Re: [RFC] [PATCH] cpuset operations causes Badness at mm/slab.c:777 warning

[Christoph Lameter <clameter@sgi.com>]

On Fri, 1 Jun 2007, Linus Torvalds wrote:

> No, I don't think you can do it this way.

Ultimately not. But its worth to see if this works.

> At a minimum, you'd need to test that the result is word-aligned. 
> Preferably 8-byte aligned. We literally have stuff that knows about these 
> things and uses the low bits in the pointer to keep extra data.

kmalloc allocations are guaranteed to be aligned to KMALLOC_MINALIGN. I 
can bring that in but it will make the patch less readable.

> Of course, there migth be other (even more subtle) cases where we just 
> assume certain alignment, and depend on the fact that we just _happen_ to 
> get it. Who knows..

I tried to get rid of those cased and I hope that work is complete in 
2.6.22.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/