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authorKanchan Joshi <joshi.k@samsung.com>2021-12-20 19:47:32 +0530
committerJens Axboe <axboe@kernel.dk>2021-12-21 09:38:25 -0700
commite010e95010c0026d0a78cb212b30bea0a2e80bd7 (patch)
treeb984232291d9657a80ecb5e7062e6628827824a1
parent62ce33ed4c858d2de446f20c5860f6d37c4a3dbb (diff)
nvme: enable bio-cache for fixed-buffer passthru
Since we do submission/completion in task, we can have this up. Add a bio-set for nvme as we need that for bio-cache. Signed-off-by: Kanchan Joshi <joshi.k@samsung.com> Signed-off-by: Anuj Gupta <anuj20.g@samsung.com> Link: https://lore.kernel.org/r/20211220141734.12206-12-joshi.k@samsung.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--block/blk-map.c4
-rw-r--r--drivers/nvme/host/core.c9
-rw-r--r--drivers/nvme/host/ioctl.c6
-rw-r--r--drivers/nvme/host/nvme.h1
-rw-r--r--include/linux/blk-mq.h2
5 files changed, 17 insertions, 5 deletions
diff --git a/block/blk-map.c b/block/blk-map.c
index 9aa9864eab55..e3e28b628fba 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -580,7 +580,7 @@ EXPORT_SYMBOL(blk_rq_map_user);
/* Unlike blk_rq_map_user () this is only for fixed-buffer async passthrough. */
int blk_rq_map_user_fixedb(struct request_queue *q, struct request *rq,
- u64 ubuf, unsigned long len, gfp_t gfp_mask,
+ u64 ubuf, unsigned long len, struct bio_set *bs,
struct io_uring_cmd *ioucmd)
{
struct iov_iter iter;
@@ -604,7 +604,7 @@ int blk_rq_map_user_fixedb(struct request_queue *q, struct request *rq,
if (nr_segs > queue_max_segments(q))
return -EINVAL;
/* no iovecs to alloc, as we already have a BVEC iterator */
- bio = bio_alloc(gfp_mask, 0);
+ bio = bio_from_cache(0, bs);
if (!bio)
return -ENOMEM;
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index bce2e93d14a3..0c231946a310 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -30,6 +30,9 @@
#define NVME_MINORS (1U << MINORBITS)
+#define NVME_BIO_POOL_SZ (4)
+struct bio_set nvme_bio_pool;
+
unsigned int admin_timeout = 60;
module_param(admin_timeout, uint, 0644);
MODULE_PARM_DESC(admin_timeout, "timeout in seconds for admin commands");
@@ -4793,6 +4796,11 @@ static int __init nvme_core_init(void)
goto unregister_generic_ns;
}
+ result = bioset_init(&nvme_bio_pool, NVME_BIO_POOL_SZ, 0,
+ BIOSET_NEED_BVECS | BIOSET_PERCPU_CACHE);
+ if (result < 0)
+ goto unregister_generic_ns;
+
return 0;
unregister_generic_ns:
@@ -4815,6 +4823,7 @@ out:
static void __exit nvme_core_exit(void)
{
+ bioset_exit(&nvme_bio_pool);
class_destroy(nvme_ns_chr_class);
class_destroy(nvme_subsys_class);
class_destroy(nvme_class);
diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index dc6a5f1b81ca..013ff9baa78e 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -43,6 +43,7 @@ static void nvme_pt_task_cb(struct io_uring_cmd *ioucmd)
struct request *req = cmd->req;
int status;
u64 result;
+ struct bio *bio = req->bio;
if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
status = -EINTR;
@@ -52,6 +53,7 @@ static void nvme_pt_task_cb(struct io_uring_cmd *ioucmd)
/* we can free request */
blk_mq_free_request(req);
+ blk_rq_unmap_user(bio);
if (cmd->meta) {
if (status)
@@ -73,9 +75,9 @@ static void nvme_end_async_pt(struct request *req, blk_status_t err)
struct bio *bio = cmd->bio;
cmd->req = req;
+ req->bio = bio;
/* this takes care of setting up task-work */
io_uring_cmd_complete_in_task(ioucmd, nvme_pt_task_cb);
- blk_rq_unmap_user(bio);
}
static void nvme_setup_uring_cmd_data(struct request *rq,
@@ -164,7 +166,7 @@ static int nvme_submit_user_cmd(struct request_queue *q,
bufflen, GFP_KERNEL);
else
ret = blk_rq_map_user_fixedb(q, req, ubuffer, bufflen,
- GFP_KERNEL, ioucmd);
+ &nvme_bio_pool, ioucmd);
if (ret)
goto out;
bio = req->bio;
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 9a901b954a87..6bbb8ed868eb 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -47,6 +47,7 @@ extern unsigned int admin_timeout;
extern struct workqueue_struct *nvme_wq;
extern struct workqueue_struct *nvme_reset_wq;
extern struct workqueue_struct *nvme_delete_wq;
+extern struct bio_set nvme_bio_pool;
/*
* List of workarounds for devices that required behavior not specified in
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index a82b054eebde..e35a5d835b1f 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -923,7 +923,7 @@ struct rq_map_data {
int blk_rq_map_user(struct request_queue *, struct request *,
struct rq_map_data *, void __user *, unsigned long, gfp_t);
int blk_rq_map_user_fixedb(struct request_queue *, struct request *,
- u64 ubuf, unsigned long, gfp_t,
+ u64 ubuf, unsigned long, struct bio_set *,
struct io_uring_cmd *);
int blk_rq_map_user_iov(struct request_queue *, struct request *,
struct rq_map_data *, const struct iov_iter *, gfp_t);