Messages in this thread | | | Subject | Re: [patch 00/14] remap_file_pages protection support | From | Arjan van de Ven <> | Date | Tue, 02 May 2006 12:21:06 +0200 |
| |
> This will be useful since the VMA lookup at fault time can be a bottleneck for > some programs (I've received a report about this from Ulrich Drepper and I've > been told that also Val Henson from Intel is interested about this).
I've not seen much of this if any at all, the various caches that are in place for these lookups seem to function quite well; what we did see was glibc's malloc implementation being mistuned resulting in far too many mmaps than needed (which in turn leads to far too much page zeroing which is the really expensive part. It's not the vma lookup that is expensive, it's the page zeroing)
- 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/
| |