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* Badness in local_bh_enable at kernel/softirq.c:140 with inet_stream
@ 2006-04-06 17:18 jordi Vaquero
  2006-04-06 17:59 ` linux-os (Dick Johnson)
  0 siblings, 1 reply; 3+ messages in thread
From: jordi Vaquero @ 2006-04-06 17:18 UTC (permalink / raw)
  To: linux-kernel

Hello

I'm trying to make a Linux Kernel module. My module has a network
comunication with sockets, I use the functions like this skeleton,

            sd = sock_create(AF_INET,SOCK_STREAM,IPPROTO_TCP,&sock);
                if(sd<0){
                printk(KERN_ERR "Error\n");
            }else{
                sout.sin_family = AF_INET;
                err = inet_aton("172.16.151.1",&sout.sin_addr); //this
        function works well, I implemented it.
                sout.sin_port = htons(20000);
                sd = sock->ops->connect(sock,(struct sockaddr*)&sout,
        sizeof(sout),O_RDWR);
                if(sd<0){
                    printk(KERN_ERR "Error \n");
                    sock_release(sock);
                }else{
                     USE SENDMSG and RECVMSG
                        ...
                        ...
                        ...
                   sock_release(sock);
                }

My problem is that sometimes, at some point near the connect function, a
warning is launched and dmesg shows this:

