On Thu, 11 Jan 2007 14:45:12 +0800 Aubrey <[EMAIL PROTECTED]> wrote: > > > > In the interim you could do the old "echo 3 > /proc/sys/vm/drop_caches" > > thing, but that's terribly crude - drop_caches is really only for debugging > > and benchmarking. > > > Yes. This method can drop caches, but will fragment memory.
That's what page reclaim will do as well. What you want is Mel's antifragmentation work, or lumpy reclaim. > This is > not what I want. I want cache is limited to a tunable value of the > whole memory. For example, if total memory is 128M, is there a way to > trigger reclaim when cache size > 16M? If there was, it'd "fragment memory" as well. You might get a little benefit from increasing /proc/sys/vm/min_free_kbytes, but not much. Some page allocation tweaks would aid that. But basically, to do this well, serious work is needed. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
