Re: i_mapping and i_data question

From: Chris Mason (
Date: Fri Feb 25 2000 - 13:51:41 EST

On Fri, 25 Feb 2000, Tigran Aivazian wrote:

> On Fri, 25 Feb 2000, Chris Mason wrote:
> > Do you want to make sure get_block is called, or do you want to make sure
> > the data in the pages isn't used anymore? If the data in the page is
> > still valid, but the block locations on disk have changed, I think you
> > should be able to use something similar to the unmap_buffer() call in
> > fs/buffer.c.
> >
> > In reiserfs, I'm using this to force a call to get_block for writing to
> > that offset, but allowing the page cache to keep the data for reads.
> suppose for simplicity that I don't care if the valid data in page cache
> gets invalidated (in 0th approximation). Can't I just use
> invalidate_inode_pages(inode) to force get_block() called?

Looks as though invalidate_inode_pages (in 2.3.46) skips over locked
pages, so you would have to be careful with that. Otherwise, I don't see
why not...


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