                                                            Badness in
        local_bh_enable at kernel/softirq.c:140
        Apr  5 20:24:57 localhost kernel:  [local_bh_enable+37/92]
        local_bh_enable+0x25/0x5c
        Apr  5 20:24:57 localhost kernel:  [inet_stream_connect+22/324]
        inet_stream_connect+0x16/0x144
        Apr  5 20:24:57 localhost kernel:  [pg0+140346179/1070617600]
        remote_send_swap+0xad/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [printk+18/22] printk+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [pg0+140346824/1070617600]
        remote_send_swap+0x332/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [scrup+81/174] scrup+0x51/0xae
        Apr  5 20:24:57 localhost kernel:  [vgacon_cursor+307/314]
        vgacon_cursor+0x133/0x13a
        Apr  5 20:24:57 localhost kernel:  [set_cursor+78/91]
        set_cursor+0x4e/0x5b
        Apr  5 20:24:57 localhost kernel:  [vt_console_print+523/540]
        vt_console_print+0x20b/0x21c
        Apr  5 20:24:57 localhost kernel: 
        [__call_console_drivers+55/69] __call_console_drivers+0x37/0x45
        Apr  5 20:24:57 localhost kernel: 
        [call_console_drivers+226/234] call_console_drivers+0xe2/0xea
        Apr  5 20:24:57 localhost kernel:  [vprintk+467/494]
        vprintk+0x1d3/0x1ee
        Apr  5 20:24:57 localhost kernel:  [__make_request+1020/1068]
        __make_request+0x3fc/0x42c
        Apr  5 20:24:57 localhost kernel:  [pg0+140346943/1070617600]
        rswap_send+0x6c/0x88 [rswap]
        Apr  5 20:24:57 localhost kernel:  [pg0+140347045/1070617600]
        request_dd+0x4a/0x71 [rswap]
        Apr  5 20:24:57 localhost kernel:  [blk_remove_plug+70/80]
        blk_remove_plug+0x46/0x50
        Apr  5 20:24:57 localhost kernel:  [sync_page+0/61]
        sync_page+0x0/0x3d
        Apr  5 20:24:57 localhost kernel:  [generic_unplug_device+10/13]
        generic_unplug_device+0xa/0xd
        Apr  5 20:24:57 localhost kernel:  [block_sync_page+53/58]
        block_sync_page+0x35/0x3a
        Apr  5 20:24:57 localhost kernel:  [sync_page+52/61]
        sync_page+0x34/0x3d
        Apr  5 20:24:57 localhost kernel:  [__wait_on_bit_lock+43/81]
        __wait_on_bit_lock+0x2b/0x51
        Apr  5 20:24:57 localhost kernel:  [__lock_page+84/90]
        __lock_page+0x54/0x5a
        Apr  5 20:24:57 localhost kernel:  [wake_bit_function+0/52]
        wake_bit_function+0x0/0x34
        Apr  5 20:24:57 localhost kernel:  [read_cache_page+198/271]
        read_cache_page+0xc6/0x10f
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [read_dev_sector+44/131]
        read_dev_sector+0x2c/0x83
        Apr  5 20:24:57 localhost kernel:  [blkdev_readpage+0/21]
        blkdev_readpage+0x0/0x15
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+30/263]
        parse_solaris_x86+0x1e/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [msdos_partition+514/596]
        msdos_partition+0x202/0x254
        Apr  5 20:24:57 localhost kernel:  [check_partition+136/204]
        check_partition+0x88/0xcc
        Apr  5 20:24:57 localhost kernel:  [rescan_partitions+97/166]
        rescan_partitions+0x61/0xa6
        Apr  5 20:24:57 localhost kernel:  [blkdev_reread_part+73/97]
        blkdev_reread_part+0x49/0x61
        Apr  5 20:24:57 localhost kernel:  [blkdev_ioctl+250/297]
        blkdev_ioctl+0xfa/0x129
        Apr  5 20:24:57 localhost kernel:  [block_ioctl+26/30]
        block_ioctl+0x1a/0x1e
        Apr  5 20:24:57 localhost kernel:  [do_ioctl+33/86]
        do_ioctl+0x21/0x56
        Apr  5 20:24:57 localhost kernel:  [vfs_ioctl+348/363]
        vfs_ioctl+0x15c/0x16b
        Apr  5 20:24:57 localhost kernel:  [sys_ioctl+43/70]
        sys_ioctl+0x2b/0x46
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75
        Apr  5 20:24:57 localhost kernel: Badness in local_bh_enable at
        kernel/softirq.c:140
        Apr  5 20:24:57 localhost kernel:  [local_bh_enable+37/92]
        local_bh_enable+0x25/0x5c
        Apr  5 20:24:57 localhost kernel: 
        [__ip_route_output_key+188/196] __ip_route_output_key+0xbc/0xc4
        Apr  5 20:24:57 localhost kernel:  [tcp_v4_connect+273/2229]
        tcp_v4_connect+0x111/0x8b5
        Apr  5 20:24:57 localhost kernel:  [dump_stack+18/22]
        dump_stack+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [inet_stream_connect+123/324]
        inet_stream_connect+0x7b/0x144
        Apr  5 20:24:57 localhost kernel:  [pg0+140346179/1070617600]
        remote_send_swap+0xad/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [printk+18/22] printk+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [pg0+140346824/1070617600]
        remote_send_swap+0x332/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [scrup+81/174] scrup+0x51/0xae
        Apr  5 20:24:57 localhost kernel:  [vgacon_cursor+307/314]
        vgacon_cursor+0x133/0x13a
        Apr  5 20:24:57 localhost kernel:  [set_cursor+78/91]
        set_cursor+0x4e/0x5b
        Apr  5 20:24:57 localhost kernel:  [vt_console_print+523/540]
        vt_console_print+0x20b/0x21c
        Apr  5 20:24:57 localhost kernel: 
        [__call_console_drivers+55/69] __call_console_drivers+0x37/0x45
        Apr  5 20:24:57 localhost kernel: 
        [call_console_drivers+226/234] call_console_drivers+0xe2/0xea
        Apr  5 20:24:57 localhost kernel:  [vprintk+467/494]
        vprintk+0x1d3/0x1ee
        Apr  5 20:24:57 localhost kernel:  [__make_request+1020/1068]
        __make_request+0x3fc/0x42c
