Messages in this thread | | | Date | Fri, 02 Aug 2002 13:20:37 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] Rmap speedup |
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Daniel Phillips wrote: > > This patch eliminates about 35% of the raw rmap setup/teardown overhead by > adopting a new locking interface that allows the add_rmaps to be batched in > copy_page_range.
Well that's fairly straightforward, thanks. Butt-ugly though ;)
Don't bother doing teardown yet. I have patches which batch all the zap_page_range activity into 16-page chunks, so we eventually end up in a single function with 16 virtually-contiguous pages to release. Adding the batched locking to that will be simple.
Sigh. I have a test which sends the 2.5.30 VM into a five-minute coma and which immediately panics latest -ac with pte_chain oom. Remind me again why all this is worth it?
I'll port your stuff to 2.5 over the weekend, let you know... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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