Messages in this thread | | | Date | Tue, 15 Apr 2003 07:52:29 +0200 | From | Antonio Vargas <> | Subject | Re: 2.5.67-mm3 |
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On Mon, Apr 14, 2003 at 09:17:59PM -0700, William Lee Irwin III wrote: > On Mon, Apr 14, 2003 at 07:00:57PM -0700, William Lee Irwin III wrote: > > Hence, this "FIXME: do not do for zone highmem". Presumably this is a > > Another FIXME patch: > > > It's a bit of an open question as to how much of a difference this one > makes now, but it says "FIXME". fault_in_pages_writeable() and > fault_in_pages_readable() have a limited "range" with respect to the > size of the region they can prefault; as they are now, they are only > meant to handle spanning a page boundary. This converts them to iterate > over the virtual address range specified and so touch each virtual page > within it once as specified. As per the comment within the "FIXME", > this is only an issue if PAGE_SIZE < PAGE_CACHE_SIZE. > > [patch snip]
Page clustering? I did a simple patch yesterday called "cow-ahead", which may be related: on a write to a COW page, it breaks the COW from several pages at the same time. The implementation survived a complete debian 2.2 boot and a fork bomb. Please have a look. The idea came from a discussion with Martin J. Bligh... we liked the name too much not to implement it.
Greets, Antonio. - 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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