[dm-devel] [PATCH 2/2] dm-multipath: reduce memory pressure during requeuing
Hannes Reinecke
hare at suse.de
Mon Jan 20 12:15:09 UTC 2014
On 01/20/2014 12:59 PM, Junichi Nomura wrote:
> On 01/17/14 19:42, Hannes Reinecke wrote:
>> @@ -908,19 +910,9 @@ static void multipath_dtr(struct dm_target *ti)
>> static int multipath_map(struct dm_target *ti, struct request *clone,
>> union map_info *map_context)
>> {
>> - int r;
>> struct multipath *m = (struct multipath *) ti->private;
>>
>> - if (set_mapinfo(m, map_context) < 0)
>> - /* ENOMEM, requeue */
>> - return DM_MAPIO_REQUEUE;
>> -
>> - clone->cmd_flags |= REQ_FAILFAST_TRANSPORT;
>> - r = map_io(m, clone, map_context);
>> - if (r < 0 || r == DM_MAPIO_REQUEUE)
>> - clear_mapinfo(m, map_context);
>> -
>> - return r;
>> + return map_io(m, clone, map_context);
>> }
>
> Now multipath_map() is the only caller of map_io() and
> most part of multipath_map() is moved to map_io(),
> there is no reason to separate those functions.
> You could fold map_io() into multipath_map().
>
Yes, I could.
However, I didn't do so (for this patchset)
as this would make reviewing harder.
But yeah, it should be merged.
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare at suse.de +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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