From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: Re: btrfs hang on brd Date: Fri, 03 Jun 2011 12:41:18 +0300 Message-ID: <4DE8AC3E.8020908@intel.com> References: <4DE492B0.9020302@linux.intel.com> <20110601085439.GD12709@twin.jikos.cz> <4DE60F44.6090400@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: chris.mason@oracle.com, linux-btrfs@vger.kernel.org To: dave@jikos.cz Return-path: In-Reply-To: <4DE60F44.6090400@linux.intel.com> List-ID: On 01/06/11 13:07, Adrian Hunter wrote: > On 01/06/11 11:54, David Sterba wrote: >> On Tue, May 31, 2011 at 10:03:12AM +0300, Adrian Hunter wrote: >>> Hi >>> >>> I seem to be able to get btrfs reproducibly to >>> produce warnings and finally hang when running >>> a stress test on a ramdisk. >>> >>> Testing was done using the "integration-test" >>> branch of btrfs-unstable. Note that I also tested >>> v2.6.39 and "integration-test" took much longer to >>> hang i.e. it is an improvement >>> >>> The test script and stack dumps are below. >>> >>> Is this a valid test? >>> >>> Is it worth me investigating these? >> >> I've tried to reproduce myself, but the fsstress utility (taken from >> latest LTP suite) crashes sometimes and I cannot take it as a proper >> reproduction. Can you point me to the exact version you used? > > The LTP version does not compile properly: > > make[4]: Entering directory > `/home/ahunter/Desktop/Projects/ltp/ltp-full-20110228/testcases/kernel/fs/fsstress' > > gcc -g -O2 -g -O2 -fno-strict-aliasing -pipe -Wall -DNO_XFS > -I/home/ahunter/Desktop/Projects/ltp/ltp-full-20110228/testcases/kernel/fs/fsstress > -D_LARGEFILE64_SOURCE -D_GNU_SOURCE -Wno-error -I../../../../include > -I../../../../include -L../../../../lib fsstress.c -o fsstress > fsstress.c: In function 'dread_f': > fsstress.c:1829:2: warning: implicit declaration of function 'memalign' > fsstress.c:1829:6: warning: assignment makes pointer from integer > without a cast > fsstress.c: In function 'dwrite_f': > fsstress.c:1912:6: warning: assignment makes pointer from integer > without a cast > fsstress.c:1844:17: warning: 'diob.d_miniosz' may be used uninitialized > in this function > fsstress.c:1844:17: warning: 'diob.d_maxiosz' may be used uninitialized > in this function > fsstress.c:1844:17: warning: 'diob.d_mem' may be used uninitialized in > this function > fsstress.c: In function 'dread_f': > fsstress.c:1750:17: warning: 'diob.d_miniosz' may be used uninitialized > in this function > fsstress.c:1750:17: warning: 'diob.d_maxiosz' may be used uninitialized > in this function > fsstress.c:1750:17: warning: 'diob.d_mem' may be used uninitialized in > this function > > > I hacked a couple of changes but I need to check them before > mailing to the ltp-list: > > > From: Adrian Hunter > Date: Wed, 1 Jun 2011 13:01:48 +0300 > Subject: [PATCH] fsstress: quick fix for compile errors > > Signed-off-by: Adrian Hunter > --- > testcases/kernel/fs/fsstress/fsstress.c | 2 ++ > testcases/kernel/fs/fsstress/global.h | 1 + > 2 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/testcases/kernel/fs/fsstress/fsstress.c > b/testcases/kernel/fs/fsstress/fsstress.c > index e3b48ea..83c23ed 100644 > --- a/testcases/kernel/fs/fsstress/fsstress.c > +++ b/testcases/kernel/fs/fsstress/fsstress.c > @@ -1757,6 +1757,7 @@ dread_f(int opno, long r) > struct stat64 stb; > int v; > > + memset(&diob, 0, sizeof(struct dioattr)); > init_pathname(&f); > if (!get_fname(FT_REGFILE, r, &f, NULL, NULL, &v)) { > if (v) > @@ -1851,6 +1852,7 @@ dwrite_f(int opno, long r) > struct stat64 stb; > int v; > > + memset(&diob, 0, sizeof(struct dioattr)); > init_pathname(&f); > if (!get_fname(FT_REGFILE, r, &f, NULL, NULL, &v)) { > if (v) > diff --git a/testcases/kernel/fs/fsstress/global.h > b/testcases/kernel/fs/fsstress/global.h > index f788395..5ab5d56 100644 > --- a/testcases/kernel/fs/fsstress/global.h > +++ b/testcases/kernel/fs/fsstress/global.h > @@ -58,6 +58,7 @@ > #include > #include > #include > +#include > > #ifndef O_DIRECT > #define O_DIRECT 040000 > -- > 1.7.4.4 > > >> (But no warning or hang observed, on top of 3.0-rc1 + cmason/for-linus) > > I will try it tonight. No improvement on 3.0-rc1+ (commit 5c6cce92bc8aee751aafe82c5d9caf7553226a3d). Logs follow: Warnings -------- [ 2857.023360] WARNING: at fs/btrfs/extent-tree.c:5648 btrfs_alloc_free_block+0x14e/0x357 [btrfs]() [ 2857.023364] Hardware name: XPS 8300 [ 2857.023367] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2857.023431] Pid: 8809, comm: btrfs-endio-wri Not tainted 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2857.023435] Call Trace: [ 2857.023461] [] warn_slowpath_common+0x85/0x9d [ 2857.023471] [] warn_slowpath_null+0x1a/0x1c [ 2857.023494] [] btrfs_alloc_free_block+0x14e/0x357 [btrfs] [ 2857.023526] [] ? map_private_extent_buffer+0xb1/0xd5 [btrfs] [ 2857.023547] [] __btrfs_cow_block+0x102/0x31e [btrfs] [ 2857.023565] [] ? unlock_up+0xd9/0xe4 [btrfs] [ 2857.023585] [] btrfs_cow_block+0x104/0x14e [btrfs] [ 2857.023604] [] btrfs_search_slot+0x162/0x502 [btrfs] [ 2857.023625] [] btrfs_insert_empty_items+0x6a/0xba [btrfs] [ 2857.023636] [] ? kmem_cache_alloc+0x29/0xf7 [ 2857.023658] [] insert_reserved_file_extent.clone.34+0xad/0x1fc [btrfs] [ 2857.023680] [] ? lock_extent_bits+0x5e/0xa8 [btrfs] [ 2857.023701] [] btrfs_endio_direct_write+0x171/0x29a [btrfs] [ 2857.023719] [] ? end_workqueue_fn+0xf6/0x10e [btrfs] [ 2857.023728] [] bio_endio+0x2d/0x2f [ 2857.023744] [] end_workqueue_fn+0x101/0x10e [btrfs] [ 2857.023766] [] worker_loop+0x193/0x4ca [btrfs] [ 2857.023786] [] ? btrfs_queue_worker+0x214/0x214 [btrfs] [ 2857.023793] [] kthread+0x82/0x8a [ 2857.023801] [] kernel_thread_helper+0x4/0x10 [ 2857.023807] [] ? kthread_worker_fn+0x14b/0x14b [ 2857.023813] [] ? gs_change+0x13/0x13 [ 2857.023818] ---[ end trace 11fa90e2fd0455a5 ]--- [ 2857.023835] ------------[ cut here ]------------ [ 2857.023851] WARNING: at fs/btrfs/extent-tree.c:5648 btrfs_alloc_free_block+0x14e/0x357 [btrfs]() [ 2857.023856] Hardware name: XPS 8300 [ 2857.023859] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2857.023948] Pid: 8833, comm: btrfs-endio-wri Tainted: G W 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2857.023953] Call Trace: [ 2857.023959] [] warn_slowpath_common+0x85/0x9d [ 2857.023966] [] warn_slowpath_null+0x1a/0x1c [ 2857.023982] [] btrfs_alloc_free_block+0x14e/0x357 [btrfs] [ 2857.023989] [] ? update_stats_wait_end.clone.74+0x6a/0xad [ 2857.024002] [] __btrfs_cow_block+0x102/0x31e [btrfs] [ 2857.024015] [] ? unlock_up+0xd9/0xe4 [btrfs] [ 2857.024028] [] btrfs_cow_block+0x104/0x14e [btrfs] [ 2857.024049] [] ? btrfs_spin_on_block+0x55/0x55 [btrfs] [ 2857.024062] [] btrfs_search_slot+0x162/0x502 [btrfs] [ 2857.024068] [] ? slab_pre_alloc_hook.clone.33+0x2d/0x31 [ 2857.024086] [] btrfs_lookup_file_extent+0x3c/0x3e [btrfs] [ 2857.024099] [] ? btrfs_alloc_path+0x1a/0x2b [btrfs] [ 2857.024119] [] btrfs_drop_extents+0x10e/0x731 [btrfs] [ 2857.024127] [] ? need_resched+0x23/0x2d [ 2857.024134] [] ? _cond_resched+0xe/0x22 [ 2857.024140] [] ? slab_pre_alloc_hook.clone.33+0x2d/0x31 [ 2857.024146] [] ? kmem_cache_alloc+0x29/0xf7 [ 2857.024165] [] insert_reserved_file_extent.clone.34+0x70/0x1fc [btrfs] [ 2857.024187] [] ? lock_extent_bits+0x5e/0xa8 [btrfs] [ 2857.024206] [] btrfs_endio_direct_write+0x171/0x29a [btrfs] [ 2857.024225] [] ? end_workqueue_fn+0xf6/0x10e [btrfs] [ 2857.024232] [] bio_endio+0x2d/0x2f [ 2857.024248] [] end_workqueue_fn+0x101/0x10e [btrfs] [ 2857.024269] [] worker_loop+0x193/0x4ca [btrfs] [ 2857.024289] [] ? btrfs_queue_worker+0x214/0x214 [btrfs] [ 2857.024295] [] kthread+0x82/0x8a [ 2857.024301] [] kernel_thread_helper+0x4/0x10 [ 2857.024308] [] ? kthread_worker_fn+0x14b/0x14b [ 2857.024314] [] ? gs_change+0x13/0x13 [ 2857.024318] ---[ end trace 11fa90e2fd0455a6 ]--- [ 2857.024374] ------------[ cut here ]------------ [ 