usb-storage doesn't directly create any slab caches.  Most likely, this
crash is caused as a side-effect of a forced rmmod.

Matt

On Sat, Jul 31, 2004 at 07:31:21PM -0700, Andrew Morton wrote:
> 
> Is this now fixed?  usb-storage in 2.6.7 is trying to create the
> scsi_cmd_cache slab cache,  but it already exists.
> 
> 
> Begin forwarded message:
> 
> Date: Sat, 31 Jul 2004 22:30:39 +0200
> From: willy discart <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: using usb storage
> 
> 
> 
> 
> Ran into the following problem :
> 
> 
> Using rsync to copy files to usb storage:
> 
> usr/X11R6/
> usr/X11R6/ATI.2.TIMESTAMP
> usr/X11R6/README.ati.2
> usr/X11R6/bin/
> usr/X11R6/bin/X
> usr/X11R6/bin/XFree86
> rsync: writefd_unbuffered failed to write 4 bytes: phase "unknown": 
> Broken pipe
> rsync error: error in rsync protocol data stream (code 12) at io.c(839)
> rsync: writefd_unbuffered failed to write 69 bytes: phase "unknown": 
> Broken pipe
> rsync error: error in rsync protocol data stream (code 12) at io.c(839)
> 
> 
> umount /disk
> rmmod -v -f usb_storage
> rmmod usb_storage, wait=no force
> 
> disconnect the usb storage, reconnect again :
> 
> usb 1-2.1: adding 1-2.1:1.0 (config #1, interface 0)
> usb 1-2.1:1.0: hotplug
> Initializing USB Mass Storage driver...
> usb-storage 1-2.1:1.0: usb_probe_interface
> usb-storage 1-2.1:1.0: usb_probe_interface - got id
> kmem_cache_create: duplicate cache scsi_cmd_cache
> ------------[ cut here ]------------
> kernel BUG at mm/slab.c:1392!
> invalid operand: 0000 [#1]
> PREEMPT
> Modules linked in: usb_storage ds binfmt_misc thermal fan button 
> processor ac        pro100 usbhid uhci_hcd usbcore yenta_socket 
> pcmcia_core sd_mod battery snd_int       8x0 snd_ac97_codec snd_pcm_oss 
> snd_mixer_oss snd_pcm snd_timer snd_page_alloc        d_mpu401_uart 
> snd_rawmidi snd_seq_device snd
> CPU:    0
> EIP:    0060:[<c0135124>]    Not tainted
> EFLAGS: 00010202   (2.6.7)
> EIP is at kmem_cache_create+0x3f4/0x5a0
> eax: 00000032   ebx: c13bea50   ecx: c03c0d8c   edx: c031e838
> esi: c02f5437   edi: c02f5437   ebp: c466de0c   esp: c466ddd8
> ds: 007b   es: 007b   ss: 0068
> Process modprobe (pid: 2423, threadinfo=c466c000 task=c95948d0)
> Stack: c02e7e40 c02f5428 00000020 00002000 c466ddfc c13be99c c0000000 
> ffffffe0
>        c13be960 000000a0 cfe0e600 c0364440 cfe0e60c c466de38 c024e863 
> c02f5428
>        00000160 00000020 00002000 00000000 00000000 000001d8 cfe0e600 
> d08bd820
> Call Trace:
>  [<c01047ef>] show_stack+0x7f/0xa0
>  [<c0104996>] show_registers+0x156/0x1b0
>  [<c0104b39>] die+0x89/0x100
>  [<c0104f25>] do_invalid_op+0xb5/0xc0
>  [<c0104475>] error_code+0x2d/0x38
>  [<c024e863>] scsi_setup_command_freelist+0x83/0x110
>  [<c024f934>] scsi_host_alloc+0x1b4/0x2c0
>  [<d08ba957>] usb_stor_acquire_resources+0xc7/0x130 [usb_storage]
>  [<d08bac71>] storage_probe+0xf1/0x190 [usb_storage]
>  [<d08f20db>] usb_probe_interface+0xbb/0xc0 [usbcore]
>  [<c021e9fd>] bus_match+0x3d/0x70
>  [<c021eb3c>] driver_attach+0x5c/0xa0
>  [<c021ee55>] bus_add_driver+0xa5/0xc0
>  [<c021f301>] driver_register+0x31/0x40
>  [<d08f219f>] usb_register+0x3f/0xa0 [usbcore]
>  [<d0924021>] usb_stor_init+0x21/0x3c [usb_storage]
>  [<c012aa05>] sys_init_module+0x135/0x280
>  [<c01042cb>] syscall_call+0x7/0xb
> 
> Code: 0f 0b 70 05 8c 76 2e c0 8b 0b e9 56 ff ff ff 8b 47 34 c7 04
> 
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-- 
Matthew Dharm                              Home: [EMAIL PROTECTED] 
Maintainer, Linux USB Mass Storage Driver

I'm just trying to think of a way to say "up yours" without getting fired.
                                        -- Stef
User Friendly, 10/8/1998

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