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From: Mike Snitzer <snitzer@kernel.org>
To: axboe@kernel.dk
Cc: linux-block@vger.kernel.org, dm-devel@redhat.com, hch@lst.de,
	ming.lei@redhat.com
Subject: [dm-devel] [PATCH v3 2/3] block: allow use of per-cpu bio alloc cache by block drivers
Date: Thu, 24 Mar 2022 16:35:25 -0400	[thread overview]
Message-ID: <20220324203526.62306-3-snitzer@kernel.org> (raw)
In-Reply-To: <20220324203526.62306-1-snitzer@kernel.org>

Refine per-cpu bio alloc cache interfaces so that DM and other block
drivers can properly create and use the cache:

DM uses bioset_init_from_src() to do its final bioset initialization,
so must update bioset_init_from_src() to set BIOSET_PERCPU_CACHE if
%src bioset has a cache.

Also move bio_clear_polled() to include/linux/bio.h to allow users
outside of block core.

Signed-off-by: Mike Snitzer <snitzer@kernel.org>
---
 block/bio.c         | 2 ++
 block/blk.h         | 6 ------
 include/linux/bio.h | 6 ++++++
 3 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/block/bio.c b/block/bio.c
index 09b714469b06..859f728e42dc 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1769,6 +1769,8 @@ int bioset_init_from_src(struct bio_set *bs, struct bio_set *src)
 		flags |= BIOSET_NEED_BVECS;
 	if (src->rescue_workqueue)
 		flags |= BIOSET_NEED_RESCUER;
+	if (src->cache)
+		flags |= BIOSET_PERCPU_CACHE;
 
 	return bioset_init(bs, src->bio_pool.min_nr, src->front_pad, flags);
 }
diff --git a/block/blk.h b/block/blk.h
index 9cb04f24ba8a..4f6b172c3342 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -451,12 +451,6 @@ extern struct device_attribute dev_attr_events;
 extern struct device_attribute dev_attr_events_async;
 extern struct device_attribute dev_attr_events_poll_msecs;
 
-static inline void bio_clear_polled(struct bio *bio)
-{
-	/* can't support alloc cache if we turn off polling */
-	bio->bi_opf &= ~(REQ_POLLED | REQ_ALLOC_CACHE);
-}
-
 long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 10406f57d339..a40a4ba2771f 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -783,6 +783,12 @@ static inline void bio_set_polled(struct bio *bio, struct kiocb *kiocb)
 		bio->bi_opf |= REQ_NOWAIT;
 }
 
+static inline void bio_clear_polled(struct bio *bio)
+{
+	/* can't support alloc cache if we turn off polling */
+	bio->bi_opf &= ~(REQ_POLLED | REQ_ALLOC_CACHE);
+}
+
 struct bio *blk_next_bio(struct bio *bio, struct block_device *bdev,
 		unsigned int nr_pages, unsigned int opf, gfp_t gfp);
 
-- 
2.15.0

--
dm-devel mailing list
dm-devel@redhat.com
https://listman.redhat.com/mailman/listinfo/dm-devel


WARNING: multiple messages have this Message-ID (diff)
From: Mike Snitzer <snitzer@kernel.org>
To: axboe@kernel.dk
Cc: ming.lei@redhat.com, hch@lst.de, dm-devel@redhat.com,
	linux-block@vger.kernel.org
Subject: [PATCH v3 2/3] block: allow use of per-cpu bio alloc cache by block drivers
Date: Thu, 24 Mar 2022 16:35:25 -0400	[thread overview]
Message-ID: <20220324203526.62306-3-snitzer@kernel.org> (raw)
In-Reply-To: <20220324203526.62306-1-snitzer@kernel.org>

Refine per-cpu bio alloc cache interfaces so that DM and other block
drivers can properly create and use the cache:

DM uses bioset_init_from_src() to do its final bioset initialization,
so must update bioset_init_from_src() to set BIOSET_PERCPU_CACHE if
%src bioset has a cache.

Also move bio_clear_polled() to include/linux/bio.h to allow users
outside of block core.

Signed-off-by: Mike Snitzer <snitzer@kernel.org>
---
 block/bio.c         | 2 ++
 block/blk.h         | 6 ------
 include/linux/bio.h | 6 ++++++
 3 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/block/bio.c b/block/bio.c
index 09b714469b06..859f728e42dc 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1769,6 +1769,8 @@ int bioset_init_from_src(struct bio_set *bs, struct bio_set *src)
 		flags |= BIOSET_NEED_BVECS;
 	if (src->rescue_workqueue)
 		flags |= BIOSET_NEED_RESCUER;
+	if (src->cache)
+		flags |= BIOSET_PERCPU_CACHE;
 
 	return bioset_init(bs, src->bio_pool.min_nr, src->front_pad, flags);
 }
diff --git a/block/blk.h b/block/blk.h
index 9cb04f24ba8a..4f6b172c3342 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -451,12 +451,6 @@ extern struct device_attribute dev_attr_events;
 extern struct device_attribute dev_attr_events_async;
 extern struct device_attribute dev_attr_events_poll_msecs;
 
-static inline void bio_clear_polled(struct bio *bio)
-{
-	/* can't support alloc cache if we turn off polling */
-	bio->bi_opf &= ~(REQ_POLLED | REQ_ALLOC_CACHE);
-}
-
 long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 10406f57d339..a40a4ba2771f 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -783,6 +783,12 @@ static inline void bio_set_polled(struct bio *bio, struct kiocb *kiocb)
 		bio->bi_opf |= REQ_NOWAIT;
 }
 
+static inline void bio_clear_polled(struct bio *bio)
+{
+	/* can't support alloc cache if we turn off polling */
+	bio->bi_opf &= ~(REQ_POLLED | REQ_ALLOC_CACHE);
+}
+
 struct bio *blk_next_bio(struct bio *bio, struct block_device *bdev,
 		unsigned int nr_pages, unsigned int opf, gfp_t gfp);
 
-- 
2.15.0


  parent reply	other threads:[~2022-03-25  7:27 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-24 20:35 [dm-devel] [PATCH v3 0/3] block/dm: use BIOSET_PERCPU_CACHE from bio_alloc_bioset Mike Snitzer
2022-03-24 20:35 ` Mike Snitzer
2022-03-24 20:35 ` [dm-devel] [PATCH v3 1/3] block: allow using the per-cpu bio cache " Mike Snitzer
2022-03-24 20:35   ` Mike Snitzer
2022-03-24 20:35 ` Mike Snitzer [this message]
2022-03-24 20:35   ` [PATCH v3 2/3] block: allow use of per-cpu bio alloc cache by block drivers Mike Snitzer
2022-03-25  5:35   ` [dm-devel] " Christoph Hellwig
2022-03-25  5:35     ` Christoph Hellwig
2022-03-24 20:35 ` [dm-devel] [PATCH v3 3/3] dm: conditionally enable BIOSET_PERCPU_CACHE for dm_io bioset Mike Snitzer
2022-03-24 20:35   ` Mike Snitzer
2022-03-30 18:51 ` [dm-devel] (subset) [PATCH v3 0/3] block/dm: use BIOSET_PERCPU_CACHE from bio_alloc_bioset Jens Axboe
2022-03-30 18:51   ` Jens Axboe

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