From: Can Guo <cang@codeaurora.org>
To: Avri Altman <avri.altman@wdc.com>
Cc: "James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
gregkh@linuxfoundation.org, Bart Van Assche <bvanassche@acm.org>,
yongmyung lee <ymhungry.lee@samsung.com>,
Daejun Park <daejun7.park@samsung.com>,
alim.akhtar@samsung.com, asutoshd@codeaurora.org,
Zang Leigang <zangleigang@hisilicon.com>,
Avi Shchislowski <avi.shchislowski@wdc.com>,
Bean Huo <beanhuo@micron.com>,
stanley.chu@mediatek.com
Subject: Re: [PATCH v5 05/10] scsi: ufshpb: Region inactivation in host mode
Date: Mon, 15 Mar 2021 15:33:26 +0800 [thread overview]
Message-ID: <57afb2b5d7edda61a40493d8545785b1@codeaurora.org> (raw)
In-Reply-To: <25da7378d5bf4c52443ae9b47f3fd778@codeaurora.org>
On 2021-03-15 12:02, Can Guo wrote:
> On 2021-03-02 21:24, Avri Altman wrote:
>> I host mode, the host is expected to send HPB-WRITE-BUFFER with
>> buffer-id = 0x1 when it inactivates a region.
>>
>> Use the map-requests pool as there is no point in assigning a
>> designated cache for umap-requests.
>>
>> Signed-off-by: Avri Altman <avri.altman@wdc.com>
>> ---
>> drivers/scsi/ufs/ufshpb.c | 14 ++++++++++++++
>> drivers/scsi/ufs/ufshpb.h | 1 +
>> 2 files changed, 15 insertions(+)
>>
>> diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c
>> index 6f4fd22eaf2f..0744feb4d484 100644
>> --- a/drivers/scsi/ufs/ufshpb.c
>> +++ b/drivers/scsi/ufs/ufshpb.c
>> @@ -907,6 +907,7 @@ static int ufshpb_execute_umap_req(struct
>> ufshpb_lu *hpb,
>>
>> blk_execute_rq_nowait(q, NULL, req, 1, ufshpb_umap_req_compl_fn);
>>
>> + hpb->stats.umap_req_cnt++;
>> return 0;
>> }
>>
>> @@ -1103,6 +1104,12 @@ static int ufshpb_issue_umap_req(struct
>> ufshpb_lu *hpb,
>> return -EAGAIN;
>> }
>>
>> +static int ufshpb_issue_umap_single_req(struct ufshpb_lu *hpb,
>> + struct ufshpb_region *rgn)
>> +{
>> + return ufshpb_issue_umap_req(hpb, rgn);
>> +}
>> +
>> static int ufshpb_issue_umap_all_req(struct ufshpb_lu *hpb)
>> {
>> return ufshpb_issue_umap_req(hpb, NULL);
>> @@ -1115,6 +1122,10 @@ static void __ufshpb_evict_region(struct
>> ufshpb_lu *hpb,
>> struct ufshpb_subregion *srgn;
>> int srgn_idx;
>>
>> +
>> + if (hpb->is_hcm && ufshpb_issue_umap_single_req(hpb, rgn))
>
> __ufshpb_evict_region() is called with rgn_state_lock held and IRQ
> disabled,
> when ufshpb_issue_umap_single_req() invokes blk_execute_rq_nowait(),
> below
> warning shall pop up every time, fix it?
>
> void blk_execute_rq_nowait(struct request_queue *q, struct gendisk
> *bd_disk,
> struct request *rq, int at_head,
> rq_end_io_fn *done)
> {
> WARN_ON(irqs_disabled());
> ...
>
Moreover, since we are here with rgn_state_lock held and IRQ disabled,
in ufshpb_get_req(), rq = kmem_cache_alloc(hpb->map_req_cache,
GFP_KERNEL)
has the GFP_KERNEL flag, scheduling while atomic???
Can Guo.
> Thanks.
> Can Guo.