        Apr  5 20:24:57 localhost kernel:  [pg0+140346943/1070617600]
        rswap_send+0x6c/0x88 [rswap]
        Apr  5 20:24:57 localhost kernel:  [pg0+140347045/1070617600]
        request_dd+0x4a/0x71 [rswap]
        Apr  5 20:24:57 localhost kernel:  [blk_remove_plug+70/80]
        blk_remove_plug+0x46/0x50
        Apr  5 20:24:57 localhost kernel:  [sync_page+0/61]
        sync_page+0x0/0x3d
        Apr  5 20:24:57 localhost kernel:  [generic_unplug_device+10/13]
        generic_unplug_device+0xa/0xd
        Apr  5 20:24:57 localhost kernel:  [block_sync_page+53/58]
        block_sync_page+0x35/0x3a
        Apr  5 20:24:57 localhost kernel:  [sync_page+52/61]
        sync_page+0x34/0x3d
        Apr  5 20:24:57 localhost kernel:  [__wait_on_bit_lock+43/81]
        __wait_on_bit_lock+0x2b/0x51
        Apr  5 20:24:57 localhost kernel:  [__lock_page+84/90]
        __lock_page+0x54/0x5a
        Apr  5 20:24:57 localhost kernel:  [wake_bit_function+0/52]
        wake_bit_function+0x0/0x34
        Apr  5 20:24:57 localhost kernel:  [read_cache_page+198/271]
        read_cache_page+0xc6/0x10f
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [read_dev_sector+44/131]
        read_dev_sector+0x2c/0x83
        Apr  5 20:24:57 localhost kernel:  [blkdev_readpage+0/21]
        blkdev_readpage+0x0/0x15
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+30/263]
        parse_solaris_x86+0x1e/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [msdos_partition+514/596]
        msdos_partition+0x202/0x254
        Apr  5 20:24:57 localhost kernel:  [check_partition+136/204]
        check_partition+0x88/0xcc
        Apr  5 20:24:57 localhost kernel:  [rescan_partitions+97/166]
        rescan_partitions+0x61/0xa6
        Apr  5 20:24:57 localhost kernel:  [blkdev_reread_part+73/97]
        blkdev_reread_part+0x49/0x61
        Apr  5 20:24:57 localhost kernel:  [blkdev_ioctl+250/297]
        blkdev_ioctl+0xfa/0x129
        Apr  5 20:24:57 localhost kernel:  [block_ioctl+26/30]
        block_ioctl+0x1a/0x1e
        Apr  5 20:24:57 localhost kernel:  [do_ioctl+33/86]
        do_ioctl+0x21/0x56
        Apr  5 20:24:57 localhost kernel:  [vfs_ioctl+348/363]
        vfs_ioctl+0x15c/0x16b
        Apr  5 20:24:57 localhost kernel:  [sys_ioctl+43/70]
        sys_ioctl+0x2b/0x46
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75
        Apr  5 20:24:57 localhost kernel: Badness in local_bh_enable at
        kernel/softirq.c:140
        Apr  5 20:24:57 localhost kernel:  [local_bh_enable+37/92]
        local_bh_enable+0x25/0x5c
        Apr  5 20:24:57 localhost kernel: 
        [__ip_route_output_key+188/196] __ip_route_output_key+0xbc/0xc4
        Apr  5 20:24:57 localhost kernel:  [ip_route_output_flow+17/74]
        ip_route_output_flow+0x11/0x4a
        Apr  5 20:24:57 localhost kernel:  [tcp_v4_connect+387/2229]
        tcp_v4_connect+0x183/0x8b5
        Apr  5 20:24:57 localhost kernel:  [dump_stack+18/22]
        dump_stack+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [inet_stream_connect+123/324]
        inet_stream_connect+0x7b/0x144
        Apr  5 20:24:57 localhost kernel:  [pg0+140346179/1070617600]
        remote_send_swap+0xad/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [printk+18/22] printk+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [pg0+140346824/1070617600]
        remote_send_swap+0x332/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [scrup+81/174] scrup+0x51/0xae
        Apr  5 20:24:57 localhost kernel:  [vgacon_cursor+307/314]
        vgacon_cursor+0x133/0x13a
        Apr  5 20:24:57 localhost kernel:  [set_cursor+78/91]
        set_cursor+0x4e/0x5b
        Apr  5 20:24:57 localhost kernel:  [vt_console_print+523/540]
        vt_console_print+0x20b/0x21c
        Apr  5 20:24:57 localhost kernel: 
        [__call_console_drivers+55/69] __call_console_drivers+0x37/0x45
        Apr  5 20:24:57 localhost kernel: 
        [call_console_drivers+226/234] call_console_drivers+0xe2/0xea
        Apr  5 20:24:57 localhost kernel:  [vprintk+467/494]
        vprintk+0x1d3/0x1ee
        Apr  5 20:24:57 localhost kernel:  [__make_request+1020/1068]
        __make_request+0x3fc/0x42c
        Apr  5 20:24:57 localhost kernel:  [pg0+140346943/1070617600]
        rswap_send+0x6c/0x88 [rswap]
        Apr  5 20:24:57 localhost kernel:  [pg0+140347045/1070617600]
        request_dd+0x4a/0x71 [rswap]
        Apr  5 20:24:57 localhost kernel:  [blk_remove_plug+70/80]
        blk_remove_plug+0x46/0x50
        Apr  5 20:24:57 localhost kernel:  [sync_page+0/61]
        sync_page+0x0/0x3d
        Apr  5 20:24:57 localhost kernel:  [generic_unplug_device+10/13]
        generic_unplug_device+0xa/0xd
        Apr  5 20:24:57 localhost kernel:  [block_sync_page+53/58]
        block_sync_page+0x35/0x3a
        Apr  5 20:24:57 localhost kernel:  [sync_page+52/61]
        sync_page+0x34/0x3d
        Apr  5 20:24:57 localhost kernel:  [__wait_on_bit_lock+43/81]
        __wait_on_bit_lock+0x2b/0x51
        Apr  5 20:24:57 localhost kernel:  [__lock_page+84/90]
        __lock_page+0x54/0x5a
        Apr  5 20:24:57 localhost kernel:  [wake_bit_function+0/52]
        wake_bit_function+0x0/0x34
        Apr  5 20:24:57 localhost kernel:  [read_cache_page+198/271]
        read_cache_page+0xc6/0x10f
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [read_dev_sector+44/131]
        read_dev_sector+0x2c/0x83
        Apr  5 20:24:57 localhost kernel:  [blkdev_readpage+0/21]
        blkdev_readpage+0x0/0x15
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+30/263]
