Re: [BLOCK] bh: Ensure bh fits within a page

From: Herbert Xu
Date: Tue Aug 01 2006 - 07:08:54 EST

On Mon, Jul 31, 2006 at 10:54:54PM -0700, Andrew Morton wrote:
> Crap, that's hard to fix. Am I allowed to blame submit_bh()? ;)

Sure you're allowed to do anything :)

> uhm, we don't want to lose kmalloc redzoning, so I guess we need to create
> on-demand ext3-private slab caches for 1024, 2048, and 4096 bytes. With
> the appropriate slab flags to defeat the redzoning.

Either that or we should fix redzoning so that it actually preserves
alignment, rather than turning off debugging whenever we want alignment.
Basically it means that we need to use twice the amount of memory for
each object (so 2K for each 1K object). Is this acceptable for debugging?

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