2857.024390] WARNING: at fs/btrfs/extent-tree.c:5648 btrfs_alloc_free_block+0x14e/0x357 [btrfs]() [ 2857.024395] Hardware name: XPS 8300 [ 2857.024398] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2857.024483] Pid: 8809, comm: btrfs-endio-wri Tainted: G W 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2857.024487] Call Trace: [ 2857.024494] [] warn_slowpath_common+0x85/0x9d [ 2857.024501] [] warn_slowpath_null+0x1a/0x1c [ 2857.024517] [] btrfs_alloc_free_block+0x14e/0x357 [btrfs] [ 2857.024538] [] ? merge_state+0xa6/0x11a [btrfs] [ 2857.024546] [] ? rb_insert_color+0xb8/0xe1 [ 2857.024559] [] __btrfs_cow_block+0x102/0x31e [btrfs] [ 2857.024579] [] ? unmap_extent_buffer+0xe/0x10 [btrfs] [ 2857.024592] [] ? unlock_up+0xd9/0xe4 [btrfs] [ 2857.024604] [] btrfs_cow_block+0x104/0x14e [btrfs] [ 2857.024617] [] push_leaf_right+0xc4/0x142 [btrfs] [ 2857.024635] [] ? map_extent_buffer+0x6c/0xa6 [btrfs] [ 2857.024649] [] split_leaf+0x84/0x53c [btrfs] [ 2857.024661] [] ? btrfs_item_offset_nr+0x19/0x1b [btrfs] [ 2857.024673] [] ? leaf_space_used+0x5e/0x86 [btrfs] [ 2857.024686] [] btrfs_search_slot+0x449/0x502 [btrfs] [ 2857.024700] [] btrfs_insert_empty_items+0x6a/0xba [btrfs] [ 2857.024707] [] ? kmem_cache_alloc+0x29/0xf7 [ 2857.024727] [] insert_reserved_file_extent.clone.34+0xad/0x1fc [btrfs] [ 2857.024747] [] ? lock_extent_bits+0x5e/0xa8 [btrfs] [ 2857.024767] [] btrfs_endio_direct_write+0x171/0x29a [btrfs] [ 2857.024785] [] ? end_workqueue_fn+0xf6/0x10e [btrfs] [ 2857.024792] [] bio_endio+0x2d/0x2f [ 2857.024808] [] end_workqueue_fn+0x101/0x10e [btrfs] [ 2857.024828] [] worker_loop+0x193/0x4ca [btrfs] [ 2857.024848] [] ? btrfs_queue_worker+0x214/0x214 [btrfs] [ 2857.024855] [] kthread+0x82/0x8a [ 2857.024861] [] kernel_thread_helper+0x4/0x10 [ 2857.024868] [] ? kthread_worker_fn+0x14b/0x14b [ 2857.024875] [] ? gs_change+0x13/0x13 [ 2857.024879] ---[ end trace 11fa90e2fd0455a7 ]--- [ 2857.024915] ------------[ cut here ]------------ [ 2857.024936] WARNING: at fs/btrfs/extent-tree.c:5648 btrfs_alloc_free_block+0x14e/0x357 [btrfs]() [ 2857.024941] Hardware name: XPS 8300 [ 2857.024944] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2857.025029] Pid: 8833, comm: btrfs-endio-wri Tainted: G W 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2857.025034] Call Trace: [ 2857.025043] [] warn_slowpath_common+0x85/0x9d [ 2857.025050] [] warn_slowpath_null+0x1a/0x1c [ 2857.025066] [] btrfs_alloc_free_block+0x14e/0x357 [btrfs] [ 2857.025080] [] __btrfs_cow_block+0x102/0x31e [btrfs] [ 2857.025093] [] ? unlock_up+0xd9/0xe4 [btrfs] [ 2857.025106] [] btrfs_cow_block+0x104/0x14e [btrfs] [ 2857.025120] [] btrfs_search_slot+0x162/0x502 [btrfs] [ 2857.025138] [] btrfs_lookup_file_extent+0x3c/0x3e [btrfs] [ 2857.025150] [] ? btrfs_alloc_path+0x1a/0x2b [btrfs] [ 2857.025172] [] btrfs_drop_extents+0x10e/0x731 [btrfs] [ 2857.025179] [] ? need_resched+0x23/0x2d [ 2857.025188] [] ? _cond_resched+0xe/0x22 [ 2857.025196] [] ? slab_pre_alloc_hook.clone.33+0x2d/0x31 [ 2857.025205] [] ? kmem_cache_alloc+0x29/0xf7 [ 2857.025231] [] insert_reserved_file_extent.clone.34+0x70/0x1fc [btrfs] [ 2857.025255] [] ? lock_extent_bits+0x5e/0xa8 [btrfs] [ 2857.025278] [] btrfs_endio_direct_write+0x171/0x29a [btrfs] [ 2857.025304] [] ? end_workqueue_fn+0xf6/0x10e [btrfs] [ 2857.025313] [] bio_endio+0x2d/0x2f [ 2857.025336] [] end_workqueue_fn+0x101/0x10e [btrfs] [ 2857.025366] [] worker_loop+0x193/0x4ca [btrfs] [ 2857.025387] [] ? btrfs_queue_worker+0x214/0x214 [btrfs] [ 2857.025393] [] kthread+0x82/0x8a [ 2857.025400] [] kernel_thread_helper+0x4/0x10 [ 2857.025406] [] ? kthread_worker_fn+0x14b/0x14b [ 2857.025413] [] ? gs_change+0x13/0x13 [ 2857.025417] ---[ end trace 11fa90e2fd0455a8 ]--- [ 2857.025527] ------------[ cut here ]------------ [ 2857.025544] WARNING: at fs/btrfs/extent-tree.c:5648 btrfs_alloc_free_block+0x14e/0x357 [btrfs]() [ 2857.025549] Hardware name: XPS 8300 [ 