https://bugzilla.kernel.org/show_bug.cgi?id=19502 Summary: 'losetup -c' on a mounted loopN device with ext[34] causes soft lockup Product: File System Version: 2.5 Kernel Version: 2.6.35.6, 2.6.35.7 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext3 AssignedTo: fs_ext3@xxxxxxxxxxxxxxxxxxxx ReportedBy: sliedes@xxxxxxxxx Regression: No (This log is from qemu, but I have reproduced this on real x86-64 hardware too) *** Steps to reproduce *** 1. mkdir test 2. mount none test -t tmpfs 3. cd test 4. dd if=/dev/zero bs=1M count=128 >img 5. mkfs.ext3 img # OR ext4 6. mount img /media/ -o loop 7. cp ../.bashrc /media/ 7b. OPTIONAL (here not done): dd if=/dev/zero bs=1M count=128 >>img 8. losetup -c /dev/loop0 *** Expected result *** System remains functional, with the ext3 filesystem still functional on /dev/loop0. *** Actual result *** After a few seconds, a soft lockup happens; after 60 seconds, a backtrace is dumped. *** Comments*** Doing losetup -c made sense to me with step 7b, since it seemed the way to extend the device in preparation for running resize2fs /dev/loop0. So if I for example wanted to extend the filesystem from 128 MiB to 256 MiB, I'd run step 7b and then losetup -c /dev/loop0. I see this as analogous to extending lvm logical volumes (which seems to work with ext3 and ext4). After this I would run resize2fs /dev/loop0 to resize the filesystem. This lockup happens with both ext3 and ext4, and whether the image file is on tmpfs or on an ext3 filesystem. As said, it also happens whether the image file was extended or not. *** Backtrace for ext3 *** BUG: soft lockup - CPU#0 stuck for 61s! [kjournald:1098] irq event stamp: 68314 hardirqs last enabled at (68313): [<ffffffff815ce3ce>] restore_args+0x0/0x30 hardirqs last disabled at (68314): [<ffffffff810022f8>] save_args+0x68/0x70 softirqs last enabled at (68310): [<ffffffff81037477>] __do_softirq+0xe7/0x130 softirqs last disabled at (68305): [<ffffffff810031da>] call_softirq+0x1a/0x30 CPU 0 Pid: 1098, comm: kjournald Not tainted 2.6.35.7 #1 /Bochs RIP: 0010:[<ffffffff81081812>] [<ffffffff81081812>] find_lock_page+0x62/0x80 RSP: 0000:ffff88003e52dc38 EFLAGS: 00000246 RAX: ffffea0000d9a870 RBX: ffff88003e52dc80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 000000000000013d RDI: ffffffff817a90ec RBP: ffffffff81002e0e R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88003f8746d8 R12: ffff88003f424e78 R13: 0000000000003043 R14: 0000000000000000 R15: 0000000000000246 FS: 0000000000000000(0000) GS:ffffffff81a1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000009c51008 CR3: 000000003eb53000 CR4: 00000000000006b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process kjournald (pid: 1098, threadinfo ffff88003e52c000, task ffff88003f874000) Stack: ffffffff81081dca 0000000000000010 