        parse_solaris_x86+0x1e/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [msdos_partition+514/596]
        msdos_partition+0x202/0x254
        Apr  5 20:24:57 localhost kernel:  [check_partition+136/204]
        check_partition+0x88/0xcc
        Apr  5 20:24:57 localhost kernel:  [rescan_partitions+97/166]
        rescan_partitions+0x61/0xa6
        Apr  5 20:24:57 localhost kernel:  [blkdev_reread_part+73/97]
        blkdev_reread_part+0x49/0x61
        Apr  5 20:24:57 localhost kernel:  [blkdev_ioctl+250/297]
        blkdev_ioctl+0xfa/0x129
        Apr  5 20:24:57 localhost kernel:  [block_ioctl+26/30]
        block_ioctl+0x1a/0x1e
        Apr  5 20:24:57 localhost kernel:  [do_ioctl+33/86]
        do_ioctl+0x21/0x56
        Apr  5 20:24:57 localhost kernel:  [vfs_ioctl+348/363]
        vfs_ioctl+0x15c/0x16b
        Apr  5 20:24:57 localhost kernel:  [sys_ioctl+43/70]
        sys_ioctl+0x2b/0x46
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75
        Apr  5 20:24:57 localhost kernel: Badness in local_bh_enable at
        kernel/softirq.c:140
        Apr  5 20:24:57 localhost kernel:  [local_bh_enable+37/92]
        local_bh_enable+0x25/0x5c
        Apr  5 20:24:57 localhost kernel:  [tcp_v4_connect+1613/2229]
        tcp_v4_connect+0x64d/0x8b5
        Apr  5 20:24:57 localhost kernel:  [inet_stream_connect+123/324]
        inet_stream_connect+0x7b/0x144
        Apr  5 20:24:57 localhost kernel:  [pg0+140346179/1070617600]
        remote_send_swap+0xad/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [printk+18/22] printk+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [pg0+140346824/1070617600]
        remote_send_swap+0x332/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [scrup+81/174] scrup+0x51/0xae
        Apr  5 20:24:57 localhost kernel:  [vgacon_cursor+307/314]
        vgacon_cursor+0x133/0x13a
        Apr  5 20:24:57 localhost kernel:  [set_cursor+78/91]
        set_cursor+0x4e/0x5b
        Apr  5 20:24:57 localhost kernel:  [vt_console_print+523/540]
        vt_console_print+0x20b/0x21c
        Apr  5 20:24:57 localhost kernel: 
        [__call_console_drivers+55/69] __call_console_drivers+0x37/0x45
        Apr  5 20:24:57 localhost kernel: 
        [call_console_drivers+226/234] call_console_drivers+0xe2/0xea
        Apr  5 20:24:57 localhost kernel:  [vprintk+467/494]
        vprintk+0x1d3/0x1ee
        Apr  5 20:24:57 localhost kernel:  [__make_request+1020/1068]
        __make_request+0x3fc/0x42c
        Apr  5 20:24:57 localhost kernel:  [pg0+140346943/1070617600]
        rswap_send+0x6c/0x88 [rswap]
        Apr  5 20:24:57 localhost kernel:  [pg0+140347045/1070617600]
        request_dd+0x4a/0x71 [rswap]
        Apr  5 20:24:57 localhost kernel:  [blk_remove_plug+70/80]
        blk_remove_plug+0x46/0x50
        Apr  5 20:24:57 localhost kernel:  [sync_page+0/61]
        sync_page+0x0/0x3d
        Apr  5 20:24:57 localhost kernel:  [generic_unplug_device+10/13]
        generic_unplug_device+0xa/0xd
        Apr  5 20:24:57 localhost kernel:  [block_sync_page+53/58]
        block_sync_page+0x35/0x3a
        Apr  5 20:24:57 localhost kernel:  [sync_page+52/61]
        sync_page+0x34/0x3d
        Apr  5 20:24:57 localhost kernel:  [__wait_on_bit_lock+43/81]
        __wait_on_bit_lock+0x2b/0x51
        Apr  5 20:24:57 localhost kernel:  [__lock_page+84/90]
        __lock_page+0x54/0x5a
        Apr  5 20:24:57 localhost kernel:  [wake_bit_function+0/52]
        wake_bit_function+0x0/0x34
        Apr  5 20:24:57 localhost kernel:  [read_cache_page+198/271]
        read_cache_page+0xc6/0x10f
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [read_dev_sector+44/131]
        read_dev_sector+0x2c/0x83
        Apr  5 20:24:57 localhost kernel:  [blkdev_readpage+0/21]
        blkdev_readpage+0x0/0x15
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+30/263]
        parse_solaris_x86+0x1e/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [msdos_partition+514/596]
        msdos_partition+0x202/0x254
        Apr  5 20:24:57 localhost kernel:  [check_partition+136/204]
        check_partition+0x88/0xcc
        Apr  5 20:24:57 localhost kernel:  [rescan_partitions+97/166]
        rescan_partitions+0x61/0xa6
        Apr  5 20:24:57 localhost kernel:  [blkdev_reread_part+73/97]
        blkdev_reread_part+0x49/0x61
        Apr  5 20:24:57 localhost kernel:  [blkdev_ioctl+250/297]
        blkdev_ioctl+0xfa/0x129
        Apr  5 20:24:57 localhost kernel:  [block_ioctl+26/30]
        block_ioctl+0x1a/0x1e
        Apr  5 20:24:57 localhost kernel:  [do_ioctl+33/86]
        do_ioctl+0x21/0x56
        Apr  5 20:24:57 localhost kernel:  [vfs_ioctl+348/363]
        vfs_ioctl+0x15c/0x16b
        Apr  5 20:24:57 localhost kernel:  [sys_ioctl+43/70]
        sys_ioctl+0x2b/0x46
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75
        Apr  5 20:24:57 localhost kernel: Badness in local_bh_enable at
        kernel/softirq.c:140
        Apr  5 20:24:57 localhost kernel:  [local_bh_enable+37/92]
        local_bh_enable+0x25/0x5c
        Apr  5 20:24:57 localhost kernel: 
        [__ip_route_output_key+188/196] __ip_route_output_key+0xbc/0xc4
        Apr  5 20:24:57 localhost kernel:  [ip_route_output_flow+17/74]
        ip_route_output_flow+0x11/0x4a
        Apr  5 20:24:57 localhost kernel:  [tcp_v4_connect+1793/2229]
        tcp_v4_connect+0x701/0x8b5
        Apr  5 20:24:57 localhost kernel:  [inet_stream_connect+123/324]
        inet_stream_connect+0x7b/0x144