2857.025552] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2857.025633] Pid: 8833, comm: btrfs-endio-wri Tainted: G W 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2857.025638] Call Trace: [ 2857.025645] [] warn_slowpath_common+0x85/0x9d [ 2857.025653] [] warn_slowpath_null+0x1a/0x1c [ 2857.025668] [] btrfs_alloc_free_block+0x14e/0x357 [btrfs] [ 2857.025675] [] ? dequeue_task_fair+0x1ca/0x1d9 [ 2857.025688] [] __btrfs_cow_block+0x102/0x31e [btrfs] [ 2857.025700] [] ? unlock_up+0xd9/0xe4 [btrfs] [ 2857.025713] [] btrfs_cow_block+0x104/0x14e [btrfs] [ 2857.025734] [] ? btrfs_spin_on_block+0x55/0x55 [btrfs] [ 2857.025754] [] btrfs_search_slot+0x162/0x502 [btrfs] [ 2857.025763] [] ? slab_pre_alloc_hook.clone.33+0x2d/0x31 [ 2857.025788] [] btrfs_lookup_file_extent+0x3c/0x3e [btrfs] [ 2857.025803] [] ? btrfs_alloc_path+0x1a/0x2b [btrfs] [ 2857.025824] [] btrfs_drop_extents+0x10e/0x731 [btrfs] [ 2857.025830] [] ? need_resched+0x23/0x2d [ 2857.025836] [] ? _cond_resched+0xe/0x22 [ 2857.025842] [] ? slab_pre_alloc_hook.clone.33+0x2d/0x31 [ 2857.025848] [] ? kmem_cache_alloc+0x29/0xf7 [ 2857.025867] [] insert_reserved_file_extent.clone.34+0x70/0x1fc [btrfs] [ 2857.025889] [] ? lock_extent_bits+0x5e/0xa8 [btrfs] [ 2857.025909] [] btrfs_endio_direct_write+0x171/0x29a [btrfs] [ 2857.025926] [] ? end_workqueue_fn+0xf6/0x10e [btrfs] [ 2857.025933] [] bio_endio+0x2d/0x2f [ 2857.025949] [] end_workqueue_fn+0x101/0x10e [btrfs] [ 2857.025979] [] worker_loop+0x193/0x4ca [btrfs] [ 2857.026006] [] ? btrfs_queue_worker+0x214/0x214 [btrfs] [ 2857.026012] [] kthread+0x82/0x8a [ 2857.026018] [] kernel_thread_helper+0x4/0x10 [ 2857.026022] [] ? kthread_worker_fn+0x14b/0x14b [ 2857.026027] [] ? gs_change+0x13/0x13 [ 2857.026030] ---[ end trace 11fa90e2fd0455a9 ]--- [ 2857.026053] ------------[ cut here ]------------ [ 2857.026067] WARNING: at fs/btrfs/extent-tree.c:5648 btrfs_alloc_free_block+0x14e/0x357 [btrfs]() [ 2857.026070] Hardware name: XPS 8300 [ 2857.026072] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2857.026112] Pid: 8833, comm: btrfs-endio-wri Tainted: G W 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2857.026114] Call Trace: [ 2857.026119] [] warn_slowpath_common+0x85/0x9d [ 2857.026124] [] warn_slowpath_null+0x1a/0x1c [ 2857.026138] [] btrfs_alloc_free_block+0x14e/0x357 [btrfs] [ 2857.026156] [] ? map_private_extent_buffer+0xb1/0xd5 [btrfs] [ 2857.026167] [] __btrfs_cow_block+0x102/0x31e [btrfs] [ 2857.026178] [] ? unlock_up+0xd9/0xe4 [btrfs] [ 2857.026188] [] btrfs_cow_block+0x104/0x14e [btrfs] [ 2857.026199] [] btrfs_search_slot+0x162/0x502 [btrfs] [ 2857.026215] [] btrfs_lookup_file_extent+0x3c/0x3e [btrfs] [ 2857.026225] [] ? btrfs_alloc_path+0x1a/0x2b [btrfs] [ 2857.026243] [] btrfs_drop_extents+0x10e/0x731 [btrfs] [ 2857.026250] [] ? need_resched+0x23/0x2d [ 2857.026256] [] ? _cond_resched+0xe/0x22 [ 2857.026262] [] ? slab_pre_alloc_hook.clone.33+0x2d/0x31 [ 2857.026268] [] ? kmem_cache_alloc+0x29/0xf7 [ 2857.026287] [] insert_reserved_file_extent.clone.34+0x70/0x1fc [btrfs] [ 2857.026309] [] ? lock_extent_bits+0x5e/0xa8 [btrfs] [ 2857.026328] [] btrfs_endio_direct_write+0x171/0x29a [btrfs] [ 2857.026347] [] ? end_workqueue_fn+0xf6/0x10e [btrfs] [ 2857.026354] [] bio_endio+0x2d/0x2f [ 2857.026370] [] end_workqueue_fn+0x101/0x10e [btrfs] [ 2857.026390] [] worker_loop+0x193/0x4ca [btrfs] [ 2857.026410] [] ? btrfs_queue_worker+0x214/0x214 [btrfs] [ 2857.026415] [] kthread+0x82/0x8a [ 2857.026422] [] kernel_thread_helper+0x4/0x10 [ 2857.026428] [] ? kthread_worker_fn+0x14b/0x14b [ 2857.026444] [] ? gs_change+0x13/0x13 [ 2857.026448] ---[ end trace 11fa90e2fd0455aa ]--- [ 2857.026481] ------------[ cut here ]------------ [ 2857.026497] WARNING: at fs/btrfs/extent-tree.c:5648 btrfs_alloc_free_block+0x14e/0x357 [btrfs]() [ 2857.026502] Hardware name: XPS 8300 [ 2857.026505] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2857.026584] Pid: 8833, comm: btrfs-endio-wri Tainted: G W 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2857.026586] Call Trace: [ 2857.026589] [] warn_slowpath_common+0x85/0x9d [ 2857.026592] [] warn_slowpath_null+0x1a/0x1c [ 2857.026599] [] btrfs_alloc_free_block+0x14e/0x357 [btrfs] [ 2857.026608] [] ? map_private_extent_buffer+0xb1/0xd5 [btrfs] [ 2857.026614] [] __btrfs_cow_block+0x102/0x31e [btrfs] [ 2857.026620] [] ? unlock_up+0xd9/0xe4 [btrfs] [ 2857.026626] [] btrfs_cow_block+0x104/0x14e [btrfs] [ 2857.026632] [] btrfs_search_slot+0x162/0x502 [btrfs] [ 2857.026640] [] btrfs_lookup_file_extent+0x3c/0x3e [btrfs] [ 2857.026646] [] ? btrfs_alloc_path+0x1a/0x2b [btrfs] [ 2857.026655] [] btrfs_drop_extents+0x10e/0x731 [btrfs] [ 2857.026658] [] ? need_resched+0x23/0x2d [ 2857.026661] [] ? _cond_resched+0xe/0x22 [ 2857.026663] [] ? slab_pre_alloc_hook.clone.33+0x2d/0x31 [ 2857.026666] [] ? kmem_cache_alloc+0x29/0xf7 [ 2857.026674] [] insert_reserved_file_extent.clone.34+0x70/0x1fc [btrfs] [ 2857.026684] [] ? lock_extent_bits+0x5e/0xa8 [btrfs] [ 2857.026693] [] btrfs_endio_direct_write+0x171/0x29a [btrfs] [ 2857.026701] [] ? end_workqueue_fn+0xf6/0x10e [btrfs] [ 2857.026704] [] bio_endio+0x2d/0x2f [ 2857.026711] [] end_workqueue_fn+0x101/0x10e [btrfs] [ 2857.026721] [] worker_loop+0x193/0x4ca [btrfs] [ 2857.026730] [] ? btrfs_queue_worker+0x214/0x214 [btrfs] [ 2857.026732] [] kthread+0x82/0x8a [ 2857.026735] [] kernel_thread_helper+0x4/0x10 [ 2857.026738] [] ? kthread_worker_fn+0x14b/0x14b [ 2857.026741] [] ? gs_change+0x13/0x13 [ 2857.026742] ---[ end trace 11fa90e2fd0455ab ]--- [ 2863.924897] ------------[ cut here ]------------ [ 2863.924924] WARNING: at fs/btrfs/extent-tree.c:3832 btrfs_free_block_groups+0x13a/0x228 [btrfs]() [ 2863.924928] Hardware name: XPS 8300 [ 2863.924930] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2863.924977] Pid: 8875, comm: umount Tainted: G W 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2863.924980] Call Trace: [ 2863.924988] [] warn_slowpath_common+0x85/0x9d [ 2863.924994] [] warn_slowpath_null+0x1a/0x1c [ 2863.925009] [] btrfs_free_block_groups+0x13a/0x228 [btrfs] [ 2863.925026] [] close_ctree+0x22c/0x346 [btrfs] [ 2863.925031] [] ? should_resched+0xe/0x2e [ 2863.925036] [] ? _cond_resched+0xe/0x22 [ 2863.925040] [] ? down_write+0x29/0x49 [ 2863.925050] [] btrfs_put_super+0x1d/0x2c [btrfs] [ 2863.925056] [] generic_shutdown_super+0x74/0xe9 [ 2863.925060] [] kill_anon_super+0x16/0x50 [ 2863.925065] [] deactivate_locked_super+0x26/0x4b [ 2863.925069] [] deactivate_super+0x3a/0x3f [ 2863.925073] [] mntput_no_expire+0xd0/0xd5 [ 2863.925076] [] sys_umount+0x2dc/0x30a [ 2863.925081] [] ? path_put+0x22/0x27 [ 2863.925085] [] system_call_fastpath+0x16/0x1b [ 2863.925089] ---[ end trace 11fa90e2fd0455ac ]--- [ 2863.925091] ------------[ cut here ]------------ [ 2863.925104] WARNING: at fs/btrfs/extent-tree.c:3833 btrfs_free_block_groups+0x155/0x228 [btrfs]() [ 2863.925107] Hardware name: XPS 8300 [ 2863.925109] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2863.925147] Pid: 8875, comm: umount Tainted: G W 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2863.925150] Call Trace: [ 2863.925154] [] warn_slowpath_common+0x85/0x9d [ 2863.925159] [] warn_slowpath_null+0x1a/0x1c [ 2863.925172] [] btrfs_free_block_groups+0x155/0x228 [btrfs] [ 2863.925188] [] close_ctree+0x22c/0x346 [btrfs] [ 2863.925193] [] ? should_resched+0xe/0x2e [ 2863.925196] [] ? _cond_resched+0xe/0x22 [ 2863.925200] [] ? down_write+0x29/0x49 [ 2863.925209] [] btrfs_put_super+0x1d/0x2c [btrfs] [ 2863.925214] [] generic_shutdown_super+0x74/0xe9 [ 2863.925218] [] kill_anon_super+0x16/0x50 [ 2863.925223] [] deactivate_locked_super+0x26/0x4b [ 2863.925227] [] deactivate_super+0x3a/0x3f [ 2863.925231] [] mntput_no_expire+0xd0/0xd5 [ 2863.925234] [] sys_umount+0x2dc/0x30a [ 2863.925238] [] ? path_put+0x22/0x27 [ 2863.925242] [] system_call_fastpath+0x16/0x1b [ 