2001-04-17 21:36:14

by Jeff V. Merkey

[permalink] [raw]
Subject: BUG() at line 804, slab.c, 2.4.3



I noticed that subsequent calls to kmem_cache_create with the same name
does not return an -EEXIST return code, but instead barfs and crashes
with a bug at slab.c line 804. This occurs in 2.4.3.

Is this the expected behavior for kmem_cache_create? I am using
the slab allocator to create and maintain buffer head chains for
asynch I/O.

I would assume that if a valid tag existed, an error would be returned
rather than the system crashing. I see the problem unloading then
reloading the module on 2.4.3.

Thanks,

Jeff


2001-04-17 21:59:47

by Jeff V. Merkey

[permalink] [raw]
Subject: Re: BUG() at line 804, slab.c, 2.4.3

On Tue, Apr 17, 2001 at 03:29:20PM -0600, Jeff V. Merkey wrote:

Added kmem_cache_destroy() to get around the problem. I'm still
curious as to why we need to panic at this point rather than return
an error.

Thanks

Jeff

>
>
> I noticed that subsequent calls to kmem_cache_create with the same name
> does not return an -EEXIST return code, but instead barfs and crashes
> with a bug at slab.c line 804. This occurs in 2.4.3.
>
> Is this the expected behavior for kmem_cache_create? I am using
> the slab allocator to create and maintain buffer head chains for
> asynch I/O.
>
> I would assume that if a valid tag existed, an error would be returned
> rather than the system crashing. I see the problem unloading then
> reloading the module on 2.4.3.
>
> Thanks,
>
> Jeff
> -
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