On Wed, Feb 27, 2019 at 08:47:09PM +, Jon Hunter wrote:
>
> On 21/02/2019 08:42, Marek Szyprowski wrote:
> > Dear All,
> >
> > On 2019-02-15 12:13, Ming Lei wrote:
> >> This patch pulls the trigger for multi-page bvecs.
> >>
> >> Revie
On Thu, Feb 21, 2019 at 11:22:39AM +0100, Marek Szyprowski wrote:
> Hi Ming,
>
> On 2019-02-21 11:16, Ming Lei wrote:
> > On Thu, Feb 21, 2019 at 11:08:19AM +0100, Marek Szyprowski wrote:
> >> On 2019-02-21 10:57, Ming Lei wrote:
> >>> On Thu, Feb 21, 2019 a
On Thu, Feb 21, 2019 at 11:08:19AM +0100, Marek Szyprowski wrote:
> Hi Ming,
>
> On 2019-02-21 10:57, Ming Lei wrote:
> > On Thu, Feb 21, 2019 at 09:42:59AM +0100, Marek Szyprowski wrote:
> >> On 2019-02-15 12:13, Ming Lei wrote:
> >>> This patch pu
On Thu, Feb 21, 2019 at 09:42:59AM +0100, Marek Szyprowski wrote:
> Dear All,
>
> On 2019-02-15 12:13, Ming Lei wrote:
> > This patch pulls the trigger for multi-page bvecs.
> >
> > Reviewed-by: Omar Sandoval
> > Signed-off-by: Ming Lei
>
> Since Lin
On Tue, Feb 19, 2019 at 08:28:19AM -0800, Bart Van Assche wrote:
> On Sun, 2019-02-17 at 21:11 +0800, Ming Lei wrote:
> > The following patch should fix this issue:
> >
> >
> > diff --git a/block/blk-merge.c b/block/blk-merge.c
> > index bed065904677..066b66
On Sun, Feb 17, 2019 at 09:13:32PM +0800, Ming Lei wrote:
> On Fri, Feb 15, 2019 at 10:59:47AM -0700, Jens Axboe wrote:
> > On 2/15/19 10:14 AM, Bart Van Assche wrote:
> > > On Fri, 2019-02-15 at 08:49 -0700, Jens Axboe wrote:
> > >> On 2/15/19 4:13 AM, Ming Lei wrote
On Fri, Feb 15, 2019 at 10:59:47AM -0700, Jens Axboe wrote:
> On 2/15/19 10:14 AM, Bart Van Assche wrote:
> > On Fri, 2019-02-15 at 08:49 -0700, Jens Axboe wrote:
> >> On 2/15/19 4:13 AM, Ming Lei wrote:
> >>> This patchset brings multi-page bvec into block layer:
QUEUE_FLAG_NO_SG_MERGE has been killed, so kill BLK_MQ_F_SG_MERGE too.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
block/blk-mq-debugfs.c | 1 -
drivers/block/loop.c | 2 +-
drivers/block/nbd.c | 2 +-
drivers/block/rbd.c
-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
include/linux/bio.h | 8
1 file changed, 8 deletions(-)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 9f77adcfde82..bdd11d4c2f05 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -34,15 +34,7 @@
#define BIO_BUG_ON
#endif
Signed-off-by: Ming Lei
---
block/blk-merge.c | 31 ++-
block/blk-mq-debugfs.c | 1 -
block/blk-mq.c | 3 ---
drivers/md/dm-table.c | 13 -
include/linux/blkdev.h | 1 -
5 files changed, 6 insertions(+), 43 deletions(-)
diff --git a/block/blk
Now multi-page bvec is supported, some helpers may return page by
page, meantime some may return segment by segment, this patch
documents the usage.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
Documentation/block/biovecs.txt | 25
This patch pulls the trigger for multi-page bvecs.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
block/bio.c | 22 +++---
fs/iomap.c | 4 ++--
fs/xfs/xfs_aops.c | 4 ++--
include/linux/bio.h | 2 +-
4 files changed, 20 insertions(+), 12 deletions
iov_iter is implemented on bvec itererator helpers, so it is safe to pass
multi-page bvec to it, and this way is much more efficient than passing one
page in each bvec.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
drivers/block/loop.c | 20
Preparing for supporting multi-page bvec.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
fs/btrfs/extent_io.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index dc8ba3ee515d..986ef49b0269 100644
--- a/fs/btrfs
ngle patch, so that we can
avoid to use a temporary helper for this conversion.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
block/bio.c | 27 ++-
block/bounce.c| 6 --
drivers/md/bc
-off-by: Ming Lei
---
block/blk-merge.c | 103 +++---
1 file changed, 83 insertions(+), 20 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index f85d878f313d..4ef56b2d2aa5 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -161,6
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
drivers/md/bcache/util.c | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c
index 20eddeac1531..62fb917f7a4f 100644
--- a/drivers/md/bcache
Once multi-page bvec is enabled, the last bvec may include more than one
page, this patch use mp_bvec_last_segment() to truncate the bio.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
fs/buffer.c | 5 -
1 file changed, 4 insertions(+), 1 deletion
It is more efficient to use bio_for_each_bvec() to map sg, meantime
we have to consider splitting multipage bvec as done in blk_bio_segment_split().
