Hi, Miles Lane (in CC) hit freezing failures in 3.2.0-rc4+ (Linus GIT af968e2) while trying to suspend the machine. Here is the log: [ 4040.037426] Freezing user space processes ... [ 4060.048526] Freezing of tasks failed after 20.01 seconds (2 tasks refusing to freeze, wq_busy=0): [ 4060.048534] Xorg D ffffffff81806240 0 901 847 0x00c00004 [ 4060.048538] ffff8800c3877628 0000000000000086 0000000000000082 ffff8800c38775d8 [ 4060.048551] ffff8800c3877fd8 ffff8800c3877fd8 ffff8800c3877fd8 00000000000136c0 [ 4060.048553] ffff880118b3dc40 ffff8800c2cc1710 ffff8800c38775f8 ffff88011fb13f80 [ 4060.048556] Call Trace: [ 4060.048562] [<ffffffff811a6940>] ? __wait_on_buffer+0x30/0x30 [ 4060.048565] [<ffffffff8165094f>] schedule+0x3f/0x60 [ 4060.048567] [<ffffffff816509ff>] io_schedule+0x8f/0xd0 [ 4060.048569] [<ffffffff811a694e>] sleep_on_buffer+0xe/0x20 [ 4060.048571] [<ffffffff8165121f>] __wait_on_bit+0x5f/0x90 [ 4060.048574] [<ffffffff812ebf08>] ? generic_make_request+0x68/0x70 [ 4060.048577] [<ffffffff811a6940>] ? __wait_on_buffer+0x30/0x30 [ 4060.048579] [<ffffffff816512cc>] out_of_line_wait_on_bit+0x7c/0x90 [ 4060.048582] [<ffffffff81089c90>] ? autoremove_wake_function+0x40/0x40 [ 4060.048584] [<ffffffff811a693e>] __wait_on_buffer+0x2e/0x30 [ 4060.048587] [<ffffffff811a8761>] __bread+0x71/0xb0 [ 4060.048590] [<ffffffff811f377b>] ext3_get_branch+0x8b/0x150 [ 4060.048593] [<ffffffff811f6912>] ext3_get_blocks_handle+0x1a2/0x650 [ 4060.048595] [<ffffffff811a8d65>] ? block_read_full_page+0x225/0x390 [ 4060.048598] [<ffffffff811f6e84>] ext3_get_block+0xc4/0x120 [ 4060.048600] [<ffffffff811b2172>] do_mpage_readpage+0x3b2/0x550 [ 4060.048604] [<ffffffff81116d95>] ? add_to_page_cache_locked+0x85/0xa0 [ 4060.048606] [<ffffffff811b246e>] mpage_readpages+0xee/0x140 [ 4060.048608] [<ffffffff811f6dc0>] ? ext3_get_blocks_handle+0x650/0x650 [ 4060.048610] [<ffffffff8111f3de>] ? __alloc_pages_nodemask+0x10e/0x820 [ 4060.048613] [<ffffffff811f6dc0>] ? ext3_get_blocks_handle+0x650/0x650 [ 4060.048615] [<ffffffff811f328d>] ext3_readpages+0x1d/0x20 [ 4060.048617] [<ffffffff81121908>] read_pages+0x48/0x100 [ 4060.048619] [<ffffffff81121b23>] __do_page_cache_readahead+0x163/0x180 [ 4060.048621] [<ffffffff81121e91>] ra_submit+0x21/0x30 [ 4060.048625] [<ffffffff8163d353>] do_sync_mmap_readahead.isra.24+0x94/0x9c [ 4060.048627] [<ffffffff81118991>] filemap_fault+0x361/0x3e0 [ 4060.048642] [<ffffffffa009c37c>] ? drm_mm_kmalloc+0x6c/0xe0 [drm] [ 4060.048646] [<ffffffff81138c72>] __do_fault+0x72/0x550 [ 4060.048649] [<ffffffff8130ae7b>] ? prio_tree_insert+0x12b/0x1a0 [ 4060.048651] [<ffffffff8113c2aa>] handle_pte_fault+0xfa/0x200 [ 4060.048653] [<ffffffff8113c768>] handle_mm_fault+0x1f8/0x350 [ 4060.048661] [<ffffffffa00dced0>] ? i915_gem_object_set_to_gtt_domain+0x80/0x80 [i915] [ 4060.048664] [<ffffffff816562d0>] do_page_fault+0x150/0x520 [ 4060.048668] [<ffffffff810127da>] ? __switch_to+0x1ea/0x310 [ 4060.048670] [<ffffffff81054f4d>] ? set_next_entity+0xad/0xd0 [ 4060.048673] [<ffffffff8118821a>] ? do_vfs_ioctl+0x8a/0x340 [ 