        Apr  5 20:24:57 localhost kernel:  [pg0+140346179/1070617600]
        remote_send_swap+0xad/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [printk+18/22] printk+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [pg0+140346824/1070617600]
        remote_send_swap+0x332/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [scrup+81/174] scrup+0x51/0xae
        Apr  5 20:24:57 localhost kernel:  [vgacon_cursor+307/314]
        vgacon_cursor+0x133/0x13a
        Apr  5 20:24:57 localhost kernel:  [set_cursor+78/91]
        set_cursor+0x4e/0x5b
        Apr  5 20:24:57 localhost kernel:  [vt_console_print+523/540]
        vt_console_print+0x20b/0x21c
        Apr  5 20:24:57 localhost kernel: 
        [__call_console_drivers+55/69] __call_console_drivers+0x37/0x45
        Apr  5 20:24:57 localhost kernel: 
        [call_console_drivers+226/234] call_console_drivers+0xe2/0xea
        Apr  5 20:24:57 localhost kernel:  [vprintk+467/494]
        vprintk+0x1d3/0x1ee
        Apr  5 20:24:57 localhost kernel:  [__make_request+1020/1068]
        __make_request+0x3fc/0x42c
        Apr  5 20:24:57 localhost kernel:  [pg0+140346943/1070617600]
        rswap_send+0x6c/0x88 [rswap]
        Apr  5 20:24:57 localhost kernel:  [pg0+140347045/1070617600]
        request_dd+0x4a/0x71 [rswap]
        Apr  5 20:24:57 localhost kernel:  [blk_remove_plug+70/80]
        blk_remove_plug+0x46/0x50
        Apr  5 20:24:57 localhost kernel:  [sync_page+0/61]
        sync_page+0x0/0x3d
        Apr  5 20:24:57 localhost kernel:  [generic_unplug_device+10/13]
        generic_unplug_device+0xa/0xd
        Apr  5 20:24:57 localhost kernel:  [block_sync_page+53/58]
        block_sync_page+0x35/0x3a
        Apr  5 20:24:57 localhost kernel:  [sync_page+52/61]
        sync_page+0x34/0x3d
        Apr  5 20:24:57 localhost kernel:  [__wait_on_bit_lock+43/81]
        __wait_on_bit_lock+0x2b/0x51
        Apr  5 20:24:57 localhost kernel:  [__lock_page+84/90]
        __lock_page+0x54/0x5a
        Apr  5 20:24:57 localhost kernel:  [wake_bit_function+0/52]
        wake_bit_function+0x0/0x34
        Apr  5 20:24:57 localhost kernel:  [read_cache_page+198/271]
        read_cache_page+0xc6/0x10f
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [read_dev_sector+44/131]
        read_dev_sector+0x2c/0x83
        Apr  5 20:24:57 localhost kernel:  [blkdev_readpage+0/21]
        blkdev_readpage+0x0/0x15
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+30/263]
        parse_solaris_x86+0x1e/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [msdos_partition+514/596]
        msdos_partition+0x202/0x254
        Apr  5 20:24:57 localhost kernel:  [check_partition+136/204]
        check_partition+0x88/0xcc
        Apr  5 20:24:57 localhost kernel:  [rescan_partitions+97/166]
        rescan_partitions+0x61/0xa6
        Apr  5 20:24:57 localhost kernel:  [blkdev_reread_part+73/97]
        blkdev_reread_part+0x49/0x61
        Apr  5 20:24:57 localhost kernel:  [blkdev_ioctl+250/297]
        blkdev_ioctl+0xfa/0x129
        Apr  5 20:24:57 localhost kernel:  [block_ioctl+26/30]
        block_ioctl+0x1a/0x1e
        Apr  5 20:24:57 localhost kernel:  [do_ioctl+33/86]
        do_ioctl+0x21/0x56
        Apr  5 20:24:57 localhost kernel:  [vfs_ioctl+348/363]
        vfs_ioctl+0x15c/0x16b
        Apr  5 20:24:57 localhost kernel:  [sys_ioctl+43/70]
        sys_ioctl+0x2b/0x46
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75
        Apr  5 20:24:57 localhost kernel: Badness in local_bh_enable at
        kernel/softirq.c:140
        Apr  5 20:24:57 localhost kernel:  [local_bh_enable+37/92]
        local_bh_enable+0x25/0x5c
        Apr  5 20:24:57 localhost kernel:  [ip_output+399/533]
        ip_output+0x18f/0x215
        Apr  5 20:24:57 localhost kernel:  [ip_queue_xmit+909/1011]
        ip_queue_xmit+0x38d/0x3f3
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75
        Apr  5 20:24:57 localhost kernel:  [tcp_v4_send_check+123/193]
        tcp_v4_send_check+0x7b/0xc1
        Apr  5 20:24:57 localhost kernel:  [tcp_transmit_skb+1437/1642]
        tcp_transmit_skb+0x59d/0x66a
        Apr  5 20:24:57 localhost kernel:  [tcp_connect+693/794]
        tcp_connect+0x2b5/0x31a
        Apr  5 20:24:57 localhost kernel:  [tcp_v4_connect+1983/2229]
        tcp_v4_connect+0x7bf/0x8b5
        Apr  5 20:24:57 localhost kernel:  [inet_stream_connect+123/324]
        inet_stream_connect+0x7b/0x144
        Apr  5 20:24:57 localhost kernel:  [pg0+140346179/1070617600]
        remote_send_swap+0xad/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [printk+18/22] printk+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [pg0+140346824/1070617600]
        remote_send_swap+0x332/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [scrup+81/174] scrup+0x51/0xae
        Apr  5 20:24:57 localhost kernel:  [vgacon_cursor+307/314]
        vgacon_cursor+0x133/0x13a
        Apr  5 20:24:57 localhost kernel:  [set_cursor+78/91]
        set_cursor+0x4e/0x5b
        Apr  5 20:24:57 localhost kernel:  [vt_console_print+523/540]
        vt_console_print+0x20b/0x21c
        Apr  5 20:24:57 localhost kernel: 
        [__call_console_drivers+55/69] __call_console_drivers+0x37/0x45
        Apr  5 20:24:57 localhost kernel: 
        [call_console_drivers+226/234] call_console_drivers+0xe2/0xea
        Apr  5 20:24:57 localhost kernel:  [vprintk+467/494]
        vprintk+0x1d3/0x1ee
        Apr  5 20:24:57 localhost kernel:  [__make_request+1020/1068]
        __make_request+0x3fc/0x42c
