Vasily, I'm currently testing dm-dedup from the "dm-dedup-v3.19.3" branch on the git remote git://git.fsl.cs.sunysb.edu/linux-dmdedup.git. I'm encountering some random freeze/panic. Here's the commands I'm using and the panic which may appear: $ echo "0 314569779 dedup /dev/sda1 /dev/sda2 4096 md5 cowbtree 100" | dmsetup create mydedup $ mke2fs -t ext4 /dev/mapper/mydedup [ 16.338987] Unable to handle kernel paging request at virtual address e1b42a5c [ 16.346248] pgd = df7f0000 [ 16.348968] [e1b42a5c] *pgd=00000000 [ 16.352577] Internal error: Oops: 15 [#1] ARM [ 16.356954] Modules linked in: [ 16.360039] CPU: 0 PID: 65 Comm: klogd Not tainted 3.19.3-00163-ge64d974-dirty #455 [ 16.367729] Hardware name: Marvell Armada 370/XP (Device Tree) [ 16.373589] task: df7f6e80 ti: ded70000 task.ti: ded70000 [ 16.379018] PC is at __free_pages+0x10/0x4c [ 16.383228] LR is at my_endio+0x60/0x80 [ 16.387084] pc : [<c00842a8>] lr : [<c0400404>] psr: a0000113 [ 16.387084] sp : ded71e00 ip : 00000000 fp : df723708 [ 16.398613] r10: 00000000 r9 : 00000000 r8 : 00000000 [ 16.403862] r7 : 00001000 r6 : df747d00 r5 : 00001000 r4 : 00000000 [ 16.410419] r3 : dfb79000 r2 : e1b42a5c r1 : 00000000 r0 : e1b42a4c [ 16.416977] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 16.424144] Control: 10c5387d Table: 1f7f0019 DAC: 00000015 [ 16.429916] Process klogd (pid: 65, stack limit = 0xded70238) [ 16.435689] Stack: (0xded71e00 to 0xded72000) [ 16.440071] 1e00: dec5eac0 00001000 c02a95a4 c02a952c 00001000 00000000 dec5eac0 c02aee04 [ 16.448288] 1e20: df7f6e80 00000000 df747d00 df6ec000 decbe400 df723708 00000000 00000000 [ 16.456505] 1e40: 00000000 c035d16c df747d00 00000000 decbe400 00000000 00000000 00000000 [ 16.464723] 1e60: 00001000 c035e8c4 00000bb8 00000005 df6fd418 df67b000 c0744350 ded71ea0 [ 16.472940] 1e80: c08db550 00000100 c08db540 c0744350 00000004 c08db500 00000004 c02b5428 [ 16.481158] 1ea0: ded71ea0 ded71ea0 00000000 c001fdb4 df7f7210 df40a36c c08db540 0000000a [ 16.489375] 1ec0: ffff9132 00404100 df40a35c c08b4830 00000000 00000000 df406000 00000001 [ 16.497593] 1ee0: ded70000 00000000 000bfa3f c0020170 c08b4830 c004e23c c0ebbf80 000003ff [ 16.505811] 1f00: ded71f28 c0ebbf80 c000e4e4 c00085ec c005ca68 c005ca68 60000013 ffffffff [ 16.514029] 1f20: ded71f5c c0011700 00000000 c073c134 00000010 00000000 ded71f90 befe3c10 [ 16.522247] 1f40: 0000000c 0000004e c000e4e4 ded70000 00000000 000bfa3f d5555555 ded71f70 [ 16.530464] 1f60: c005ca68 c005ca68 60000013 ffffffff fbad8000 c005caa0 00000010 00000000 [ 16.538681] 1f80: 14035449 00000121 00000000 c00559c4 00000000 c0433cec 00000000 befe3c94 [ 16.546900] 1fa0: 000c2008 c000e360 befe3c94 000c2008 befe3c10 00000000 0000003e fbad8000 [ 16.555119] 1fc0: befe3c94 000c2008 0000000c 0000004e 00000000 befe3cd8 000a3db8 000bfa3f [ 16.563336] 1fe0: 00000000 befe3c0c b6ef08e8 b6ef091c 60000010 befe3c10 00000000 00000000 [ 16.571559] [<c00842a8>] (__free_pages) from [<c0400404>] (my_endio+0x60/0x80) [ 16.578830] [<c0400404>] (my_endio) from [<c02a952c>] (bio_endio+0x80/0xd0) [ 16.585833] [<c02a952c>] (bio_endio) from [<c02aee04>] (blk_update_request+0xc4/0x378) [ 16.593799] [<c02aee04>] (blk_update_request) from [<c035d16c>] (scsi_end_request+0x20/0x170) [ 16.602370] [<c035d16c>] (scsi_end_request) from [<c035e8c4>] (scsi_io_completion+0x84/0x530) [ 16.610938] [<c035e8c4>] (scsi_io_completion) from [<c02b5428>] (blk_done_softirq+0x6c/0x88) [ 16.619425] [<c02b5428>] (blk_done_softirq) from [<c001fdb4>] (__do_softirq+0xd8/0x224) [ 16.627470] [<c001fdb4>] (__do_softirq) from [<c0020170>] (irq_exit+0xa0/0xf0) [ 16.634733] [<c0020170>] (irq_exit) from [<c004e23c>] (__handle_domain_irq+0x50/0xa4) [ 16.642603] [<c004e23c>] (__handle_domain_irq) from [<c00085ec>] (armada_370_xp_handle_irq+0x48/0x58) [ 16.651877] [<c00085ec>] (armada_370_xp_handle_irq) from [<c0011700>] (__irq_svc+0x40/0x54) [ 16.660265] Exception stack(0xded71f28 to 0xded71f70) [ 16.665343] 1f20: 00000000 c073c134 00000010 00000000 ded71f90 befe3c10 [ 16.673561] 1f40: 0000000c 0000004e c000e4e4 ded70000 00000000 000bfa3f d5555555 ded71f70 [ 16.681776] 1f60: c005ca68 c005ca68 60000013 ffffffff [ 16.686865] [<c0011700>] (__irq_svc) from [<c005ca68>] (getnstimeofday64+0x8/0x2c) [ 16.694475] [<c005ca68>] (getnstimeofday64) from [<c005caa0>] (do_gettimeofday+0x14/0x44) [ 16.702694] [<c005caa0>] (do_gettimeofday) from [<c00559c4>] (SyS_gettimeofday+0x1c/0xb8) [ 16.710912] [<c00559c4>] (SyS_gettimeofday) from [<c000e360>] (ret_fast_syscall+0x0/0x34) [ 16.719129] Code: e92d0030 e2802010 e1a04001 f5d2f000 (e192cf9f) [ 16.725255] ---[ end trace d8c1eb600c427385 ]--- [ 16.729895] Kernel panic - not syncing: Fatal exception in interrupt [ 16.736280] ---[ end Kernel panic - not syncing: Fatal exception in interrupt I also tried $ dd if=/dev/urandom of=/dev/mapper/mydedup bs=4K count=1024 which leads to the same result. -- Vincent. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
