On Sat, Sep 25, 2010 at 05:36:38PM +0800, Wengang Wang wrote:
> On 10-09-14 15:50, Sunil Mushran wrote:
> > In global heartbeat mode, we have a upper limit for the number of active
> > regions.
> > This patch adds the facility to track the number of active global heartbeat
> > regions and fails to start heartbeat if the number exceeds the maximum.
> >
> > Signed-of-by: Sunil Mushran <[email protected]>
> > ---
> > fs/ocfs2/cluster/heartbeat.c | 24 ++++++++++++++++++++++--
> > 1 files changed, 22 insertions(+), 2 deletions(-)
> >
> > diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
> > index 29b5c70..57c906b 100644
> > --- a/fs/ocfs2/cluster/heartbeat.c
> > +++ b/fs/ocfs2/cluster/heartbeat.c
> > @@ -62,6 +62,12 @@ static unsigned long
> > o2hb_live_node_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
> > static LIST_HEAD(o2hb_node_events);
> > static DECLARE_WAIT_QUEUE_HEAD(o2hb_steady_queue);
> >
> > +/*
> > + * In global heartbeat, we maintain a series of region bitmaps.
> > + * - o2hb_region_bitmap allows us to limit the region number to
> > max region.
> > + */
> > +static unsigned long o2hb_region_bitmap[BITS_TO_LONGS(O2NM_MAX_REGIONS)];
> > +
> > #define O2HB_DB_TYPE_LIVENODES 0
> > struct o2hb_debug_buf {
> > int db_type;
> > @@ -176,6 +182,7 @@ struct o2hb_region {
> >
> > /* live node map of this region */
> > unsigned long
> > hr_live_node_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
> > + unsigned int hr_region_num;
>
> I don't remember clear the value for O2NM_MAX_REGIONS, 32? Will
> u8 be better than "unsigned int"?
It's not an on-disk structure. There's no need to enforce the
size.
Joel
--
Life's Little Instruction Book #173
"Be kinder than necessary."
Joel Becker
Consulting Software Developer
Oracle
E-mail: [email protected]
Phone: (650) 506-8127
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