On Thu, 31 Oct 2002, Christoph Hellwig wrote:
> On Thu, Oct 31, 2002 at 07:24:40PM +0300, Nikita Danilov wrote:
> > Reiser4 stores meta-data in a huge balanced tree. This tree is kept
> > (partially) in the page cache. All pages in this tree are attached to
> > "fake" inode. Sometimes you need to remove node from the tree. At this
> > moment page has to be removed from the fake inode mapping.
>
> What about chaing truncate_inode_pages to take an additional len
> argument so you don't have to remove all pages past an offset?
Actually, we may want that for other reasons anyway. In particular, I can
well imagine why a networked filesystem in particular might want to
invalidate a range of a file cache, but not necessarily all of it.
(Yeah, I don't know of any network filesystem that does invalidation on
anything but a file granularity, but I assume such filesystems have to
exist. Especially in cluster environments it sounds like a sane thing to
do invalidates on a finer granularity)
Linus
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This archive was generated by hypermail 2b29 : Thu Oct 31 2002 - 22:00:55 EST