Re: [PATCH/RFC] MM slub: add a sysfs entry to show the calculatednumber of fallback slabs

[Christoph Lameter]

On Fri, 12 Nov 2010, Richard Kennedy wrote:

> On my desktop workloads (kernel compile etc) I'm seeing surprisingly
> little slab fragmentation. Do you have any suggestions for test cases
> that will fragment the memory?

Do a massive scan through huge amounts of files that triggers inode and
dentry reclaim?

> + * Note that this can give the wrong answer if the user has changed the
> + * order of this slab via sysfs.

Not good. Maybe have an additional counter in kmem_cache_node instead?
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