0000005000000246 ffffea0000d9a870 <0> 0000000000000000 0000000000000400 ffff88003f424b00 ffff88003f424c90 <0> 000000000000c10c ffff88003e52dce0 ffffffff810d753e ffff88003e52dcb0 Call Trace: [<ffffffff81081dca>] ? find_or_create_page+0x3a/0xb0 [<ffffffff810d753e>] ? __getblk+0xee/0x2f0 [<ffffffff811ad325>] ? journal_get_descriptor_buffer+0x45/0xb0 [<ffffffff811a82fe>] ? journal_commit_transaction+0x109e/0x17a0 [<ffffffff815ce15b>] ? _raw_spin_unlock_irqrestore+0x3b/0x70 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff811ac5a9>] ? kjournald+0x109/0x3e0 [<ffffffff81049a50>] ? autoremove_wake_function+0x0/0x40 [<ffffffff811ac4a0>] ? kjournald+0x0/0x3e0 [<ffffffff8104964e>] ? kthread+0x9e/0xb0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff810030e4>] ? kernel_thread_helper+0x4/0x10 [<ffffffff815ce3ce>] ? restore_args+0x0/0x30 [<ffffffff810495b0>] ? kthread+0x0/0xb0 [<ffffffff810030e0>] ? kernel_thread_helper+0x0/0x10 Code: ec 90 7a 81 e8 f0 7e fa ff 41 0f ba 6d 00 00 19 c0 85 c0 75 17 49 3b 5d 18 75 1b 4c 89 e8 48 8b 5d e8 4c 8b 65 f0 4c 8b 6d f8 c9 <c3> 4c 89 ef e8 e5 e6 ff ff eb df 4c 89 ef e8 2b e8 ff ff 4c 89 Call Trace: [<ffffffff81081dca>] ? find_or_create_page+0x3a/0xb0 [<ffffffff810d753e>] ? __getblk+0xee/0x2f0 [<ffffffff811ad325>] ? journal_get_descriptor_buffer+0x45/0xb0 [<ffffffff811a82fe>] ? journal_commit_transaction+0x109e/0x17a0 [<ffffffff815ce15b>] ? _raw_spin_unlock_irqrestore+0x3b/0x70 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff811ac5a9>] ? kjournald+0x109/0x3e0 [<ffffffff81049a50>] ? autoremove_wake_function+0x0/0x40 [<ffffffff811ac4a0>] ? kjournald+0x0/0x3e0 [<ffffffff8104964e>] ? kthread+0x9e/0xb0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff810030e4>] ? kernel_thread_helper+0x4/0x10 [<ffffffff815ce3ce>] ? restore_args+0x0/0x30 [<ffffffff810495b0>] ? kthread+0x0/0xb0 [<ffffffff810030e0>] ? kernel_thread_helper+0x0/0x10 *** Backtrace for ext4 *** BUG: soft lockup - CPU#0 stuck for 61s! [flush-7:0:954] irq event stamp: 112246 hardirqs last enabled at (112245): [<ffffffff815b614e>] restore_args+0x0/0x30 hardirqs last disabled at (112246): [<ffffffff810022f8>] save_args+0x68/0x70 softirqs last enabled at (112244): [<ffffffff81037477>] __do_softirq+0xe7/0x130 softirqs last disabled at (112231): [<ffffffff810031da>] call_softirq+0x1a/0x30 CPU 0 Pid: 954, comm: flush-7:0 Not tainted 2.6.35.6 #2 /Bochs RIP: 0010:[<ffffffff8105d5a5>] [<ffffffff8105d5a5>] lock_acquire+0x75/0x90 RSP: 0000:ffff88003e4434d0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88003e443500 RCX: ffff88003fa9d0c8 RDX: ffff88003fa9d798 RSI: ffff88003fa9d7b8 RDI: 0000000000000246 RBP: ffffffff81002e0e R08: 0000000000000036 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88003fa9d7a0 R12: 0000000000000036 R13: 0000000000000000 