On Tue, 2011-05-10 at 10:29 -0500, James Bottomley wrote: > On Tue, 2011-05-10 at 15:35 +0100, Mel Gorman wrote: > > On Tue, May 10, 2011 at 09:01:04AM -0500, James Bottomley wrote: > > > On Tue, 2011-05-10 at 11:21 +0100, Mel Gorman wrote: > > > > I really would like to hear if the fix makes a big difference or > > > > if we need to consider forcing SLUB high-order allocations bailing > > > > at the first sign of trouble (e.g. by masking out __GFP_WAIT in > > > > allocate_slab). Even with the fix applied, kswapd might be waking up > > > > less but processes will still be getting stalled in direct compaction > > > > and direct reclaim so it would still be jittery. > > > > > > "the fix" being this > > > > > > https://lkml.org/lkml/2011/3/5/121 > > > > > > > Drop this for the moment. It was a long shot at best and there is little > > evidence the problem is in this area. > > > > I'm attaching two patches. The first is the NO_KSWAPD one to stop > > kswapd being woken up by SLUB using speculative high-orders. The second > > one is more drastic and prevents slub entering direct reclaim or > > compaction. It applies on top of patch 1. These are both untested and > > afraid are a bit rushed as well :( > > Preliminary results with both patches applied still show kswapd > periodically going up to 99% but it doesn't stay there, it comes back > down again (and, obviously, the system doesn't hang). This is a second run with the watch highorders. At the end of the run, the system hung temporarily and now comes back with CPU3 spinning in all system time at kswapd shrink_slab James --- 97 instances order=1 atomic gfp_flags=GFP_ATOMIC|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => scsi_pool_alloc_command+0x29/0x68 <ffffffff812f3063> => scsi_host_alloc_command+0x1f/0x6b <ffffffff812f30e9> 127 instances order=1 normal gfp_flags=GFP_KERNEL => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => __get_free_pages+0xe/0x4a <ffffffff810d89d2> => copy_process+0xe1/0x10c5 <ffffffff810533d4> => do_fork+0x104/0x286 <ffffffff810544f7> => sys_clone+0x28/0x2a <ffffffff8101150e> => stub_clone+0x13/0x20 <ffffffff81009ea3> 2 instances order=3 normal gfp_flags=GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => bvec_alloc_bs+0xae/0xcc <ffffffff81144d81> => bio_alloc_bioset+0x75/0xc3 <ffffffff81144e14> 47 instances order=2 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_RECLAIMABLE| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => radix_tree_preload+0x31/0x81 <ffffffff812293b9> => add_to_page_cache_locked+0x56/0x118 <ffffffff810d57d5> 1 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc_trace+0x7b/0xd8 <ffffffff8110e2ce> => inode_doinit_with_dentry+0x124/0x45c <ffffffff811e96db> => selinux_d_instantiate+0x1c/0x1e <ffffffff811e9a2f> 3 instances order=2 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => __kmalloc+0xb1/0x10d <ffffffff8110dfdb> => kzalloc.constprop.15+0x13/0x15 [i915] <ffffffffa007a956> => i915_gem_alloc_object+0x27/0x111 [i915] <ffffffffa007e4b3> 4 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => mmap_region+0x1b7/0x446 <ffffffff810f6575> => do_mmap_pgoff+0x298/0x2f2 <ffffffff810f6a9c> 27 instances order=1 normal gfp_flags=GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => __page_cache_alloc+0x77/0x7e <ffffffff810d5778> => __do_page_cache_readahead+0x9b/0x177 <ffffffff810dd76b> => ra_submit+0x21/0x25 <ffffffff810ddaad> => ondemand_readahead+0x1c9/0x1d8 <ffffffff810ddc7a> => page_cache_async_readahead+0x7b/0xa3 <ffffffff810ddd04> => generic_file_aio_read+0x2bd/0x5e0 <ffffffff810d6510> 159 instances order=2 normal gfp_flags=GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => mempool_alloc_slab+0x15/0x17 <ffffffff810d6e81> => mempool_alloc+0x68/0x116 <ffffffff810d70f6> 446 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => get_empty_filp+0x7a/0x141 <ffffffff8111f2f1> => do_filp_open+0xe7/0x60a <ffffffff81129bef> 1 instances order=3 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => arch_dup_task_struct+0x42/0x8b <ffffffff81010f47> => copy_process+0xf9/0x10c5 <ffffffff810533ec> 1 instances order=3 