* [PATCH v2] lightnvm: pblk: consider max hw sectors supported for max_write_pgs
@ 2018-10-05 17:39 Zhoujie Wu
2018-10-06 1:01 ` Matias Bjørling
0 siblings, 1 reply; 4+ messages in thread
From: Zhoujie Wu @ 2018-10-05 17:39 UTC (permalink / raw)
To: mb, linux-block; +Cc: hongd, Zhoujie Wu
When do GC, the number of read/write sectors are determined
by max_write_pgs(see gc_rq preparation in pblk_gc_line_prepare_ws).
Due to max_write_pgs doesn't consider max hw sectors
supported by nvme controller(128K), which leads to GC
tries to read 64 * 4K in one command, and see below error
caused by pblk_bio_map_addr in function pblk_submit_read_gc.
[ 2923.005376] pblk: could not add page to bio
[ 2923.005377] pblk: could not allocate GC bio (18446744073709551604)
Signed-off-by: Zhoujie Wu <zjwu@marvell.com>
---
v2: Changed according to Javier's comments.
Remove unneccessary comment and move the definition of bqueue to
maintain ordering.
drivers/lightnvm/pblk-init.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index e357388..0ef9ac5 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -391,6 +391,7 @@ static void pblk_put_global_caches(void)
static int pblk_core_init(struct pblk *pblk)
{
struct nvm_tgt_dev *dev = pblk->dev;
+ struct request_queue *bqueue = dev->q;
struct nvm_geo *geo = &dev->geo;
int ret, max_write_ppas;
@@ -407,6 +408,8 @@ static int pblk_core_init(struct pblk *pblk)
pblk->min_write_pgs = geo->ws_opt;
max_write_ppas = pblk->min_write_pgs * geo->all_luns;
pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA);
+ pblk->max_write_pgs = min_t(int, pblk->max_write_pgs,
+ queue_max_hw_sectors(bqueue) / (geo->csecs >> 9));
pblk_set_sec_per_write(pblk, pblk->min_write_pgs);
pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1, sizeof(atomic64_t),
--
1.9.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v2] lightnvm: pblk: consider max hw sectors supported for max_write_pgs
2018-10-05 17:39 [PATCH v2] lightnvm: pblk: consider max hw sectors supported for max_write_pgs Zhoujie Wu
@ 2018-10-06 1:01 ` Matias Bjørling
2018-10-06 1:09 ` [EXT] " Zhoujie Wu
2018-10-08 7:04 ` Javier Gonzalez
0 siblings, 2 replies; 4+ messages in thread
From: Matias Bjørling @ 2018-10-06 1:01 UTC (permalink / raw)
To: zjwu, linux-block; +Cc: hongd, javier
On 10/05/2018 07:39 PM, Zhoujie Wu wrote:
> When do GC, the number of read/write sectors are determined
> by max_write_pgs(see gc_rq preparation in pblk_gc_line_prepare_ws).
>
> Due to max_write_pgs doesn't consider max hw sectors
> supported by nvme controller(128K), which leads to GC
> tries to read 64 * 4K in one command, and see below error
> caused by pblk_bio_map_addr in function pblk_submit_read_gc.
>
> [ 2923.005376] pblk: could not add page to bio
> [ 2923.005377] pblk: could not allocate GC bio (18446744073709551604)
>
> Signed-off-by: Zhoujie Wu <zjwu@marvell.com>
> ---
> v2: Changed according to Javier's comments.
> Remove unneccessary comment and move the definition of bqueue to
> maintain ordering.
>
> drivers/lightnvm/pblk-init.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
> index e357388..0ef9ac5 100644
> --- a/drivers/lightnvm/pblk-init.c
> +++ b/drivers/lightnvm/pblk-init.c
> @@ -391,6 +391,7 @@ static void pblk_put_global_caches(void)
> static int pblk_core_init(struct pblk *pblk)
> {
> struct nvm_tgt_dev *dev = pblk->dev;
> + struct request_queue *bqueue = dev->q;
> struct nvm_geo *geo = &dev->geo;
> int ret, max_write_ppas;
>
> @@ -407,6 +408,8 @@ static int pblk_core_init(struct pblk *pblk)
> pblk->min_write_pgs = geo->ws_opt;
> max_write_ppas = pblk->min_write_pgs * geo->all_luns;
> pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA);
> + pblk->max_write_pgs = min_t(int, pblk->max_write_pgs,
> + queue_max_hw_sectors(bqueue) / (geo->csecs >> 9));
> pblk_set_sec_per_write(pblk, pblk->min_write_pgs);
>
> pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1, sizeof(atomic64_t),
>
Thanks Zhoujie. I've done the following update and applied it to 4.20.