R14: 0000000000000001 R15: ffff88003fa9d7a0 FS: 0000000000000000(0000) GS:ffffffff81a1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00000000f775a368 CR3: 000000003ead1000 CR4: 00000000000006b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process flush-7:0 (pid: 954, threadinfo ffff88003e442000, task ffff88003fa9d000) Stack: 0000000000000000 ffffffff8107fd60 ffffffff00000000 ffffea0000df44c0 <0> 0000000000000040 ffff88003f424e78 ffff88003e443540 ffffffff8107fda4 <0> ffffffff8107fd60 ffffffff810d6ef1 0000000000000103 ffff88003f424e70 Call Trace: [<ffffffff8107fd60>] ? find_get_page+0x0/0xc0 [<ffffffff8107fda4>] ? find_get_page+0x44/0xc0 [<ffffffff8107fd60>] ? find_get_page+0x0/0xc0 [<ffffffff810d6ef1>] ? __find_get_block_slow+0x41/0x110 [<ffffffff810817d5>] ? find_lock_page+0x25/0x80 [<ffffffff81081dca>] ? find_or_create_page+0x3a/0xb0 [<ffffffff810d753e>] ? __getblk+0xee/0x2f0 [<ffffffff8119a7a2>] ? ext4_mb_init_cache+0x122/0xa30 [<ffffffff8108027f>] ? add_to_page_cache_locked+0xbf/0x100 [<ffffffff8119b18f>] ? ext4_mb_init_group+0xdf/0x2b0 [<ffffffff8119b42c>] ? ext4_mb_good_group+0xcc/0x110 [<ffffffff8119e611>] ? ext4_mb_regular_allocator+0x191/0x3e0 [<ffffffff81198026>] ? ext4_mb_use_preallocated+0xf6/0x2c0 [<ffffffff81197f60>] ? ext4_mb_use_preallocated+0x30/0x2c0 [<ffffffff8105b8cd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8119eb3b>] ? ext4_mb_new_blocks+0x2db/0x3f0 [<ffffffff81191d84>] ? ext4_ext_find_extent+0x2c4/0x320 [<ffffffff8119453b>] ? ext4_ext_map_blocks+0x4bb/0x1aa0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff8117d78b>] ? ext4_map_blocks+0xab/0x200 [<ffffffff8117d7c1>] ? ext4_map_blocks+0xe1/0x200 [<ffffffff8117eb27>] ? mpage_da_map_blocks+0xc7/0x420 [<ffffffff8118ace0>] ? ext4_journal_start_sb+0xf0/0x120 [<ffffffff8117f668>] ? ext4_da_writepages+0x2b8/0x560 [<ffffffff810d122b>] ? writeback_inodes_wb+0xdb/0x1a0 [<ffffffff8108821f>] ? do_writepages+0x1f/0x40 [<ffffffff810d0024>] ? writeback_single_inode+0xe4/0x3d0 [<ffffffff810d0809>] ? writeback_sb_inodes+0x199/0x2a0 [<ffffffff810d11bb>] ? writeback_inodes_wb+0x6b/0x1a0 [<ffffffff8102ad60>] ? T.944+0x0/0xd0 [<ffffffff810d151b>] ? wb_writeback+0x22b/0x290 [<ffffffff810d16ee>] ? wb_do_writeback+0x16e/0x180 [<ffffffff810d174b>] ? bdi_writeback_task+0x4b/0x140 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff810933d0>] ? bdi_start_fn+0x80/0xf0 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff8104964e>] ? kthread+0x9e/0xb0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff810030e4>] ? kernel_thread_helper+0x4/0x10 [<ffffffff815b614e>] ? restore_args+0x0/0x30 [<ffffffff810495b0>] ? kthread+0x0/0xb0 [<ffffffff810030e0>] ? kernel_thread_helper+0x0/0x10 Code: 44 24 10 00 00 00 00 48 83 f0 01 4c 89 54 24 08 41 89 c1 41 83 e1 01 e8 ca e5 ff ff