Re: [patch 10/21] buffer heads: Support slab defrag

From: Christoph Lameter
Date: Mon May 19 2008 - 12:44:31 EST

On Mon, 19 May 2008, David Chinner wrote:

> Defragmentation is triggered as part of the usual memory reclaim
> process. Which implies we've run out of free memory, correct?

Yes but we have already reclaimed some memory.

> > How do you trigger such a special writeout?
> filemap_fdatawrite_range() perhaps?

Could you provide me such a patch? I would not know how much to writeout.
If we had such a method then we could also use that for the swap case
where we also write out single pages?
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at