lkml.org 
[lkml]   [2020]   [Mar]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH RFC v2 12/24] hpsa: use reserved commands
From
Date
On 3/17/20 10:38 AM, John Garry wrote:
> On 11/03/2020 08:10, Ming Lei wrote:
>>> ands(struct ctlr_info *h)
>>> @@ -5803,6 +5803,7 @@ static int hpsa_scsi_host_alloc(struct
>>> ctlr_info *h)
>>>       sh->max_lun = HPSA_MAX_LUN;
>>>       sh->max_id = HPSA_MAX_LUN;
>>>       sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
>>> +    sh->nr_reserved_cmds = HPSA_NRESERVED_CMDS;
>> Now .nr_reserved_cmds has been passed to blk-mq, you need to increase
>> sh->can_queue to h->nr_cmds, because .can_queue is the whole queue depth
>> (include the part of reserved tags), otherwise, IO tags will be
>> decreased.
>>
>
> Sounds correct.
>
I will have having a look at the patchset; I thought I did a patch to
modify .can_queue so that it would cover only the usable tags, not the
reserved ones.

Cheers,

Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@suse.de +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer

\
 
 \ /
  Last update: 2020-03-17 10:49    [W:0.455 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site