From: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
To: Damien Le Moal <Damien.LeMoal@wdc.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>
Cc: "hch@lst.de" <hch@lst.de>, "sagi@grimberg.me" <sagi@grimberg.me>
Subject: Re: [PATCH V9 5/9] nvmet: add bio get helper for different backends
Date: Tue, 12 Jan 2021 05:55:29 +0000 [thread overview]
Message-ID: <BYAPR04MB49656232D23482CAE1948FAE86AA0@BYAPR04MB4965.namprd04.prod.outlook.com> (raw)
In-Reply-To: BL0PR04MB651444A9A810E0DA8D958431E7AA0@BL0PR04MB6514.namprd04.prod.outlook.com
On 1/11/21 21:37, Damien Le Moal wrote:
>> diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
>> index 7361665585a2..3fc84f79cce1 100644
>> --- a/drivers/nvme/target/nvmet.h
>> +++ b/drivers/nvme/target/nvmet.h
>> @@ -652,4 +652,20 @@ nvmet_bdev_execute_zone_append(struct nvmet_req *req)
>> }
>> #endif /* CONFIG_BLK_DEV_ZONED */
>>
>> +static inline struct bio *nvmet_req_bio_get(struct nvmet_req *req,
>> + bio_end_io_t *bi_end_io)
>> +{
>> + struct bio *bio;
>> +
>> + if (req->transfer_len <= NVMET_MAX_INLINE_DATA_LEN) {
>> + bio = &req->b.inline_bio;
>> + bio_init(bio, req->inline_bvec, ARRAY_SIZE(req->inline_bvec));
>> + return bio;
>> + }
>> +
>> + bio = bio_alloc(GFP_KERNEL, req->sg_cnt);
> I have a doubt about the use of GFP_KERNEL here... Shouldn't these be GFP_NOIO ?
> The code was like this so it is may be OK, but without GFP_NOIO, is forward
> progress guaranteed ? No recursion possible ?
>
I've kept the original behavior, let check if this needs to be
GFP_KERNEL or not,
if so I'll send a separate patch with a proper message.
Thanks for pointing this out.
WARNING: multiple messages have this Message-ID (diff)
From: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
To: Damien Le Moal <Damien.LeMoal@wdc.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>
Cc: "hch@lst.de" <hch@lst.de>, "sagi@grimberg.me" <sagi@grimberg.me>
Subject: Re: [PATCH V9 5/9] nvmet: add bio get helper for different backends
Date: Tue, 12 Jan 2021 05:55:29 +0000 [thread overview]
Message-ID: <BYAPR04MB49656232D23482CAE1948FAE86AA0@BYAPR04MB4965.namprd04.prod.outlook.com> (raw)
In-Reply-To: BL0PR04MB651444A9A810E0DA8D958431E7AA0@BL0PR04MB6514.namprd04.prod.outlook.com
On 1/11/21 21:37, Damien Le Moal wrote:
>> diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
>> index 7361665585a2..3fc84f79cce1 100644
>> --- a/drivers/nvme/target/nvmet.h
>> +++ b/drivers/nvme/target/nvmet.h
>> @@ -652,4 +652,20 @@ nvmet_bdev_execute_zone_append(struct nvmet_req *req)
>> }
>> #endif /* CONFIG_BLK_DEV_ZONED */
>>
>> +static inline struct bio *nvmet_req_bio_get(struct nvmet_req *req,
>> + bio_end_io_t *bi_end_io)
>> +{
>> + struct bio *bio;
>> +
>> + if (req->transfer_len <= NVMET_MAX_INLINE_DATA_LEN) {
>> + bio = &req->b.inline_bio;
>> + bio_init(bio, req->inline_bvec, ARRAY_SIZE(req->inline_bvec));
>> + return bio;
>> + }
>> +
>> + bio = bio_alloc(GFP_KERNEL, req->sg_cnt);
> I have a doubt about the use of GFP_KERNEL here... Shouldn't these be GFP_NOIO ?
> The code was like this so it is may be OK, but without GFP_NOIO, is forward
> progress guaranteed ? No recursion possible ?
>
I've kept the original behavior, let check if this needs to be
GFP_KERNEL or not,
if so I'll send a separate patch with a proper message.
Thanks for pointing this out.