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => __kmalloc_node_track_caller+0xcf/0x131 <ffffffff8110ffc6> => __alloc_skb+0x75/0x133 <ffffffff813b5e4c> => sk_stream_alloc_skb+0x38/0xd3 <ffffffff813fc5a9> 1 instances order=1 atomic gfp_flags=GFP_ATOMIC|GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => __page_cache_alloc+0x77/0x7e <ffffffff810d5778> => grab_cache_page_write_begin+0x54/0x9e <ffffffff810d5943> => ext4_da_write_begin+0x13f/0x20e <ffffffff81196396> => generic_file_buffered_write+0x109/0x23a <ffffffff810d5408> => __generic_file_aio_write+0x242/0x272 <ffffffff810d617d> => generic_file_aio_write+0x58/0xa6 <ffffffff810d6205> 25 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => get_empty_filp+0x7a/0x141 <ffffffff8111f2f1> => alloc_file+0x1e/0xbf <ffffffff8111f3d6> 115 instances order=1 normal gfp_flags=GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => bvec_alloc_bs+0xae/0xcc <ffffffff81144d81> => bio_alloc_bioset+0x75/0xc3 <ffffffff81144e14> 56 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_RECLAIMABLE| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => d_alloc+0x26/0x18d <ffffffff8112e4e5> => d_alloc_and_lookup+0x2c/0x6b <ffffffff81126d2e> 1 instances order=1 normal gfp_flags=GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => alloc_buffer_head+0x21/0x49 <ffffffff81141405> => alloc_page_buffers+0x32/0xce <ffffffff81141533> 9 instances order=9 normal gfp_flags=GFP_HIGHUSER_MOVABLE|GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_vma+0xf5/0xfa <ffffffff81107021> => khugepaged+0x543/0xf2d <ffffffff81113ce1> => kthread+0x84/0x8c <ffffffff8106f2df> => kernel_thread_helper+0x4/0x10 <ffffffff8100a9a4> 347 instances order=3 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_RECLAIMABLE| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => ext4_alloc_inode+0x1a/0x111 <ffffffff8119f4b8> => alloc_inode+0x1d/0x78 <ffffffff81131805> 56 instances order=1 normal gfp_flags=GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => __page_cache_alloc+0x77/0x7e <ffffffff810d5778> => grab_cache_page_write_begin+0x54/0x9e <ffffffff810d5943> => ext4_da_write_begin+0x13f/0x20e <ffffffff81196396> => generic_file_buffered_write+0x109/0x23a <ffffffff810d5408> => __generic_file_aio_write+0x242/0x272 <ffffffff810d617d> => generic_file_aio_write+0x58/0xa6 <ffffffff810d6205> 60 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => dup_mm+0x1f8/0x486 <ffffffff81053039> => copy_process+0x917/0x10c5 <ffffffff81053c0a> 1 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => bprm_mm_init+0x70/0x1a0 <ffffffff811239ca> => do_execve+0xd6/0x277 <ffffffff81123df4> 6 instances order=9 normal gfp_flags=GFP_HIGHUSER_MOVABLE|GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_vma+0xf5/0xfa <ffffffff81107021> => do_huge_pmd_anonymous_page+0xbf/0x261 <ffffffff81115b8a> => handle_mm_fault+0x113/0x1ce <ffffffff810f1710> => do_page_fault+0x358/0x37a <ffffffff814741ae> => page_fault+0x25/0x30 <ffffffff81471455> 6 instances order=3 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_REPEAT|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => __kmalloc_node_track_caller+0xcf/0x131 <ffffffff8110ffc6> => __alloc_skb+0x75/0x133 <ffffffff813b5e4c> => sock_alloc_send_pskb+0xb4/0x2d7 <ffffffff813b23aa> 2 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => do_brk+0x1cd/0x293 <ffffffff810f5fd8> => load_elf_binary+0xd2d/0x175f <ffffffff8115ccf2> 4 instances order=1 normal gfp_flags=GFP_KERNEL => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => __get_free_pages+0xe/0x4a <ffffffff810d89d2> => copy_process+0xe1/0x10c5 <ffffffff810533d4> => do_fork+0x104/0x286 <ffffffff810544f7> => kernel_thread+0x75/0x77 <ffffffff81010bb6> => kthreadd+0xe7/0x124 <ffffffff8106f61f> => kernel_thread_helper+0x4/0x10 <ffffffff8100a9a4> 4 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_REPEAT|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc_node+0x93/0x12d <ffffffff8110e1b9> => __alloc_skb+0x40/0x133 <ffffffff813b5e17> => sock_alloc_send_pskb+0xb4/0x2d7 <ffffffff813b23aa> 534 instances order=2 normal gfp_flags=GFP_KERNEL|GFP_REPEAT|GFP_COMP => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => kmalloc_large_node+0x56/0x95 <ffffffff8146a57d> => __kmalloc_node_track_caller+0x31/0x131 <ffffffff8110ff28> => __alloc_skb+0x75/0x133 <ffffffff813b5e4c> => sock_alloc_send_pskb+0xb4/0x2d7 <ffffffff813b23aa> => sock_alloc_send_skb+0x15/0x17 <ffffffff813b25e2> => unix_stream_sendmsg+0x11e/0x2ec <ffffffff8143d237> => __sock_sendmsg+0x69/0x76 <ffffffff813af798> 1 instances order=2 normal gfp_flags=GFP_KERNEL|GFP_COMP|GFP_ZERO => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => __get_free_pages+0xe/0x4a <ffffffff810d89d2> => kmalloc_order_trace+0x2c/0x5e <ffffffff8110c738> => __kmalloc+0x37/0x10d <ffffffff8110df61> => kzalloc.constprop.19+0xe/0x10 <ffffffff810b8d8c> => tracing_open_pipe+0x40/0x147 <ffffffff810b907a> => __dentry_open+0x161/0x283 <ffffffff8111c97c> 1 instances order=1 normal gfp_flags=GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => __page_cache_alloc+0x77/0x7e <ffffffff810d5778> => __do_page_cache_readahead+0x9b/0x177 <ffffffff810dd76b> => ra_submit+0x21/0x25 <ffffffff810ddaad> => filemap_fault+0x17b/0x36c <ffffffff810d6ada> => __do_fault+0x55/0x377 <ffffffff810ee887> => handle_pte_fault+0x2a7/0x7a5 <ffffffff810f0f43> 55 instances order=1 atomic gfp_flags=GFP_ATOMIC|GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => mempool_alloc_slab+0x15/0x17 <ffffffff810d6e81> => mempool_alloc+0x68/0x116 <ffffffff810d70f6> 8 instances order=3 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => shmem_alloc_inode+0x1a/0x2f <ffffffff810e58c0> => alloc_inode+0x1d/0x78 <ffffffff81131805> 563 instances order=3 atomic gfp_flags=GFP_ATOMIC|GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => mempool_alloc_slab+0x15/0x17 <ffffffff810d6e81> => mempool_alloc+0x68/0x116 <ffffffff810d70f6> 12 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => __split_vma+0x6c/0x21b <ffffffff810f50b9> => split_vma+0x20/0x22 <ffffffff810f59c6> 5 instances order=2 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_REPEAT|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => __kmalloc_node_track_caller+0xcf/0x131 <ffffffff8110ffc6> => __alloc_skb+0x75/0x133 <ffffffff813b5e4c> => sock_alloc_send_pskb+0xb4/0x2d7 <ffffffff813b23aa> 1 instances order=1 normal gfp_flags=GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => __get_free_pages+0xe/0x4a <ffffffff810d89d2> => __pollwait+0x5e/0xcc <ffffffff8112ca07> => sock_poll_wait+0x18/0x1d <ffffffff8143cc70> => unix_poll+0x1c/0x9a <ffffffff8143cc91> => sock_poll+0x1a/0x1c <ffffffff813ad43a> => do_select+0x2fb/0x4f5 <ffffffff8112cf33> 145216 instances order=1 normal gfp_flags=GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_NOMEMALLOC| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => mempool_alloc_slab+0x15/0x17 <ffffffff810d6e81> => mempool_alloc+0x68/0x116 <ffffffff810d70f6> 48 instances order=2 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP|GFP_RECLAIMABLE| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => proc_alloc_inode+0x20/0x91 <ffffffff811682bc> => alloc_inode+0x1d/0x78 <ffffffff81131805> 1 instances order=3 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => copy_process+0xc6/0x10c5 <ffffffff810533b9> => do_fork+0x104/0x286 <ffffffff810544f7> 31 instances order=1 normal gfp_flags=GFP_IO|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => kmem_cache_alloc+0x77/0x105 <ffffffff8110e44c> => prepare_creds+0x26/0xae <ffffffff81074d4b> => sys_faccessat+0x37/0x162 <ffffffff8111d275> 1 instances order=3 atomic gfp_flags=GFP_ATOMIC|GFP_NOWARN|GFP_NORETRY|GFP_COMP| => __alloc_pages_nodemask+0x754/0x792 <ffffffff810dc0da> => alloc_pages_current+0xbe/0xd8 <ffffffff81105455> => alloc_slab_page+0x1c/0x4d <ffffffff8110c5fa> => new_slab+0x50/0x199 <ffffffff8110dc44> => __slab_alloc+0x24a/0x328 <ffffffff8146ab86> => __kmalloc_node_track_caller+0xcf/0x131 <ffffffff8110ffc6> => __alloc_skb+0x75/0x133 <ffffffff813b5e4c> => __netdev_alloc_skb+0x1f/0x3b <ffffffff813b5f6a> High-order normal allocations: 147471 High-order atomic allocations: 720 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . 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