Messages in this thread |  | | From | Daniel Phillips <> | Subject | Re: invalidate_inode_pages in 2.5.32/3 | Date | Tue, 10 Sep 2002 18:57:01 +0200 |
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On Tuesday 10 September 2002 00:32, Andrew Morton wrote: > Daniel Phillips wrote: > > > > > > void invalidate_inode_pages(struct inode *inode) > > > > { > > > > truncate_inode_pages(mapping, 0); > > > > } > > > > > > > > Is it any harder than that? > > > > > > Pretty much - need to leave i_size where it was. > > > > This doesn't touch i_size. > > Sorry - I was thinking vmtruncate(). truncate_inode_pages() would > result in all the mmapped pages becoming out-of-date anonymous > memory. NFS needs to take down the pagetables so that processes > which are mmapping the file which changed on the server will take > a major fault and read a fresh copy. I believe.
Oh, um. Yes, we need the additional pte zapping behaviour of vmtruncate_list. It doesn't look particularly hard to produce a variant of vmtruncation that does (doesn't do) what you suggest. Let's see how the discussion goes with the NFS crowd.
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