Dear All, While running my usb storage driver with WRITE commands I am getting following trace. In my storage driver READs and WRITEs will execute in parallel. Can any one give me suggestion how i can debug to find the exact problem. The call trace below did not show anything in the driver, so i'm not able to find the root cause of problem. init: Id "co" respawning too fast: disabled for 5 minutes kernel: INFO: task nautilus:2641 blocked for more than 120 seconds. kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kernel: nautilus D 3312cf10 0 2641 2260 kernel: cf4a3000 00200086 00000000 3312cf10 0000001e cf625a40 cf625cbc c13f9860 kernel: 00000000 00800010 00024210 00000000 00024208 de15f198 c043d46e 00017934 kernel: de15f198 00017934 c13f9860 00000000 de7f6d2c c13f14d0 c062b9b9 c062bbd5 kernel: Call Trace: kernel: [<c043d46e>] ? getnstimeofday+0x52/0xd6 kernel: [<c062b9b9>] ? schedule+0x5/0x13 kernel: [<c062bbd5>] ? io_schedule+0x44/0x75 kernel: [<c04a225f>] ? sync_buffer+0x30/0x33 kernel: [<c062be6d>] ? __wait_on_bit+0x33/0x58 kernel: [<c04a222f>] ? sync_buffer+0x0/0x33 kernel: [<c04a222f>] ? sync_buffer+0x0/0x33 kernel: [<c062bef1>] ? out_of_line_wait_on_bit+0x5f/0x67 kernel: [<c04376d1>] ? wake_bit_function+0x0/0x3c kernel: [<c04a21c2>] ? __wait_on_buffer+0x16/0x18 kernel: [<c04a3cb3>] ? bh_submit_read+0x57/0x66 kernel: [<e005f645>] ? read_block_bitmap+0x6f/0x11a [ext3] kernel: [<e00600c3>] ? ext3_new_blocks+0x197/0x620 [ext3] kernel: [<e0063144>] ? ext3_get_blocks_handle+0x376/0x7d7 [ext3] kernel: [<e0030bdb>] ? journal_cancel_revoke+0x76/0x97 [jbd] kernel: [<e002e4a3>] ? journal_dirty_metadata+0xad/0xc0 [jbd] kernel: [<e006decf>] ? __ext3_journal_dirty_metadata+0x13/0x32 [ext3] kernel: [<e00626d4>] ? ext3_mark_iloc_dirty+0x281/0x2dc [ext3] kernel: [<e00635ef>] ? ext3_getblk+0x4a/0x190 [ext3] kernel: [<c04910b8>] ? __link_path_walk+0x9cf/0xa61 kernel: [<c0489a99>] ? file_move+0x29/0x33 kernel: [<e006443d>] ? ext3_bread+0x13/0x74 [ext3] kernel: [<e00683f1>] ? ext3_mkdir+0xd6/0x256 [ext3] kernel: [<c048ff32>] ? vfs_mkdir+0xa7/0x115 kernel: [<c04918b5>] ? sys_mkdirat+0x7c/0xb5 kernel: [<c043d46e>] ? getnstimeofday+0x52/0xd6 kernel: [<c04538b5>] ? audit_syscall_entry+0x17b/0x19d kernel: [<c04918fd>] ? sys_mkdir+0xf/0x13 kernel: [<c0402844>] ? sysenter_do_call+0x12/0x22 kernel: INFO: task kjournald:2597 blocked for more than 120 seconds. kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kernel: kjournald D 32f7bfb0 0 2597 2 Regards, Aditya -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