        Apr  5 20:24:57 localhost kernel:  [pg0+140346943/1070617600]
        rswap_send+0x6c/0x88 [rswap]
        Apr  5 20:24:57 localhost kernel:  [pg0+140347045/1070617600]
        request_dd+0x4a/0x71 [rswap]
        Apr  5 20:24:57 localhost kernel:  [blk_remove_plug+70/80]
        blk_remove_plug+0x46/0x50
        Apr  5 20:24:57 localhost kernel:  [sync_page+0/61]
        sync_page+0x0/0x3d
        Apr  5 20:24:57 localhost kernel:  [generic_unplug_device+10/13]
        generic_unplug_device+0xa/0xd
        Apr  5 20:24:57 localhost kernel:  [block_sync_page+53/58]
        block_sync_page+0x35/0x3a
        Apr  5 20:24:57 localhost kernel:  [sync_page+52/61]
        sync_page+0x34/0x3d
        Apr  5 20:24:57 localhost kernel:  [__wait_on_bit_lock+43/81]
        __wait_on_bit_lock+0x2b/0x51
        Apr  5 20:24:57 localhost kernel:  [__lock_page+84/90]
        __lock_page+0x54/0x5a
        Apr  5 20:24:57 localhost kernel:  [wake_bit_function+0/52]
        wake_bit_function+0x0/0x34
        Apr  5 20:24:57 localhost kernel:  [read_cache_page+198/271]
        read_cache_page+0xc6/0x10f
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [read_dev_sector+44/131]
        read_dev_sector+0x2c/0x83
        Apr  5 20:24:57 localhost kernel:  [blkdev_readpage+0/21]
        blkdev_readpage+0x0/0x15
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+30/263]
        parse_solaris_x86+0x1e/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [msdos_partition+514/596]
        msdos_partition+0x202/0x254
        Apr  5 20:24:57 localhost kernel:  [check_partition+136/204]
        check_partition+0x88/0xcc
        Apr  5 20:24:57 localhost kernel:  [rescan_partitions+97/166]
        rescan_partitions+0x61/0xa6
        Apr  5 20:24:57 localhost kernel:  [blkdev_reread_part+73/97]
        blkdev_reread_part+0x49/0x61
        Apr  5 20:24:57 localhost kernel:  [blkdev_ioctl+250/297]
        blkdev_ioctl+0xfa/0x129
        Apr  5 20:24:57 localhost kernel:  [block_ioctl+26/30]
        block_ioctl+0x1a/0x1e
        Apr  5 20:24:57 localhost kernel:  [do_ioctl+33/86]
        do_ioctl+0x21/0x56
        Apr  5 20:24:57 localhost kernel:  [vfs_ioctl+348/363]
        vfs_ioctl+0x15c/0x16b
        Apr  5 20:24:57 localhost kernel:  [sys_ioctl+43/70]
        sys_ioctl+0x2b/0x46
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75
        Apr  5 20:24:57 localhost kernel: Badness in local_bh_enable at
        kernel/softirq.c:140
        Apr  5 20:24:57 localhost kernel:  [local_bh_enable+37/92]
        local_bh_enable+0x25/0x5c
        Apr  5 20:24:57 localhost kernel:  [dev_queue_xmit+410/416]
        dev_queue_xmit+0x19a/0x1a0
        Apr  5 20:24:57 localhost kernel:  [ip_output+447/533]
        ip_output+0x1bf/0x215
        Apr  5 20:24:57 localhost kernel:  [ip_queue_xmit+909/1011]
        ip_queue_xmit+0x38d/0x3f3
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75
        Apr  5 20:24:57 localhost kernel:  [tcp_v4_send_check+123/193]
        tcp_v4_send_check+0x7b/0xc1
        Apr  5 20:24:57 localhost kernel:  [tcp_transmit_skb+1437/1642]
        tcp_transmit_skb+0x59d/0x66a
        Apr  5 20:24:57 localhost kernel:  [tcp_connect+693/794]
        tcp_connect+0x2b5/0x31a
        Apr  5 20:24:57 localhost kernel:  [tcp_v4_connect+1983/2229]
        tcp_v4_connect+0x7bf/0x8b5
        Apr  5 20:24:57 localhost kernel:  [inet_stream_connect+123/324]
        inet_stream_connect+0x7b/0x144
        Apr  5 20:24:57 localhost kernel:  [pg0+140346179/1070617600]
        remote_send_swap+0xad/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [printk+18/22] printk+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [pg0+140346824/1070617600]
        remote_send_swap+0x332/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [scrup+81/174] scrup+0x51/0xae
        Apr  5 20:24:57 localhost kernel:  [vgacon_cursor+307/314]
        vgacon_cursor+0x133/0x13a
        Apr  5 20:24:57 localhost kernel:  [set_cursor+78/91]
        set_cursor+0x4e/0x5b
        Apr  5 20:24:57 localhost kernel:  [vt_console_print+523/540]
        vt_console_print+0x20b/0x21c
        Apr  5 20:24:57 localhost kernel: 
        [__call_console_drivers+55/69] __call_console_drivers+0x37/0x45
        Apr  5 20:24:57 localhost kernel: 
        [call_console_drivers+226/234] call_console_drivers+0xe2/0xea
        Apr  5 20:24:57 localhost kernel:  [vprintk+467/494]
        vprintk+0x1d3/0x1ee
        Apr  5 20:24:57 localhost kernel:  [__make_request+1020/1068]
        __make_request+0x3fc/0x42c
        Apr  5 20:24:57 localhost kernel:  [pg0+140346943/1070617600]
        rswap_send+0x6c/0x88 [rswap]
        Apr  5 20:24:57 localhost kernel:  [pg0+140347045/1070617600]
        request_dd+0x4a/0x71 [rswap]
        Apr  5 20:24:57 localhost kernel:  [blk_remove_plug+70/80]
        blk_remove_plug+0x46/0x50
        Apr  5 20:24:57 localhost kernel:  [sync_page+0/61]
        sync_page+0x0/0x3d
        Apr  5 20:24:57 localhost kernel:  [generic_unplug_device+10/13]
        generic_unplug_device+0xa/0xd
        Apr  5 20:24:57 localhost kernel:  [block_sync_page+53/58]
        block_sync_page+0x35/0x3a
        Apr  5 20:24:57 localhost kernel:  [sync_page+52/61]
        sync_page+0x34/0x3d
        Apr  5 20:24:57 localhost kernel:  [__wait_on_bit_lock+43/81]
        __wait_on_bit_lock+0x2b/0x51
        Apr  5 20:24:57 localhost kernel:  [__lock_page+84/90]
        __lock_page+0x54/0x5a
        Apr  5 20:24:57 localhost kernel:  [wake_bit_function+0/52]
        wake_bit_function+0x0/0x34