c7 83 d4 06 00 00 00 00 00 00 4c 89 e7 57 9d <0f> 1f 44 00 00 48 83 c4 20 5b 41 5c c9 c3 66 66 66 66 2e 0f 1f Call Trace: [<ffffffff8107fd60>] ? find_get_page+0x0/0xc0 [<ffffffff8107fda4>] ? find_get_page+0x44/0xc0 [<ffffffff8107fd60>] ? find_get_page+0x0/0xc0 [<ffffffff810d6ef1>] ? __find_get_block_slow+0x41/0x110 [<ffffffff810817d5>] ? find_lock_page+0x25/0x80 [<ffffffff81081dca>] ? find_or_create_page+0x3a/0xb0 [<ffffffff810d753e>] ? __getblk+0xee/0x2f0 [<ffffffff8119a7a2>] ? ext4_mb_init_cache+0x122/0xa30 [<ffffffff8108027f>] ? add_to_page_cache_locked+0xbf/0x100 [<ffffffff8119b18f>] ? ext4_mb_init_group+0xdf/0x2b0 [<ffffffff8119b42c>] ? ext4_mb_good_group+0xcc/0x110 [<ffffffff8119e611>] ? ext4_mb_regular_allocator+0x191/0x3e0 [<ffffffff81198026>] ? ext4_mb_use_preallocated+0xf6/0x2c0 [<ffffffff81197f60>] ? ext4_mb_use_preallocated+0x30/0x2c0 [<ffffffff8105b8cd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8119eb3b>] ? ext4_mb_new_blocks+0x2db/0x3f0 [<ffffffff81191d84>] ? ext4_ext_find_extent+0x2c4/0x320 [<ffffffff8119453b>] ? ext4_ext_map_blocks+0x4bb/0x1aa0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff8117d78b>] ? ext4_map_blocks+0xab/0x200 [<ffffffff8117d7c1>] ? ext4_map_blocks+0xe1/0x200 [<ffffffff8117eb27>] ? mpage_da_map_blocks+0xc7/0x420 [<ffffffff8118ace0>] ? ext4_journal_start_sb+0xf0/0x120 [<ffffffff8117f668>] ? ext4_da_writepages+0x2b8/0x560 [<ffffffff810d122b>] ? writeback_inodes_wb+0xdb/0x1a0 [<ffffffff8108821f>] ? do_writepages+0x1f/0x40 [<ffffffff810d0024>] ? writeback_single_inode+0xe4/0x3d0 [<ffffffff810d0809>] ? writeback_sb_inodes+0x199/0x2a0 [<ffffffff810d11bb>] ? writeback_inodes_wb+0x6b/0x1a0 [<ffffffff8102ad60>] ? T.944+0x0/0xd0 [<ffffffff810d151b>] ? wb_writeback+0x22b/0x290 [<ffffffff810d16ee>] ? wb_do_writeback+0x16e/0x180 [<ffffffff810d174b>] ? bdi_writeback_task+0x4b/0x140 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff810933d0>] ? bdi_start_fn+0x80/0xf0 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff8104964e>] ? kthread+0x9e/0xb0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff810030e4>] ? kernel_thread_helper+0x4/0x10 [<ffffffff815b614e>] ? restore_args+0x0/0x30 [<ffffffff810495b0>] ? kthread+0x0/0xb0 [<ffffffff810030e0>] ? kernel_thread_helper+0x0/0x10 BUG: soft lockup - CPU#0 stuck for 61s! [flush-7:0:954] irq event stamp: 218554 hardirqs last enabled at (218553): [<ffffffff815b614e>] restore_args+0x0/0x30 hardirqs last disabled at (218554): [<ffffffff810022f8>] save_args+0x68/0x70 softirqs last enabled at (218552): [<ffffffff81037477>] __do_softirq+0xe7/0x130 softirqs last disabled at (218539): [<ffffffff810031da>] call_softirq+0x1a/0x30 CPU 0 Pid: 954, comm: flush-7:0 Not tainted 2.6.35.6 #2 /Bochs RIP: 0010:[<ffffffff8105d91e>] [<ffffffff8105d91e>] lock_release+0x3e/0x1b0 