2863.925245] ---[ end trace 11fa90e2fd0455ad ]--- [ 2863.925248] ------------[ cut here ]------------ [ 2863.925261] WARNING: at fs/btrfs/extent-tree.c:6846 btrfs_free_block_groups+0x1e6/0x228 [btrfs]() [ 2863.925263] Hardware name: XPS 8300 [ 2863.925265] Modules linked in: tun btrfs zlib_deflate libcrc32c brd fuse cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device broadcom snd_pcm snd_timer snd tg3 iTCO_wdt serio_raw dcdbas iTCO_vendor_support microcode soundcore pcspkr snd_page_alloc i2c_i801 joydev usb_storage i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] [ 2863.925303] Pid: 8875, comm: umount Tainted: G W 3.0.0-rc1-work-2011-06-01-01+ #11 [ 2863.925305] Call Trace: [ 2863.925310] [] warn_slowpath_common+0x85/0x9d [ 2863.925323] [] ? btrfs_free_block_groups+0x204/0x228 [btrfs] [ 2863.925328] [] warn_slowpath_null+0x1a/0x1c [ 2863.925341] [] btrfs_free_block_groups+0x1e6/0x228 [btrfs] [ 2863.925356] [] close_ctree+0x22c/0x346 [btrfs] [ 2863.925360] [] ? should_resched+0xe/0x2e [ 2863.925364] [] ? _cond_resched+0xe/0x22 [ 2863.925368] [] ? down_write+0x29/0x49 [ 2863.925377] [] btrfs_put_super+0x1d/0x2c [btrfs] [ 2863.925382] [] generic_shutdown_super+0x74/0xe9 [ 2863.925386] [] kill_anon_super+0x16/0x50 [ 2863.925391] [] deactivate_locked_super+0x26/0x4b [ 2863.925395] [] deactivate_super+0x3a/0x3f [ 2863.925398] [] mntput_no_expire+0xd0/0xd5 [ 2863.925402] [] sys_umount+0x2dc/0x30a [ 2863.925406] [] ? path_put+0x22/0x27 [ 2863.925410] [] system_call_fastpath+0x16/0x1b [ 2863.925413] ---[ end trace 11fa90e2fd0455ae ]--- [ 2863.925416] space_info has 13627392 free, is full [ 2863.925419] space_info total=41943040, used=19832832, pinned=0, reserved=28672, may_use=0, readonly=8454144 Some btrfs complaints --------------------- [ 3704.817050] btrfs no csum found for inode 17005 start 1302528 [ 3704.817058] btrfs no csum found for inode 17005 start 1306624 [ 3704.817064] btrfs no csum found for inode 17005 start 1310720 [ 3704.817089] btrfs no csum found for inode 17005 start 1314816 [ 3704.817094] btrfs no csum found for inode 17005 start 1318912 [ 3704.817100] btrfs no csum found for inode 17005 start 1323008 [ 3704.817105] btrfs no csum found for inode 17005 start 1327104 [ 3704.817111] btrfs no csum found for inode 17005 start 1331200 [ 3704.817117] btrfs no csum found for inode 17005 start 1335296 [ 3704.817122] btrfs no csum found for inode 17005 start 1339392 [ 3704.817128] btrfs no csum found for inode 17005 start 1343488 [ 3704.817133] btrfs no csum found for inode 17005 start 1347584 [ 3704.817139] btrfs no csum found for inode 17005 start 1351680 [ 3704.817309] btrfs csum failed ino 17005 off 1302528 csum 451097791 private 0 [ 3704.817350] btrfs csum failed ino 17005 off 1306624 csum 451097791 private 0 [ 3704.817377] btrfs csum failed ino 17005 off 1310720 csum 451097791 private 0 [ 3704.817420] btrfs csum failed ino 17005 off 1314816 csum 978321154 private 0 [ 3704.817446] btrfs csum failed ino 17005 off 1318912 csum 2566472073 private 0 [ 3704.817472] btrfs csum failed ino 17005 off 1323008 csum 2566472073 private 0 [ 3704.817497] btrfs csum failed ino 17005 off 1327104 csum 2566472073 private 0 [ 3704.817523] btrfs csum failed ino 17005 off 1331200 csum 2566472073 private 0 [ 3704.817549] btrfs csum failed ino 17005 off 1335296 csum 2566472073 private 0 [ 3704.817575] btrfs csum failed ino 17005 off 1339392 csum 2566472073 private 0 [ 3704.817601] btrfs csum failed ino 17005 off 1343488 csum 2566472073 private 0 [ 3704.817627] btrfs csum failed ino 17005 off 1347584 csum 2566472073 private 0 [ 3704.817654] btrfs csum failed ino 17005 off 1351680 csum 2779917954 private 0 Hang ---- [152684.675833] btrfs-transacti D ffff880184e18bd0 0 22322 2 0x00000080 [152684.675835] ffff88017c26dd60 0000000000000046 0000000000000000 ffff880100000001 [152684.675838] 0000000000012540 0000000000012540 0000000000012540 ffff8801a2524560 [152684.675840] 