        Apr  5 20:24:57 localhost kernel:  [read_cache_page+198/271]
        read_cache_page+0xc6/0x10f
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [read_dev_sector+44/131]
        read_dev_sector+0x2c/0x83
        Apr  5 20:24:57 localhost kernel:  [blkdev_readpage+0/21]
        blkdev_readpage+0x0/0x15
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+30/263]
        parse_solaris_x86+0x1e/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [msdos_partition+514/596]
        msdos_partition+0x202/0x254
        Apr  5 20:24:57 localhost kernel:  [check_partition+136/204]
        check_partition+0x88/0xcc
        Apr  5 20:24:57 localhost kernel:  [rescan_partitions+97/166]
        rescan_partitions+0x61/0xa6
        Apr  5 20:24:57 localhost kernel:  [blkdev_reread_part+73/97]
        blkdev_reread_part+0x49/0x61
        Apr  5 20:24:57 localhost kernel:  [blkdev_ioctl+250/297]
        blkdev_ioctl+0xfa/0x129
        Apr  5 20:24:57 localhost kernel:  [block_ioctl+26/30]
        block_ioctl+0x1a/0x1e
        Apr  5 20:24:57 localhost kernel:  [do_ioctl+33/86]
        do_ioctl+0x21/0x56
        Apr  5 20:24:57 localhost kernel:  [vfs_ioctl+348/363]
        vfs_ioctl+0x15c/0x16b
        Apr  5 20:24:57 localhost kernel:  [sys_ioctl+43/70]
        sys_ioctl+0x2b/0x46
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75
        Apr  5 20:24:57 localhost kernel: Badness in local_bh_enable at
        kernel/softirq.c:140
        Apr  5 20:24:57 localhost kernel:  [local_bh_enable+37/92]
        local_bh_enable+0x25/0x5c
        Apr  5 20:24:57 localhost kernel: 
        [inet_wait_for_connect+76/163] inet_wait_for_connect+0x4c/0xa3
        Apr  5 20:24:57 localhost kernel: 
        [autoremove_wake_function+0/58] autoremove_wake_function+0x0/0x3a
        Apr  5 20:24:57 localhost kernel:  [inet_stream_connect+191/324]
        inet_stream_connect+0xbf/0x144
        Apr  5 20:24:57 localhost kernel:  [pg0+140346179/1070617600]
        remote_send_swap+0xad/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [printk+18/22] printk+0x12/0x16
        Apr  5 20:24:57 localhost kernel:  [pg0+140346824/1070617600]
        remote_send_swap+0x332/0x33d [rswap]
        Apr  5 20:24:57 localhost kernel:  [scrup+81/174] scrup+0x51/0xae
        Apr  5 20:24:57 localhost kernel:  [vgacon_cursor+307/314]
        vgacon_cursor+0x133/0x13a
        Apr  5 20:24:57 localhost kernel:  [set_cursor+78/91]
        set_cursor+0x4e/0x5b
        Apr  5 20:24:57 localhost kernel:  [vt_console_print+523/540]
        vt_console_print+0x20b/0x21c
        Apr  5 20:24:57 localhost kernel: 
        [__call_console_drivers+55/69] __call_console_drivers+0x37/0x45
        Apr  5 20:24:57 localhost kernel: 
        [call_console_drivers+226/234] call_console_drivers+0xe2/0xea
        Apr  5 20:24:57 localhost kernel:  [vprintk+467/494]
        vprintk+0x1d3/0x1ee
        Apr  5 20:24:57 localhost kernel:  [__make_request+1020/1068]
        __make_request+0x3fc/0x42c
        Apr  5 20:24:57 localhost kernel:  [pg0+140346943/1070617600]
        rswap_send+0x6c/0x88 [rswap]
        Apr  5 20:24:57 localhost kernel:  [pg0+140347045/1070617600]
        request_dd+0x4a/0x71 [rswap]
        Apr  5 20:24:57 localhost kernel:  [blk_remove_plug+70/80]
        blk_remove_plug+0x46/0x50
        Apr  5 20:24:57 localhost kernel:  [sync_page+0/61]
        sync_page+0x0/0x3d
        Apr  5 20:24:57 localhost kernel:  [generic_unplug_device+10/13]
        generic_unplug_device+0xa/0xd
        Apr  5 20:24:57 localhost kernel:  [block_sync_page+53/58]
        block_sync_page+0x35/0x3a
        Apr  5 20:24:57 localhost kernel:  [sync_page+52/61]
        sync_page+0x34/0x3d
        Apr  5 20:24:57 localhost kernel:  [__wait_on_bit_lock+43/81]
        __wait_on_bit_lock+0x2b/0x51
        Apr  5 20:24:57 localhost kernel:  [__lock_page+84/90]
        __lock_page+0x54/0x5a
        Apr  5 20:24:57 localhost kernel:  [wake_bit_function+0/52]
        wake_bit_function+0x0/0x34
        Apr  5 20:24:57 localhost kernel:  [read_cache_page+198/271]
        read_cache_page+0xc6/0x10f
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [read_dev_sector+44/131]
        read_dev_sector+0x2c/0x83
        Apr  5 20:24:57 localhost kernel:  [blkdev_readpage+0/21]
        blkdev_readpage+0x0/0x15
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+30/263]
        parse_solaris_x86+0x1e/0x107
        Apr  5 20:24:57 localhost kernel:  [parse_solaris_x86+0/263]
        parse_solaris_x86+0x0/0x107
        Apr  5 20:24:57 localhost kernel:  [msdos_partition+514/596]
        msdos_partition+0x202/0x254
        Apr  5 20:24:57 localhost kernel:  [check_partition+136/204]
        check_partition+0x88/0xcc
        Apr  5 20:24:57 localhost kernel:  [rescan_partitions+97/166]
        rescan_partitions+0x61/0xa6
        Apr  5 20:24:57 localhost kernel:  [blkdev_reread_part+73/97]
        blkdev_reread_part+0x49/0x61
        Apr  5 20:24:57 localhost kernel:  [blkdev_ioctl+250/297]
        blkdev_ioctl+0xfa/0x129
        Apr  5 20:24:57 localhost kernel:  [block_ioctl+26/30]
        block_ioctl+0x1a/0x1e
        Apr  5 20:24:57 localhost kernel:  [do_ioctl+33/86]
        do_ioctl+0x21/0x56
        Apr  5 20:24:57 localhost kernel:  [vfs_ioctl+348/363]
        vfs_ioctl+0x15c/0x16b
        Apr  5 20:24:57 localhost kernel:  [sys_ioctl+43/70]
        sys_ioctl+0x2b/0x46
        Apr  5 20:24:57 localhost kernel:  [sysenter_past_esp+84/117]
        sysenter_past_esp+0x54/0x75

