Oleg <[email protected]> writes:
> [1.] kmem_cache_create: duplicate cache fat_cache
> [2.] When I load module vfat, I'm have BUG. vfat is embedded in my kernel.
> [3.] modules
> [4.] Linux version 2.6.12-rc3-mm3 ([email protected]) (gcc version
> 3.3.2 20031022 (Red Hat Linux 3.3.2-1)) #18 SMP
> [5.] kmem_cache_create: duplicate cache fat_cache
> ------------[ cut here ]------------
> kernel BUG at mm/slab.c:1491!
> invalid operand: 0000 [#1]
> PREEMPT SMP
> Modules linked in: fat nls_utf8 nls_cp866 nls_cp855 video hotkey
> CPU: 0
> EIP: 0060:[<c014a38f>] Not tainted VLI
> EFLAGS: 00010202 (2.6.12-rc3-mm3)
> EIP is at kmem_cache_create+0x45f/0x5e0
> eax: 00000030 ebx: f7d187b4 ecx: 0000000d edx: 00000202
> esi: c03c91ef edi: f885ed6e ebp: f7de1580 esp: f74d1f44
> ds: 007b es: 007b ss: 0068
> Process modprobe (pid: 2487, threadinfo=f74d0000 task=f7eef090)
> Stack: c03c6f80 f885ed64 00000004 00020000 f74d1f6c f7de15d8 000000a9 c0000000
> fffffffc 00000004 00000010 f8862540 00000000 0804e130 f74d0000 f8806037
> f885ed64 00000014 00000000 00020000 f8857000 00000000 f88060e5 c013a8f4
> Call Trace:
> [<f8806037>] fat_cache_init+0x37/0x80 [fat]
> [<f8857000>] init_once+0x0/0x20 [fat]
> [<f88060e5>] init_fat_fs+0x5/0xc [fat]
> [<c013a8f4>] sys_init_module+0x124/0x1a0
> [<c0103175>] syscall_call+0x7/0xb
> Code: 00 04 00 74 ec e9 8a 01 00 00 8b 4c 24 40 c7 04 24 80 6f 3c c0 89 4c 24
> 04 e8 4e 44 fd ff f0 ff 05 ac d2 50 c0 0f 8e 73 1a 00 00 <0f> 0b d3 05 95 65
> 3c c0 8b 0b e9 65 ff ff ff 8b 47 50 c7 04 24
[...]
> [7.7.] module vfat && embedded vfat normal situation, and I'm don't like BUG
> in my dmesg... Sorry, I'm from Russia.
Ummm... why is this normal situation? Didn't you run the
modules_install after changed .config? Anyway, this patch returns
NULL instead of calling BUG(). This case seems to also happen with
user error.
Manfred, what do you think of this?
--
OGAWA Hirofumi <[email protected]>
Signed-off-by: OGAWA Hirofumi <[email protected]>
---
mm/slab.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff -puN mm/slab.c~slab-dont-call-bug mm/slab.c
--- linux-2.6.12-rc4/mm/slab.c~slab-dont-call-bug 2005-05-20 02:37:21.000000000 +0900
+++ linux-2.6.12-rc4-hirofumi/mm/slab.c 2005-05-20 02:39:42.000000000 +0900
@@ -1482,8 +1482,10 @@ next:
printk("kmem_cache_create: duplicate cache %s\n",name);
up(&cache_chain_sem);
unlock_cpu_hotplug();
- BUG();
- }
+ set_fs(old_fs);
+ cachep = NULL;
+ goto oops;
+ }
}
set_fs(old_fs);
}
_
-
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