On Sep 17, 2008 16:26 -0700, Joel Becker wrote:
> + /* We have the actual buffer to go out, fire any commit trigger */
> + /* XXX Checking trigger pointers here so as to skip kmap when
> + * empty */
> + if (jh_in->b_triggers && jh_in->b_triggers->t_commit) {
> + mapped_data = kmap_atomic(new_page, KM_USER0);
> +
> + jbd2_buffer_commit_trigger(jh_in, mapped_data + new_offset);
> + kunmap_atomic(mapped_data, KM_USER0);
> + }
In many cases the kmap will not be needed (i.e. never for ext* because the
metadata buffers will always be allocated in low memory).
> index 8a62d1e..087a1c2 100644
> --- a/include/linux/journal-head.h
> +++ b/include/linux/journal-head.h
> @@ -87,6 +89,9 @@ struct journal_head {
> struct journal_head *b_cpnext, *b_cpprev;
> +
> + /* Trigger type */
> + struct jbd2_buffer_trigger_type *b_triggers;
> };
The journal-head.h header is shared between jbd.h and jbd2.h, so it seems
a bit strange to have a jbd2_* struct here.
Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.
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