I don't find any pattern that causes this log,
My kernel is 2.6.15. Someone knows what is the error, or something that
could help me to find it??
thanks in advance

jordi  




^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: Badness in local_bh_enable at kernel/softirq.c:140 with inet_stream
  2006-04-06 17:18 Badness in local_bh_enable at kernel/softirq.c:140 with inet_stream jordi Vaquero
@ 2006-04-06 17:59 ` linux-os (Dick Johnson)
  0 siblings, 0 replies; 3+ messages in thread
From: linux-os (Dick Johnson) @ 2006-04-06 17:59 UTC (permalink / raw)
  To: jordi Vaquero; +Cc: Linux kernel


On Thu, 6 Apr 2006, jordi Vaquero wrote:

> Hello
>
> I'm trying to make a Linux Kernel module. My module has a network
> comunication with sockets, I use the functions like this skeleton,
>
>            sd = sock_create(AF_INET,SOCK_STREAM,IPPROTO_TCP,&sock);
>                if(sd<0){
>                printk(KERN_ERR "Error\n");
>            }else{
>                sout.sin_family = AF_INET;
>                err = inet_aton("172.16.151.1",&sout.sin_addr); //this
>        function works well, I implemented it.
>                sout.sin_port = htons(20000);
>                sd = sock->ops->connect(sock,(struct sockaddr*)&sout,
>        sizeof(sout),O_RDWR);
>                if(sd<0){
>                    printk(KERN_ERR "Error \n");
>                    sock_release(sock);
>                }else{
>                     USE SENDMSG and RECVMSG
>                        ...
>                        ...
>                        ...
>                   sock_release(sock);
>                }
>
> My problem is that sometimes, at some point near the connect function, a
> warning is launched and dmesg shows this:
>
[SNIPPED... Crap]

This has become a FAQ...
If you need to do this INSIDE the kernel, you need to do it from
a kernel thread. Otherwise, your socket is indistinguishable
from somebody else's open file descriptor. A file descriptor needs
a CONTEXT! The kernel doesn't have a CONTEXT! You need a process
to have a context, either a kernel thread or a user-mode task.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.15.4 on an i686 machine (5589.42 BogoMips).
Warning : 98.36% of all statistics are fiction, book release in April.
_
\x1a\x04

****************************************************************
The information transmitted in this message is confidential and may be privileged.  Any review, retransmission, dissemination, or other use of this information by persons or entities other than the intended recipient is prohibited.  If you are not the intended recipient, please notify Analogic Corporation immediately - by replying to this message or by sending an email to DeliveryErrors@analogic.com - and destroy all copies of this information, including any attachments, without reading or disclosing them.

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^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: Badness in local_bh_enable at kernel/softirq.c:140 with inet_stream
@ 2006-04-17 17:23 jordi Vaquero
  0 siblings, 0 replies; 3+ messages in thread
From: jordi Vaquero @ 2006-04-17 17:23 UTC (permalink / raw)
  To: linux-kernel


Hello,
First of all, thanks for reply me, but I'm so sorry I not understand
your advice. I'm trying to do a disk driver that connect with a server
using tcp/ip sockets.
I don't understand why the context is the problem I have.
I'm looking for it deeply and I find thaht local_bh_enable is used in
networks, scsi drivers for enable bottom halves.
Sorry if this its in  FAQs, but I don't find it.
Thanks for advance
jordi


On 4/6/06, *linux-os (Dick Johnson)* <linux-os@analogic.com
<mailto:linux-os@analogic.com>> wrote:


    On Thu, 6 Apr 2006, jordi Vaquero wrote:

    > Hello
    >
    > I'm trying to make a Linux Kernel module. My module has a network
    > comunication with sockets, I use the functions like this skeleton,
    >
    >            sd = sock_create(AF_INET,SOCK_STREAM,IPPROTO_TCP,&sock);
    >                if(sd<0){
    >                printk(KERN_ERR "Error\n");
    >            }else{
    >                 sout.sin_family = AF_INET;
    >                err = inet_aton("172.16.151.1
    <http://172.16.151.1>",&sout.sin_addr); //this
    >        function works well, I implemented it.
    >                sout.sin_port = htons(20000);
    >                sd = sock->ops->connect(sock,(struct sockaddr*)&sout,
    >        sizeof(sout),O_RDWR);
    >                if(sd<0){
    >                    printk(KERN_ERR "Error \n");
    >                    sock_release(sock);
    >                }else{
    >                     USE SENDMSG and RECVMSG
    >                        ...
    >                        ...
    >                        ...
    >                   sock_release(sock);
    >                }
    >
    > My problem is that sometimes, at some point near the connect
    function, a
    > warning is launched and dmesg shows this:
    >
    [SNIPPED... Crap]

    This has become a FAQ...
    If you need to do this INSIDE the kernel, you need to do it from
    a kernel thread. Otherwise, your socket is indistinguishable
    from somebody else's open file descriptor. A file descriptor needs
    a CONTEXT! The kernel doesn't have a CONTEXT! You need a process
    to have a context, either a kernel thread or a user-mode task.

    Cheers,
    Dick Johnson
    Penguin : Linux version 2.6.15.4 <http://2.6.15.4> on an i686
    machine (5589.42 BogoMips).
    Warning : 98.36% of all statistics are fiction, book release in April.
    _
    \x1a\x04

    ****************************************************************
    The information transmitted in this message is confidential and may
    be privileged.  Any review, retransmission, dissemination, or other
    use of this information by persons or entities other than the
    intended recipient is prohibited.  If you are not the intended
    recipient, please notify Analogic Corporation immediately - by
    replying to this message or by sending an email to
    DeliveryErrors@analogic.com <mailto:DeliveryErrors@analogic.com> -
    and destroy all copies of this information, including any
    attachments, without reading or disclosing them.

    Thank you.




^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2006-04-17 17:23 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-04-06 17:18 Badness in local_bh_enable at kernel/softirq.c:140 with inet_stream jordi Vaquero
2006-04-06 17:59 ` linux-os (Dick Johnson)
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2006-04-17 17:23 jordi Vaquero

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