Messages in this thread | | | Date | Tue, 13 May 2003 16:19:38 -0700 | From | Andrew Morton <> | Subject | Re: [RFC][PATCH] Interface to invalidate regions of mmaps |
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Zach Brown <zab@zabbo.net> wrote: > > so what we'd like most is the ability to invalidate a region of the file > in an efficient go. > > void truncate_inode_pages(struct address_space * mapping, loff_t lstart, > loff_t end) > > that sort of thing.
That's trivial in 2.5.
> this might not suck so bad if the page cache was an > rbtree :)
Or a radix tree.
> but on the other hand, this doesn't solve another problem we have with > opportunistic lock extents and sparse page cache populations. Ideally > we'd like a FS specific pointer in struct page so we can associate pages > in the cache with a lock,
In 2.5, page->buffers was abstracted out to page->private, and is available to filesystems for functions such as this.
> but I can't imagine suggesting such a thing > within earshot of wli.
wli doesn't have to run your kernel. If you want to add a pointer to the pageframe, go add it. But I'd suggest that you do it with a view to migrating it to page->private.
When you finally decide to do your development in a development kernel ;)
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