0000000000012540 ffff88017c26dfd8 0000000000012540 0000000000012540 [152684.675842] Call Trace: [152684.675844] [] ? prepare_to_wait+0x6c/0x79 [152684.675856] [] wait_for_commit.clone.14+0x90/0xd5 [btrfs] [152684.675858] [] ? wake_up_bit+0x2a/0x2a [152684.675866] [] btrfs_commit_transaction+0x102/0x694 [btrfs] [152684.675874] [] ? join_transaction.clone.20+0x17b/0x186 [btrfs] [152684.675876] [] ? wake_up_bit+0x2a/0x2a [152684.675882] [] transaction_kthread+0x17a/0x22f [btrfs] [152684.675889] [] ? btrfs_congested_fn+0x86/0x86 [btrfs] [152684.675891] [] kthread+0x82/0x8a [152684.675893] [] kernel_thread_helper+0x4/0x10 [152684.675895] [] ? kthread_worker_fn+0x14b/0x14b [152684.675897] [] ? gs_change+0x13/0x13 [152684.675898] flush-btrfs-770 D 00000001091bba6c 0 22331 2 0x00000080 [152684.675900] ffff88017c19bb10 0000000000000046 ffff88017c19ba70 ffff880100000000 [152684.675902] 0000000000012540 0000000000012540 0000000000012540 ffff8801a2525c80 [152684.675905] 0000000000012540 ffff88017c19bfd8 0000000000012540 0000000000012540 [152684.675907] Call Trace: [152684.675909] [] schedule_timeout+0x36/0xe3 [152684.675912] [] ? arch_local_irq_save+0x18/0x1e [152684.675914] [] ? _raw_spin_unlock_irqrestore+0x17/0x19 [152684.675916] [] ? prepare_to_wait+0x6c/0x79 [152684.675923] [] btrfs_commit_transaction+0x2c3/0x694 [btrfs] [152684.675924] [] ? wake_up_bit+0x2a/0x2a [152684.675933] [] btrfs_write_inode+0xa0/0xa9 [btrfs] [152684.675935] [] writeback_single_inode+0x125/0x1bf [152684.675937] [] writeback_sb_inodes+0xce/0x160 [152684.675939] [] wb_writeback+0x258/0x3aa [152684.675942] [] wb_do_writeback+0x89/0x1a1 [152684.675944] [] ? run_timer_softirq+0x29a/0x29a [152684.675946] [] bdi_writeback_thread+0x8c/0x20f [152684.675948] [] ? wb_do_writeback+0x1a1/0x1a1 [152684.675950] [] kthread+0x82/0x8a [152684.675952] [] kernel_thread_helper+0x4/0x10 [152684.675954] [] ? kthread_worker_fn+0x14b/0x14b [152684.675956] [] ? gs_change+0x13/0x13 [152684.675957] fsstress D 0000000100363ef6 0 22334 1 0x00000084 [152684.675959] ffff880169f8bb98 0000000000000082 0000000000000000 0000000000000000 [152684.675961] 0000000000012540 0000000000012540 0000000000012540 ffff880181f21720 [152684.675963] 0000000000012540 ffff880169f8bfd8 0000000000012540 0000000000012540 [152684.675966] Call Trace: [152684.675967] [] ? prepare_to_wait+0x6c/0x79 [152684.675974] [] wait_current_trans.clone.19+0xa0/0xd4 [btrfs] [152684.675976] [] ? wake_up_bit+0x2a/0x2a [152684.675977] [] ? mutex_lock+0x29/0x4a [152684.675984] [] start_transaction+0x98/0x24f [btrfs] [152684.675991] [] btrfs_start_transaction+0x13/0x15 [btrfs] [152684.675999] [] btrfs_create+0x3a/0x1de [btrfs] [152684.676002] [] vfs_create+0x70/0x92 [152684.676004] [] do_last+0x228/0x599 [152684.676006] [] path_openat+0xc8/0x34d [152684.676007] [] ? putname+0x34/0x36 [152684.676009] [] do_filp_open+0x3d/0x89 [152684.676012] [] ? alloc_fd+0x74/0x11f [152684.676014] [] do_sys_open+0x74/0x106 [152684.676015] [] sys_open+0x20/0x22 [152684.676017] [] sys_creat+0x15/0x17 [152684.676019] [] system_call_fastpath+0x16/0x1b [152684.676020] fsstress D 0000000100363ef5 0 22335 1 0x00000084 [152684.676022] ffff8801665018e8 0000000000000082 ffffffff81144cd4 00000000000000c0 [152684.676024] 0000000000012540 0000000000012540 0000000000012540 ffff880181f22e40 [152684.676027] 0000000000012540 ffff880166501fd8 0000000000012540 0000000000012540 [152684.676029] Call Trace: [152684.676031] [] ? bvec_alloc_bs+0xb0/0xcf [152684.676033] [] schedule_timeout+0x36/0xe3 [152684.676041] [] ? __btrfs_map_block+0x5f1/0x609 [btrfs] [152684.676043] [] ? arch_local_irq_save+0x18/0x1e [152684.676045] [] ? need_resched+0x23/0x2d [152684.676047] [] wait_for_common+0xad/0x102 [152684.676049] [] ? try_to_wake_up+0x1aa/0x1aa [152684.676051] [] ? local_bh_enable_ip+0xe/0x10 [152684.676053] [] wait_for_completion+0x1d/0x1f [152684.676055] [] writeback_inodes_sb_nr+0x76/0x7d [152684.676057] [] writeback_inodes_sb_nr_if_idle+0x41/0x57 [152684.676062] [] shrink_delalloc.clone.46+0xb2/0x155 [btrfs] [152684.676068] [] reserve_metadata_bytes.clone.47+0xf9/0x1b3 [btrfs] [152684.676074] [] btrfs_block_rsv_add+0x2c/0x4f [btrfs] [152684.676080] [] btrfs_trans_reserve_metadata+0x4f/0x74 [btrfs] [152684.676087] [] start_transaction+0x190/0x24f [btrfs] [152684.676094] [] btrfs_start_transaction+0x13/0x15 [btrfs] [152684.676102] [] btrfs_create+0x3a/0x1de [btrfs] [152684.676104] [] vfs_create+0x70/0x92 [152684.676106] [] do_last+0x228/0x599 [152684.676107] [] path_openat+0xc8/0x34d [152684.676109] [] ? _raw_spin_unlock_irqrestore+0x17/0x19 [152684.676111] [] ? _raw_spin_lock+0xe/0x10 [152684.676113] [] do_filp_open+0x3d/0x89 [152684.676115] [] ? alloc_fd+0x74/0x11f [152684.676117] [] do_sys_open+0x74/0x106 [152684.676119] [] sys_open+0x20/0x22 [152684.676120] [] sys_creat+0x15/0x17 [152684.676122] [] system_call_fastpath+0x16/0x1b [152684.676123] fsstress D 0000000100363ef5 0 22336 1 0x00000084 [152684.676125] ffff88017ba37d48 0000000000000086 ffff88017ba37cb8 ffffffff812262b8 [152684.676127] 0000000000012540 0000000000012540 0000000000012540 ffff880181b01720 [152684.676130] 0000000000012540 ffff88017ba37fd8 0000000000012540 0000000000012540 [152684.676132] Call Trace: [152684.676134] [] ? cpumask_next_and+0x2c/0x39 [152684.676136] [] schedule_timeout+0x36/0xe3 [152684.676138] [] ? flat_send_IPI_mask+0x11/0x13 [152684.676140] [] ? need_resched+0x23/0x2d [152684.676142] [] wait_for_common+0xad/0x102 [152684.676143] [] ? try_to_wake_up+0x1aa/0x1aa [152684.676145] [] ? local_bh_enable_ip+0xe/0x10 [152684.676147] [] ? __sync_filesystem+0x7a/0x7a [152684.676148] [] wait_for_completion+0x1d/0x1f [152684.676150] [] sync_inodes_sb+0x91/0x17d [152684.676152] [] ? __sync_filesystem+0x7a/0x7a [152684.676154] [] __sync_filesystem+0x47/0x7a [152684.676155] [] sync_one_sb+0x16/0x18 [152684.676157] [] iterate_supers+0x6d/0xbe [152684.676159] [] sync_filesystems+0x20/0x22 [152684.676160] [] sys_sync+0x21/0x33 [152684.676162] [] system_call_fastpath+0x16/0x1b [152684.676164] updatedb D 0000000102716c7c 0 25199 25193 0x00000080 [152684.676166] ffff88017fb01e28 0000000000000086 ffff88017fb01f28 ffff880100000000 [152684.676168] 0000000000012540 0000000000012540 0000000000012540 ffff88019ee0ae40 [152684.676170] 0000000000012540 ffff88017fb01fd8 0000000000012540 0000000000012540 [152684.676172] Call Trace: [152684.676174] [] __mutex_lock_common.clone.5+0x11b/0x17c [152684.676177] [] ? filldir64+0xd5/0xd5 [152684.676178] [] __mutex_lock_killable_slowpath+0x13/0x15 [152684.676181] [] __mutex_fastpath_lock_retval+0x18/0x1a [152684.676182] [] mutex_lock_killable+0x38/0x4d [152684.676184] [] vfs_readdir+0x56/0xac [152684.676186] [] sys_getdents+0x81/0xd1 [152684.676188] [] system_call_fastpath+0x16/0x1b [152684.676191] sync D 00000001091bba63 0 26977 1943 0x00000080 [152684.676193] ffff880183239d48 0000000000000086 0007ffffffffffff ffff880100000000 [152684.676196] 0000000000012540 0000000000012540 0000000000012540 ffff880181b04560 [152684.676198] 0000000000012540 ffff880183239fd8 0000000000012540 0000000000012540 [152684.676200] Call Trace: [152684.676202] [] schedule_timeout+0x36/0xe3 [152684.676203] [] ? flat_send_IPI_mask+0x11/0x13 [152684.676205] [] ? need_resched+0x23/0x2d [152684.676207] [] wait_for_common+0xad/0x102 [152684.676209] [] ? try_to_wake_up+0x1aa/0x1aa [152684.676210] [] ? local_bh_enable_ip+0xe/0x10 [152684.676212] [] ? __sync_filesystem+0x7a/0x7a [152684.676214] [] wait_for_completion+0x1d/0x1f [152684.676216] [] writeback_inodes_sb_nr+0x76/0x7d [152684.676218] [] writeback_inodes_sb+0x22/0x24 [152684.676219] [] __sync_filesystem+0x51/0x7a [152684.676221] [] sync_one_sb+0x16/0x18 [152684.676223] [] iterate_supers+0x6d/0xbe [152684.676224] [] sync_filesystems+0x20/0x22 [152684.676226] [] sys_sync+0x17/0x33 [152684.676227] [] system_call_fastpath+0x16/0x1b