[Ocfs2-devel] [PATCH] ocfs2: Simplify ocfs2_invalidatepage() and ocfs2_releasepage()
Jan Kara
jack at suse.cz
Fri Dec 21 17:41:43 PST 2012
On Fri 21-12-12 17:33:21, Joel Becker wrote:
> On Sat, Dec 22, 2012 at 12:26:35AM +0100, Jan Kara wrote:
> > Ocfs2 doesn't do data journalling. Thus its ->invalidatepage and ->releasepage
> > functions never get called on buffers that have journal heads attached. So
> > just use standard variants of functions from buffer.c.
>
> Indeed, we do not. I suppose if we ever use readpage, etc for our
> dirblocks we'll have to revisit this.
Depends on how exactly you do that but probably yes. OTOH there will be
separate a_ops for directories anyway I assume...
> Do you want me to send this along?
Yes, please. Sign-off from a maintainer is good ;)
Honza
> > Signed-off-by: Jan Kara <jack at suse.cz>
> > ---
> > fs/ocfs2/aops.c | 18 ++----------------
> > 1 files changed, 2 insertions(+), 16 deletions(-)
> >
> > diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
> > index 6577432..6166cdd 100644
> > --- a/fs/ocfs2/aops.c
> > +++ b/fs/ocfs2/aops.c
> > @@ -598,25 +598,11 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
> > inode_dio_done(inode);
> > }
> >
> > -/*
> > - * ocfs2_invalidatepage() and ocfs2_releasepage() are shamelessly stolen
> > - * from ext3. PageChecked() bits have been removed as OCFS2 does not
> > - * do journalled data.
> > - */
> > -static void ocfs2_invalidatepage(struct page *page, unsigned long offset)
> > -{
> > - journal_t *journal = OCFS2_SB(page->mapping->host->i_sb)->journal->j_journal;
> > -
> > - jbd2_journal_invalidatepage(journal, page, offset);
> > -}
> > -
> > static int ocfs2_releasepage(struct page *page, gfp_t wait)
> > {
> > - journal_t *journal = OCFS2_SB(page->mapping->host->i_sb)->journal->j_journal;
> > -
> > if (!page_has_buffers(page))
> > return 0;
> > - return jbd2_journal_try_to_free_buffers(journal, page, wait);
> > + return try_to_free_buffers(page);
> > }
> >
> > static ssize_t ocfs2_direct_IO(int rw,
> > @@ -2091,7 +2077,7 @@ const struct address_space_operations ocfs2_aops = {
> > .write_end = ocfs2_write_end,
> > .bmap = ocfs2_bmap,
> > .direct_IO = ocfs2_direct_IO,
> > - .invalidatepage = ocfs2_invalidatepage,
> > + .invalidatepage = block_invalidatepage,
> > .releasepage = ocfs2_releasepage,
> > .migratepage = buffer_migrate_page,
> > .is_partially_uptodate = block_is_partially_uptodate,
> > --
> > 1.7.1
> >
>
> --
>
> "But then she looks me in the eye
> And says, 'We're going to last forever,'
> And man you know I can't begin to doubt it.
> Cause it just feels so good and so free and so right,
> I know we ain't never going to change our minds about it, Hey!
> Here comes my girl."
>
> http://www.jlbec.org/
> jlbec at evilplan.org
--
Jan Kara <jack at suse.cz>
SUSE Labs, CR
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