Re: [RFC 0/3] Slab Defrag / Slab Targeted Reclaim and general SlabAPI changes
From: Christoph Lameter
Date: Sat May 05 2007 - 11:40:38 EST
On Sat, 5 May 2007, Eric Dumazet wrote:
> > Then add ___cacheline_aligned_in_smp or specify the alignment in the various
> > other ways that exist. Practice is that most slabs specify
> > SLAB_HWCACHE_ALIGN. So most slabs are cache aligned today.
>
> Yes but this alignement is dynamic, not at compile time.
>
> include/asm-i386/processor.h:739:#define cache_line_size()
> (boot_cpu_data.x86_cache_alignment)
Ahh.. I did not see that before.
> So adding ____cacheline_aligned to 'struct file' for example would be a
> regression for people with PII or PIII
Yuck.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/