>
>> + return;
>> +
>> lru_info = &hpb->lru_info;
>>
>> dev_dbg(&hpb->sdev_ufs_lu->sdev_dev, "evict region %d\n",
>> rgn->rgn_idx);
>> @@ -1855,6 +1866,7 @@ ufshpb_sysfs_attr_show_func(rb_noti_cnt);
>> ufshpb_sysfs_attr_show_func(rb_active_cnt);
>> ufshpb_sysfs_attr_show_func(rb_inactive_cnt);
>> ufshpb_sysfs_attr_show_func(map_req_cnt);
>> +ufshpb_sysfs_attr_show_func(umap_req_cnt);
>>
>> static struct attribute *hpb_dev_stat_attrs[] = {
>> &dev_attr_hit_cnt.attr,
>> @@ -1863,6 +1875,7 @@ static struct attribute *hpb_dev_stat_attrs[] =
>> {
>> &dev_attr_rb_active_cnt.attr,
>> &dev_attr_rb_inactive_cnt.attr,
>> &dev_attr_map_req_cnt.attr,
>> + &dev_attr_umap_req_cnt.attr,
>> NULL,
>> };
>>
>> @@ -1978,6 +1991,7 @@ static void ufshpb_stat_init(struct ufshpb_lu
>> *hpb)
>> hpb->stats.rb_active_cnt = 0;
>> hpb->stats.rb_inactive_cnt = 0;
>> hpb->stats.map_req_cnt = 0;
>> + hpb->stats.umap_req_cnt = 0;
>> }
>>
>> static void ufshpb_param_init(struct ufshpb_lu *hpb)
>> diff --git a/drivers/scsi/ufs/ufshpb.h b/drivers/scsi/ufs/ufshpb.h
>> index bd4308010466..84598a317897 100644
>> --- a/drivers/scsi/ufs/ufshpb.h
>> +++ b/drivers/scsi/ufs/ufshpb.h
>> @@ -186,6 +186,7 @@ struct ufshpb_stats {
>> u64 rb_inactive_cnt;
>> u64 map_req_cnt;
>> u64 pre_req_cnt;
>> + u64 umap_req_cnt;
>> };
>>
>> struct ufshpb_lu {
next prev parent reply other threads:[~2021-03-15 7:34 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-02 13:24 [PATCH v5 00/10] Add Host control mode to HPB Avri Altman
2021-03-02 13:24 ` [PATCH v5 01/10] scsi: ufshpb: Cache HPB Control mode on init Avri Altman
2021-03-02 13:24 ` [PATCH v5 02/10] scsi: ufshpb: Add host control mode support to rsp_upiu Avri Altman
2021-03-02 13:24 ` [PATCH v5 03/10] scsi: ufshpb: Add region's reads counter Avri Altman
2021-03-11 7:52 ` Can Guo
2021-03-11 8:04 ` Avri Altman
2021-03-11 8:07 ` Can Guo
2021-03-15 3:16 ` Can Guo
2021-03-15 9:20 ` Avri Altman
2021-03-15 9:31 ` Can Guo
2021-03-17 9:19 ` Avri Altman
2021-03-15 8:40 ` Can Guo
2021-03-15 9:22 ` Avri Altman
2021-03-02 13:24 ` [PATCH v5 04/10] scsi: ufshpb: Make eviction depends on region's reads Avri Altman
2021-03-11 7:53 ` Can Guo
2021-03-11 8:06 ` Avri Altman
2021-03-15 8:30 ` Can Guo
2021-03-16 8:34 ` Avri Altman
2021-03-02 13:24 ` [PATCH v5 05/10] scsi: ufshpb: Region inactivation in host mode Avri Altman
2021-03-11 8:20 ` Can Guo
2021-03-11 9:03 ` Avri Altman
2021-03-15 4:02 ` Can Guo
2021-03-15 7:33 ` Can Guo [this message]
2021-03-16 8:30 ` Avri Altman
2021-03-17 1:23 ` Can Guo
[not found] ` <CGME20210316083014epcas2p32d6b84e689cdbe06ee065c870b236d65@epcms2p3>
2021-03-17 2:28 ` Daejun Park
2021-03-17 4:41 ` Can Guo
2021-03-17 7:59 ` Avri Altman
[not found] ` <CGME20210316083014epcas2p32d6b84e689cdbe06ee065c870b236d65@epcms2p4>
2021-03-17 5:19 ` Daejun Park
2021-03-17 5:34 ` Can Guo
[not found] ` <CGME20210316083014epcas2p32d6b84e689cdbe06ee065c870b236d65@epcms2p6>
2021-03-17 5:42 ` Daejun Park
2021-03-02 13:24 ` [PATCH v5 06/10] scsi: ufshpb: Add hpb dev reset response Avri Altman
2021-03-15 1:34 ` Can Guo
2021-03-15 6:40 ` Can Guo
2021-03-15 7:42 ` Avri Altman
2021-03-17 10:56 ` Can Guo
2021-03-17 11:23 ` Avri Altman
2021-03-17 12:12 ` Can Guo
2021-03-17 12:22 ` Avri Altman
2021-03-17 13:50 ` Can Guo
2021-03-17 14:22 ` Avri Altman
2021-03-17 14:36 ` Can Guo
2021-03-17 15:46 ` Avri Altman
2021-03-18 1:00 ` Can Guo
2021-03-18 8:04 ` Avri Altman
2021-03-02 13:25 ` [PATCH v5 07/10] scsi: ufshpb: Add "Cold" regions timer Avri Altman
2021-03-15 1:37 ` Can Guo
2021-03-15 7:54 ` Avri Altman
2021-03-15 9:36 ` Can Guo
2021-03-16 9:21 ` Avri Altman
2021-03-17 2:45 ` Can Guo
2021-03-17 7:55 ` Avri Altman
2021-06-01 16:22 ` Bart Van Assche
2021-03-02 13:25 ` [PATCH v5 08/10] scsi: ufshpb: Limit the number of inflight map requests Avri Altman
2021-03-15 8:31 ` Can Guo
2021-03-16 8:32 ` Avri Altman
2021-03-02 13:25 ` [PATCH v5 09/10] scsi: ufshpb: Add support for host control mode Avri Altman
2021-03-02 13:25 ` [PATCH v5 10/10] scsi: ufshpb: Make host mode parameters configurable Avri Altman
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