Note that I also removed the bqueue.
- pblk->max_write_pgs = min_t(int, pblk->max_write_pgs,
- queue_max_hw_sectors(bqueue) / (geo->csecs >> 9));
+ pblk->max_write_pgs = min_t(int, pblk->max_write_pgs,
+ queue_max_hw_sectors(dev->q) / (geo->csecs >>
SECTOR_SHIFT));
Javier, I've carried over your Reviewed-by, let me know if you want it
to be removed.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [EXT] Re: [PATCH v2] lightnvm: pblk: consider max hw sectors supported for max_write_pgs
2018-10-06 1:01 ` Matias Bjørling
@ 2018-10-06 1:09 ` Zhoujie Wu
2018-10-08 7:04 ` Javier Gonzalez
1 sibling, 0 replies; 4+ messages in thread
From: Zhoujie Wu @ 2018-10-06 1:09 UTC (permalink / raw)
To: Matias Bjørling, linux-block; +Cc: hongd, javier
On 10/05/2018 06:01 PM, Matias Bjørling wrote:
> External Email
>
> ----------------------------------------------------------------------
> On 10/05/2018 07:39 PM, Zhoujie Wu wrote:
>> When do GC, the number of read/write sectors are determined
>> by max_write_pgs(see gc_rq preparation in pblk_gc_line_prepare_ws).
>>
>> Due to max_write_pgs doesn't consider max hw sectors
>> supported by nvme controller(128K), which leads to GC
>> tries to read 64 * 4K in one command, and see below error
>> caused by pblk_bio_map_addr in function pblk_submit_read_gc.
>>
>> [ 2923.005376] pblk: could not add page to bio
>> [ 2923.005377] pblk: could not allocate GC bio (18446744073709551604)
>>
>> Signed-off-by: Zhoujie Wu <zjwu@marvell.com>
>> ---
>> v2: Changed according to Javier's comments.
>> Remove unneccessary comment and move the definition of bqueue to
>> maintain ordering.
>>
>> drivers/lightnvm/pblk-init.c | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
>> index e357388..0ef9ac5 100644
>> --- a/drivers/lightnvm/pblk-init.c
>> +++ b/drivers/lightnvm/pblk-init.c
>> @@ -391,6 +391,7 @@ static void pblk_put_global_caches(void)
>> static int pblk_core_init(struct pblk *pblk)
>> {
>> struct nvm_tgt_dev *dev = pblk->dev;
>> + struct request_queue *bqueue = dev->q;
>> struct nvm_geo *geo = &dev->geo;
>> int ret, max_write_ppas;
>> @@ -407,6 +408,8 @@ static int pblk_core_init(struct pblk *pblk)
>> pblk->min_write_pgs = geo->ws_opt;
>> max_write_ppas = pblk->min_write_pgs * geo->all_luns;
>> pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA);
>> + pblk->max_write_pgs = min_t(int, pblk->max_write_pgs,
>> + queue_max_hw_sectors(bqueue) / (geo->csecs >> 9));
>> pblk_set_sec_per_write(pblk, pblk->min_write_pgs);
>> pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1,
>> sizeof(atomic64_t),
>>
>
> Thanks Zhoujie. I've done the following update and applied it to 4.20.
> Note that I also removed the bqueue.
Good for me, thanks a lot.
>
> - pblk->max_write_pgs = min_t(int, pblk->max_write_pgs,
> - queue_max_hw_sectors(bqueue) / (geo->csecs >> 9));
> + pblk->max_write_pgs = min_t(int, pblk->max_write_pgs,
> + queue_max_hw_sectors(dev->q) / (geo->csecs >>
> SECTOR_SHIFT));
>
> Javier, I've carried over your Reviewed-by, let me know if you want it
> to be removed.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] lightnvm: pblk: consider max hw sectors supported for max_write_pgs
2018-10-06 1:01 ` Matias Bjørling
2018-10-06 1:09 ` [EXT] " Zhoujie Wu
@ 2018-10-08 7:04 ` Javier Gonzalez
1 sibling, 0 replies; 4+ messages in thread
From: Javier Gonzalez @ 2018-10-08 7:04 UTC (permalink / raw)
To: Matias Bjørling; +Cc: zjwu, linux-block, hongd
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-10-08 14:14 UTC | newest]
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2018-10-05 17:39 [PATCH v2] lightnvm: pblk: consider max hw sectors supported for max_write_pgs Zhoujie Wu
2018-10-06 1:01 ` Matias Bjørling
2018-10-06 1:09 ` [EXT] " Zhoujie Wu
2018-10-08 7:04 ` Javier Gonzalez
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