e>{__do_page_cache_readahead+215}
<ffffffff8014fe07>{filemap_nopage+347}
<ffffffff8015f511>{do_no_page+984}
<ffffffff8015f8e4>{handle_mm_fault+419}
<ffffffff80378992>{_spin_unlock_irqrestore+5}
<ffffffff8011d090>{do_page_fault+1185}
<ffffffff8010dd9d>{error_exit+0}

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