RSP: 0000:ffff88003e4434c8 EFLAGS: 00000246 RAX: ffff88003f59c478 RBX: ffff88003e443500 RCX: 0000000000000000 RDX: ffffffff8107fdd2 RSI: 0000000000000001 RDI: ffffffff81a28c30 RBP: ffffffff81002e0e R08: 0000000000000036 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88003fa9d7a0 R12: ffffffff815b5542 R13: ffff88003e443500 R14: ffff88003f424e78 R15: 0000000000000040 FS: 0000000000000000(0000) GS:ffffffff81a1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00000000f775a368 CR3: 000000003ead1000 CR4: 00000000000006b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process flush-7:0 (pid: 954, threadinfo ffff88003e442000, task ffff88003fa9d000) Stack: 0000000000000246 0000000000000000 0000000000000040 ffff88003f424e78 <0> ffffea0000df44c0 ffff88003f424e70 0000000000000103 ffff88003e443540 <0> ffffffff8107fdea ffffffff8107fd60 ffffffff810d6ef1 0000000000000001 Call Trace: [<ffffffff8107fdea>] ? find_get_page+0x8a/0xc0 [<ffffffff8107fd60>] ? find_get_page+0x0/0xc0 [<ffffffff810d6ef1>] ? __find_get_block_slow+0x41/0x110 [<ffffffff810817d5>] ? find_lock_page+0x25/0x80 [<ffffffff81081dca>] ? find_or_create_page+0x3a/0xb0 [<ffffffff810d753e>] ? __getblk+0xee/0x2f0 [<ffffffff8119a7a2>] ? ext4_mb_init_cache+0x122/0xa30 [<ffffffff8108027f>] ? add_to_page_cache_locked+0xbf/0x100 [<ffffffff8119b18f>] ? ext4_mb_init_group+0xdf/0x2b0 [<ffffffff8119b42c>] ? ext4_mb_good_group+0xcc/0x110 [<ffffffff8119e611>] ? ext4_mb_regular_allocator+0x191/0x3e0 [<ffffffff81198026>] ? ext4_mb_use_preallocated+0xf6/0x2c0 [<ffffffff81197f60>] ? ext4_mb_use_preallocated+0x30/0x2c0 [<ffffffff8105b8cd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8119eb3b>] ? ext4_mb_new_blocks+0x2db/0x3f0 [<ffffffff81191d84>] ? ext4_ext_find_extent+0x2c4/0x320 [<ffffffff8119453b>] ? ext4_ext_map_blocks+0x4bb/0x1aa0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff8117d78b>] ? ext4_map_blocks+0xab/0x200 [<ffffffff8117d7c1>] ? ext4_map_blocks+0xe1/0x200 [<ffffffff8117eb27>] ? mpage_da_map_blocks+0xc7/0x420 [<ffffffff8118ace0>] ? ext4_journal_start_sb+0xf0/0x120 [<ffffffff8117f668>] ? ext4_da_writepages+0x2b8/0x560 [<ffffffff810d122b>] ? writeback_inodes_wb+0xdb/0x1a0 [<ffffffff8108821f>] ? do_writepages+0x1f/0x40 [<ffffffff810d0024>] ? writeback_single_inode+0xe4/0x3d0 [<ffffffff810d0809>] ? writeback_sb_inodes+0x199/0x2a0 [<ffffffff810d11bb>] ? writeback_inodes_wb+0x6b/0x1a0 [<ffffffff8102ad60>] ? T.944+0x0/0xd0 [<ffffffff810d151b>] ? wb_writeback+0x22b/0x290 [<ffffffff810d16ee>] ? wb_do_writeback+0x16e/0x180 [<ffffffff810d174b>] ? bdi_writeback_task+0x4b/0x140 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff810933d0>] ? bdi_start_fn+0x80/0xf0 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff8104964e>] ? kthread+0x9e/0xb0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff810030e4>] ? kernel_thread_helper+0x4/0x10 [<ffffffff815b614e>] ? restore_args+0x0/0x30 [<ffffffff810495b0>] ? kthread+0x0/0xb0 [<ffffffff810030e0>] ? kernel_thread_helper+0x0/0x10 Code: f0 4c 89 7d f8 4c 89 6d e8 48 8b 1c 25 40 b0 a1 81 49 89 fc 44 8b 8b d4 06 00 00 41 89 f6 49 89 d7 45 85 c9 0f 85 89 00 00 00 9c <58> 0f 1f 44 00 00 49 89 c5 fa 66 0f 1f 44 00 00 c7 83 d4 06 00 Call Trace: [<ffffffff8107fdea>] ? find_get_page+0x8a/0xc0 [<ffffffff8107fd60>] ? find_get_page+0x0/0xc0 [<ffffffff810d6ef1>] ? __find_get_block_slow+0x41/0x110 [<ffffffff810817d5>] ? find_lock_page+0x25/0x80 [<ffffffff81081dca>] ? find_or_create_page+0x3a/0xb0 [<ffffffff810d753e>] ? __getblk+0xee/0x2f0 [<ffffffff8119a7a2>] ? ext4_mb_init_cache+0x122/0xa30 [<ffffffff8108027f>] ? add_to_page_cache_locked+0xbf/0x100 [<ffffffff8119b18f>] ? ext4_mb_init_group+0xdf/0x2b0 [<ffffffff8119b42c>] ? ext4_mb_good_group+0xcc/0x110 [<ffffffff8119e611>] ? ext4_mb_regular_allocator+0x191/0x3e0 [<ffffffff81198026>] ? ext4_mb_use_preallocated+0xf6/0x2c0 [<ffffffff81197f60>] ? ext4_mb_use_preallocated+0x30/0x2c0 [<ffffffff8105b8cd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8119eb3b>] ? ext4_mb_new_blocks+0x2db/0x3f0 [<ffffffff81191d84>] ? ext4_ext_find_extent+0x2c4/0x320 [<ffffffff8119453b>] ? ext4_ext_map_blocks+0x4bb/0x1aa0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff8117d78b>] ? ext4_map_blocks+0xab/0x200 [<ffffffff8117d7c1>] ? ext4_map_blocks+0xe1/0x200 [<ffffffff8117eb27>] ? mpage_da_map_blocks+0xc7/0x420 [<ffffffff8118ace0>] ? ext4_journal_start_sb+0xf0/0x120 [<ffffffff8117f668>] ? ext4_da_writepages+0x2b8/0x560 [<ffffffff810d122b>] ? writeback_inodes_wb+0xdb/0x1a0 [<ffffffff8108821f>] ? do_writepages+0x1f/0x40 [<ffffffff810d0024>] ? writeback_single_inode+0xe4/0x3d0 [<ffffffff810d0809>] ? writeback_sb_inodes+0x199/0x2a0 [<ffffffff810d11bb>] ? writeback_inodes_wb+0x6b/0x1a0 [<ffffffff8102ad60>] ? T.944+0x0/0xd0 [<ffffffff810d151b>] ? wb_writeback+0x22b/0x290 [<ffffffff810d16ee>] ? wb_do_writeback+0x16e/0x180 [<ffffffff810d174b>] ? bdi_writeback_task+0x4b/0x140 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff810933d0>] ? bdi_start_fn+0x80/0xf0 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff8104964e>] ? kthread+0x9e/0xb0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff810030e4>] ? kernel_thread_helper+0x4/0x10 [<ffffffff815b614e>] ? restore_args+0x0/0x30 [<ffffffff810495b0>] ? kthread+0x0/0xb0 [<ffffffff810030e0>] ? kernel_thread_helper+0x0/0x10 BUG: soft lockup - CPU#0 stuck for 61s! [flush-7:0:954] irq event stamp: 324872 hardirqs last enabled at (324871): [<ffffffff815b614e>] restore_args+0x0/0x30 hardirqs last disabled at (324872): [<ffffffff810022f8>] save_args+0x68/0x70 softirqs last enabled at (324870): [<ffffffff81037477>] __do_softirq+0xe7/0x130 