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next prev parent reply other threads:[~2021-01-12 5:56 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-12 4:26 [PATCH V9 0/9] nvmet: add ZBD backend support Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 4:26 ` [PATCH V9 1/9] block: export bio_add_hw_pages() Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 5:40 ` Damien Le Moal
2021-01-12 5:40 ` Damien Le Moal
2021-01-12 7:24 ` Christoph Hellwig
2021-01-12 7:24 ` Christoph Hellwig
2021-01-13 1:20 ` Chaitanya Kulkarni
2021-01-13 1:20 ` Chaitanya Kulkarni
2021-01-12 4:26 ` [PATCH V9 2/9] nvmet: add lba to sect conversion helpers Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 5:08 ` Damien Le Moal
2021-01-12 5:08 ` Damien Le Moal
2021-01-18 18:19 ` Christoph Hellwig
2021-01-18 18:19 ` Christoph Hellwig
2021-01-12 4:26 ` [PATCH V9 3/9] nvmet: add NVM command set identifier support Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 7:27 ` Christoph Hellwig
2021-01-12 7:27 ` Christoph Hellwig
2021-01-13 4:16 ` Chaitanya Kulkarni
2021-01-13 4:16 ` Chaitanya Kulkarni
2021-01-18 18:21 ` Christoph Hellwig
2021-01-18 18:21 ` Christoph Hellwig
2021-01-12 4:26 ` [PATCH V9 4/9] nvmet: add ZBD over ZNS backend support Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 5:32 ` Damien Le Moal
2021-01-12 5:32 ` Damien Le Moal
2021-01-12 6:11 ` Chaitanya Kulkarni
2021-01-12 6:11 ` Chaitanya Kulkarni
2021-01-12 6:31 ` Damien Le Moal
2021-01-12 6:31 ` Damien Le Moal
2021-01-12 7:48 ` Christoph Hellwig
2021-01-12 7:48 ` Christoph Hellwig
2021-01-12 7:52 ` Damien Le Moal
2021-01-12 7:52 ` Damien Le Moal
2021-01-18 18:25 ` Christoph Hellwig
2021-01-18 18:25 ` Christoph Hellwig
2021-01-19 0:02 ` Damien Le Moal
2021-01-19 0:02 ` Damien Le Moal
2021-01-19 4:28 ` Damien Le Moal
2021-01-19 4:28 ` Damien Le Moal
2021-01-19 6:15 ` hch
2021-01-19 6:15 ` hch
2021-01-13 4:57 ` Chaitanya Kulkarni
2021-01-13 4:57 ` Chaitanya Kulkarni
2021-01-18 18:27 ` Christoph Hellwig
2021-01-18 18:27 ` Christoph Hellwig
2021-01-12 4:26 ` [PATCH V9 5/9] nvmet: add bio get helper for different backends Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 5:37 ` Damien Le Moal
2021-01-12 5:37 ` Damien Le Moal
2021-01-12 5:55 ` Chaitanya Kulkarni [this message]
2021-01-12 5:55 ` Chaitanya Kulkarni
2021-01-12 7:33 ` Christoph Hellwig
2021-01-12 7:33 ` Christoph Hellwig
2021-01-13 5:03 ` Chaitanya Kulkarni
2021-01-13 5:03 ` Chaitanya Kulkarni
2021-01-18 18:28 ` Christoph Hellwig
2021-01-18 18:28 ` Christoph Hellwig
2021-01-19 4:57 ` Chaitanya Kulkarni
2021-01-19 4:57 ` Chaitanya Kulkarni
2021-01-12 4:26 ` [PATCH V9 6/9] nvmet: add bio init " Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 5:40 ` Damien Le Moal
2021-01-12 5:40 ` Damien Le Moal
2021-01-12 5:57 ` Chaitanya Kulkarni
2021-01-12 5:57 ` Chaitanya Kulkarni
2021-01-12 6:27 ` Damien Le Moal
2021-01-12 6:27 ` Damien Le Moal
2021-01-12 7:33 ` Christoph Hellwig
2021-01-12 7:33 ` Christoph Hellwig
2021-01-13 5:04 ` Chaitanya Kulkarni
2021-01-13 5:04 ` Chaitanya Kulkarni
2021-01-18 18:33 ` Christoph Hellwig
2021-01-18 18:33 ` Christoph Hellwig
2021-01-12 4:26 ` [PATCH V9 7/9] nvmet: add bio put " Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 4:26 ` [PATCH V9 8/9] nvmet: add common I/O length check helper Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 7:35 ` Christoph Hellwig
2021-01-12 7:35 ` Christoph Hellwig
2021-01-13 5:07 ` Chaitanya Kulkarni
2021-01-13 5:07 ` Chaitanya Kulkarni
2021-01-18 18:34 ` Christoph Hellwig
2021-01-18 18:34 ` Christoph Hellwig
2021-01-12 4:26 ` [PATCH V9 9/9] nvmet: call nvmet_bio_done() for zone append Chaitanya Kulkarni
2021-01-12 4:26 ` Chaitanya Kulkarni
2021-01-12 7:36 ` Christoph Hellwig
2021-01-12 7:36 ` Christoph Hellwig
2021-01-13 5:13 ` Chaitanya Kulkarni
2021-01-13 5:13 ` Chaitanya Kulkarni
2021-01-12 6:12 ` [PATCH V9 0/9] nvmet: add ZBD backend support Chaitanya Kulkarni
2021-01-12 6:12 ` Chaitanya Kulkarni
2021-02-10 22:42 ` Chaitanya Kulkarni
2021-02-10 22:42 ` Chaitanya Kulkarni
2021-02-11 7:20 ` hch
2021-02-11 7:20 ` hch
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