Re: [PATCH 5/6] block: permit I/O to vmalloc/vmap kernel pages

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On Wed, 2009-11-18 at 19:10 +0900, FUJITA Tomonori wrote:
> On Tue, 17 Nov 2009 11:03:51 -0600
> James Bottomley <James.Bottomley@xxxxxxx> wrote:
> 
> > This updates bio_map_kern() to check for pages in the vmalloc address
> > range and call the new kernel flushing APIs if the are.  This should
> > allow any kernel user to pass a vmalloc/vmap area to block.
> >
> > Signed-off-by: James Bottomley <James.Bottomley@xxxxxxx>
> > ---
> >  fs/bio.c |   20 ++++++++++++++++++--
> >  1 files changed, 18 insertions(+), 2 deletions(-)
> 
> Do we need this?
> 
> Buffers that xfs_buf.c passes to block doesn't go to bio_map_kern()?

For completeness, yes ... because xfs *should* be passing its buffers to
bio_map_kern() ... it just happens to roll its own.

James



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