softirqs last disabled at (324857): [<ffffffff810031da>] call_softirq+0x1a/0x30 CPU 0 Pid: 954, comm: flush-7:0 Not tainted 2.6.35.6 #2 /Bochs RIP: 0010:[<ffffffff8107fdd0>] [<ffffffff8107fdd0>] find_get_page+0x70/0xc0 RSP: 0000:ffff88003e443510 EFLAGS: 00000246 RAX: ffff88003f59c478 RBX: ffff88003e443540 RCX: 0000000000000000 RDX: ffffea0000df44bf RSI: 0000000000000040 RDI: ffffea0000df44c0 RBP: ffffffff81002e0e R08: 0000000000000036 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88003fa9d7a0 R12: ffff88003f424e70 R13: ffff88003f424c90 R14: 0000000000000246 R15: ffff88003fa9d000 FS: 0000000000000000(0000) GS:ffffffff81a1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00000000f775a368 CR3: 000000003ead1000 CR4: 00000000000006b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process flush-7:0 (pid: 954, threadinfo ffff88003e442000, task ffff88003fa9d000) Stack: ffffffff8107fd60 ffffffff810d6ef1 ffffffff815b614e ffff88003f424e70 <0> 0000000000000040 0000000000000040 ffff88003e443570 ffffffff810817d5 <0> ffff88003e4435c0 0000000000000000 0000000000020058 0000000000000040 Call Trace: [<ffffffff8107fd60>] ? find_get_page+0x0/0xc0 [<ffffffff810d6ef1>] ? __find_get_block_slow+0x41/0x110 [<ffffffff815b614e>] ? restore_args+0x0/0x30 [<ffffffff810817d5>] ? find_lock_page+0x25/0x80 [<ffffffff81081dca>] ? find_or_create_page+0x3a/0xb0 [<ffffffff810d753e>] ? __getblk+0xee/0x2f0 [<ffffffff8119a7a2>] ? ext4_mb_init_cache+0x122/0xa30 [<ffffffff8108027f>] ? add_to_page_cache_locked+0xbf/0x100 [<ffffffff8119b18f>] ? ext4_mb_init_group+0xdf/0x2b0 [<ffffffff8119b42c>] ? ext4_mb_good_group+0xcc/0x110 [<ffffffff8119e611>] ? ext4_mb_regular_allocator+0x191/0x3e0 [<ffffffff81198026>] ? ext4_mb_use_preallocated+0xf6/0x2c0 [<ffffffff81197f60>] ? ext4_mb_use_preallocated+0x30/0x2c0 [<ffffffff8105b8cd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8119eb3b>] ? ext4_mb_new_blocks+0x2db/0x3f0 [<ffffffff81191d84>] ? ext4_ext_find_extent+0x2c4/0x320 [<ffffffff8119453b>] ? ext4_ext_map_blocks+0x4bb/0x1aa0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff8117d78b>] ? ext4_map_blocks+0xab/0x200 [<ffffffff8117d7c1>] ? ext4_map_blocks+0xe1/0x200 [<ffffffff8117eb27>] ? mpage_da_map_blocks+0xc7/0x420 [<ffffffff8118ace0>] ? ext4_journal_start_sb+0xf0/0x120 [<ffffffff8117f668>] ? ext4_da_writepages+0x2b8/0x560 [<ffffffff810d122b>] ? writeback_inodes_wb+0xdb/0x1a0 [<ffffffff8108821f>] ? do_writepages+0x1f/0x40 [<ffffffff810d0024>] ? writeback_single_inode+0xe4/0x3d0 [<ffffffff810d0809>] ? writeback_sb_inodes+0x199/0x2a0 [<ffffffff810d11bb>] ? writeback_inodes_wb+0x6b/0x1a0 [<ffffffff8102ad60>] ? T.944+0x0/0xd0 [<ffffffff810d151b>] ? wb_writeback+0x22b/0x290 [<ffffffff810d16ee>] ? wb_do_writeback+0x16e/0x180 [<ffffffff810d174b>] ? bdi_writeback_task+0x4b/0x140 