4060.048675] [<ffffffff816502fc>] ? __schedule+0x3cc/0x6f0 [ 4060.048677] [<ffffffff81652fb5>] page_fault+0x25/0x30 [ 4060.048685] gnome-settings- D 0000000000000001 0 1406 1344 0x00800004 [ 4060.048687] ffff8800bd305628 0000000000000082 0000000000000082 ffff8800bd3055d8 [ 4060.048689] ffff8800bd305fd8 ffff8800bd305fd8 ffff8800bd305fd8 00000000000136c0 [ 4060.048692] ffff8800885cdc40 ffff8800c1228000 ffff8800bd3055f8 ffff88011fa93f80 [ 4060.048694] Call Trace: [ 4060.048696] [<ffffffff811a6940>] ? __wait_on_buffer+0x30/0x30 [ 4060.048698] [<ffffffff8165094f>] schedule+0x3f/0x60 [ 4060.048700] [<ffffffff816509ff>] io_schedule+0x8f/0xd0 [ 4060.048702] [<ffffffff811a694e>] sleep_on_buffer+0xe/0x20 [ 4060.048704] [<ffffffff8165121f>] __wait_on_bit+0x5f/0x90 [ 4060.048706] [<ffffffff812ebf08>] ? generic_make_request+0x68/0x70 [ 4060.048708] [<ffffffff811a6940>] ? __wait_on_buffer+0x30/0x30 [ 4060.048710] [<ffffffff816512cc>] out_of_line_wait_on_bit+0x7c/0x90 [ 4060.048712] [<ffffffff81089c90>] ? autoremove_wake_function+0x40/0x40 [ 4060.048714] [<ffffffff811a693e>] __wait_on_buffer+0x2e/0x30 [ 4060.048716] [<ffffffff811a8761>] __bread+0x71/0xb0 [ 4060.048719] [<ffffffff811f377b>] ext3_get_branch+0x8b/0x150 [ 4060.048721] [<ffffffff811f6912>] ext3_get_blocks_handle+0x1a2/0x650 [ 4060.048724] [<ffffffff8104cd93>] ? __wake_up+0x53/0x70 [ 4060.048727] [<ffffffff814072a5>] ? loop_make_request+0xe5/0x120 [ 4060.048729] [<ffffffff812ebaf4>] ? generic_make_request.part.50+0x74/0xb0 [ 4060.048732] [<ffffffff811f6e84>] ext3_get_block+0xc4/0x120 [ 4060.048734] [<ffffffff811b2172>] do_mpage_readpage+0x3b2/0x550 [ 4060.048736] [<ffffffff81116d95>] ? add_to_page_cache_locked+0x85/0xa0 [ 4060.048738] [<ffffffff811b246e>] mpage_readpages+0xee/0x140 [ 4060.048740] [<ffffffff811f6dc0>] ? ext3_get_blocks_handle+0x650/0x650 [ 4060.048742] [<ffffffff8111f3de>] ? __alloc_pages_nodemask+0x10e/0x820 [ 4060.048744] [<ffffffff811f6dc0>] ? ext3_get_blocks_handle+0x650/0x650 [ 4060.048747] [<ffffffff8165135d>] ? mutex_lock+0x1d/0x50 [ 4060.048749] [<ffffffff811f328d>] ext3_readpages+0x1d/0x20 [ 4060.048751] [<ffffffff81121908>] read_pages+0x48/0x100 [ 4060.048753] [<ffffffff81121b23>] __do_page_cache_readahead+0x163/0x180 [ 4060.048755] [<ffffffff81121e91>] ra_submit+0x21/0x30 [ 4060.048757] [<ffffffff8163d353>] do_sync_mmap_readahead.isra.24+0x94/0x9c [ 4060.048759] [<ffffffff81118991>] filemap_fault+0x361/0x3e0 [ 4060.048761] [<ffffffff81188fe0>] ? __pollwait+0xf0/0xf0 [ 4060.048764] [<ffffffff81138c72>] __do_fault+0x72/0x550 [ 4060.048766] [<ffffffff8113c2aa>] handle_pte_fault+0xfa/0x200 [ 4060.048767] [<ffffffff8113c768>] handle_mm_fault+0x1f8/0x350 [ 4060.048769] [<ffffffff816562d0>] do_page_fault+0x150/0x520 [ 4060.048773] [<ffffffff8129a2b3>] ? security_file_permission+0x93/0xb0 [ 4060.048777] [<ffffffff81175f41>] ? rw_verify_area+0x61/0xf0 [ 4060.048778] [<ffffffff811764d5>] ? vfs_read+0x165/0x180 [ 4060.048780] [<ffffffff81652fb5>] page_fault+0x25/0x30 Regards, Srivatsa S. 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