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff810933d0>] ? bdi_start_fn+0x80/0xf0 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff8104964e>] ? kthread+0x9e/0xb0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff810030e4>] ? kernel_thread_helper+0x4/0x10 [<ffffffff815b614e>] ? restore_args+0x0/0x30 [<ffffffff810495b0>] ? kthread+0x0/0xb0 [<ffffffff810030e0>] ? kernel_thread_helper+0x0/0x10 Code: 89 de 4c 89 e7 e8 21 1f 33 00 48 85 c0 74 4c 48 8b 38 40 f6 c7 01 75 e7 48 8d 57 ff 49 89 fd 48 83 fa fd 77 da ff 47 08 48 3b 38 <75> 33 48 c7 c2 d2 fd 07 81 be 01 00 00 00 48 c7 c7 30 8c a2 81 Call Trace: [<ffffffff8107fd60>] ? find_get_page+0x0/0xc0 [<ffffffff810d6ef1>] ? __find_get_block_slow+0x41/0x110 [<ffffffff815b614e>] ? restore_args+0x0/0x30 [<ffffffff810817d5>] ? find_lock_page+0x25/0x80 [<ffffffff81081dca>] ? find_or_create_page+0x3a/0xb0 [<ffffffff810d753e>] ? __getblk+0xee/0x2f0 [<ffffffff8119a7a2>] ? ext4_mb_init_cache+0x122/0xa30 [<ffffffff8108027f>] ? add_to_page_cache_locked+0xbf/0x100 [<ffffffff8119b18f>] ? ext4_mb_init_group+0xdf/0x2b0 [<ffffffff8119b42c>] ? ext4_mb_good_group+0xcc/0x110 [<ffffffff8119e611>] ? ext4_mb_regular_allocator+0x191/0x3e0 [<ffffffff81198026>] ? ext4_mb_use_preallocated+0xf6/0x2c0 [<ffffffff81197f60>] ? ext4_mb_use_preallocated+0x30/0x2c0 [<ffffffff8105b8cd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8119eb3b>] ? ext4_mb_new_blocks+0x2db/0x3f0 [<ffffffff81191d84>] ? ext4_ext_find_extent+0x2c4/0x320 [<ffffffff8119453b>] ? ext4_ext_map_blocks+0x4bb/0x1aa0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff8117d78b>] ? ext4_map_blocks+0xab/0x200 [<ffffffff8117d7c1>] ? ext4_map_blocks+0xe1/0x200 [<ffffffff8117eb27>] ? mpage_da_map_blocks+0xc7/0x420 [<ffffffff8118ace0>] ? ext4_journal_start_sb+0xf0/0x120 [<ffffffff8117f668>] ? ext4_da_writepages+0x2b8/0x560 [<ffffffff810d122b>] ? writeback_inodes_wb+0xdb/0x1a0 [<ffffffff8108821f>] ? do_writepages+0x1f/0x40 [<ffffffff810d0024>] ? writeback_single_inode+0xe4/0x3d0 [<ffffffff810d0809>] ? writeback_sb_inodes+0x199/0x2a0 [<ffffffff810d11bb>] ? writeback_inodes_wb+0x6b/0x1a0 [<ffffffff8102ad60>] ? T.944+0x0/0xd0 [<ffffffff810d151b>] ? wb_writeback+0x22b/0x290 [<ffffffff810d16ee>] ? wb_do_writeback+0x16e/0x180 [<ffffffff810d174b>] ? bdi_writeback_task+0x4b/0x140 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff810933d0>] ? bdi_start_fn+0x80/0xf0 [<ffffffff81093350>] ? bdi_start_fn+0x0/0xf0 [<ffffffff8104964e>] ? kthread+0x9e/0xb0 [<ffffffff8105b87d>] ? trace_hardirqs_on_caller+0x13d/0x180 [<ffffffff810030e4>] ? kernel_thread_helper+0x4/0x10 [<ffffffff815b614e>] ? restore_args+0x0/0x30 [<ffffffff810495b0>] ? kthread+0x0/0xb0 [<ffffffff810030e0>] ? kernel_thread_helper+0x0/0x10 -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