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
block/blk-merge.c | 70
BTRFS and guard_bio_eod() need to get the last singlepage segment
from one multipage bvec, so introduce this helper to make them happy.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 22 ++
1 file changed, 22 insertions(+)
diff --git
-off-by: Ming Lei
---
include/linux/bio.h| 10 ++
include/linux/blkdev.h | 4
2 files changed, 14 insertions(+)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 72b4f7be2106..7ef8a7505c0a 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -156,6 +156,16 @@ st
ept
not changed
- returned(copied) single-page bvec is built in flight by bvec
helpers from the stored multi-page bvec
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 30 +++---
1 file changed, 27 insertions(+)
Commit 7759eb23fd980 ("block: remove bio_rewind_iter()") removes
bio_rewind_iter(), then no one uses bvec_iter_rewind() any more,
so remove it.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 24 --
6], http://marc.info/?t=14982021534=1=2
Christoph Hellwig (1):
btrfs: look at bi_size for repair decisions
Ming Lei (17):
block: don't use bio->bi_vcnt to figure out segment number
block: remove bvec_iter_rewind()
block: introduce multi-page bvec helpers
block: introduce bio_fo
From: Christoph Hellwig
bio_readpage_error currently uses bi_vcnt to decide if it is worth
retrying an I/O. But the vector count is mostly an implementation
artifact - it really should figure out if there is more than a
single sector worth retrying. Use bi_size for that and shift by
t if it isn't less than max
segments")
Signed-off-by: Ming Lei
---
block/blk-merge.c | 8 +---
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 71e9ac03f621..f85d878f313d 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@
On Mon, Jan 21, 2019 at 01:43:21AM -0800, Sagi Grimberg wrote:
>
> > V14:
> > - drop patch(patch 4 in V13) for renaming bvec helpers, as suggested by
> > Jens
> > - use mp_bvec_* as multi-page bvec helper name
> > - fix one build issue, which is caused by missing one converion of
> >
On Mon, Jan 21, 2019 at 09:38:10AM +0100, Christoph Hellwig wrote:
> On Mon, Jan 21, 2019 at 04:37:12PM +0800, Ming Lei wrote:
> > On Mon, Jan 21, 2019 at 09:22:46AM +0100, Christoph Hellwig wrote:
> > > On Mon, Jan 21, 2019 at 04:17:47PM +0800, Ming Lei wrote:
> > > &g
Signed-off-by: Ming Lei
---
block/blk-merge.c | 31 ++-
block/blk-mq-debugfs.c | 1 -
block/blk-mq.c | 3 ---
drivers/md/dm-table.c | 13 -
include/linux/blkdev.h | 1 -
5 files changed, 6 insertions(+), 43 deletions(-)
diff --git a/block/blk
QUEUE_FLAG_NO_SG_MERGE has been killed, so kill BLK_MQ_F_SG_MERGE too.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
block/blk-mq-debugfs.c | 1 -
drivers/block/loop.c | 2 +-
drivers/block/nbd.c | 2 +-
drivers/block/rbd.c
Now multi-page bvec is supported, some helpers may return page by
page, meantime some may return segment by segment, this patch
documents the usage.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
Documentation/block/biovecs.txt | 25
-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
include/linux/bio.h | 8
1 file changed, 8 deletions(-)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index af288f6e8ab0..1d279a6ae737 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -34,15 +34,7 @@
#define BIO_BUG_ON
#endif
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
drivers/md/bcache/util.c | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c
index 20eddeac1531..62fb917f7a4f 100644
--- a/drivers/md/bcache
iov_iter is implemented on bvec itererator helpers, so it is safe to pass
multi-page bvec to it, and this way is much more efficient than passing one
page in each bvec.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
drivers/block/loop.c | 20
Once multi-page bvec is enabled, the last bvec may include more than one
page, this patch use mp_bvec_last_segment() to truncate the bio.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
fs/buffer.c | 5 -
1 file changed, 4 insertions(+), 1 deletion
This patch pulls the trigger for multi-page bvecs.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
block/bio.c | 22 +++---
fs/iomap.c | 4 ++--
fs/xfs/xfs_aops.c | 4 ++--
include/linux/bio.h | 2 +-
4 files changed, 20 insertions(+), 12 deletions
ngle patch, so that we can
avoid to use a temporary helper for this conversion.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
block/bio.c | 27 ++-
block/bounce.c| 6 --
drivers/md/bc
Preparing for supporting multi-page bvec.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
fs/btrfs/extent_io.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index dc8ba3ee515d..986ef49b0269 100644
--- a/fs/btrfs
It is more efficient to use bio_for_each_mp_bvec() to map sg, meantime
we have to consider splitting multipage bvec as done in blk_bio_segment_split().
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
block/blk-merge.c | 70
Signed-off-by: Ming Lei
---
block/blk-merge.c | 103 +++---
1 file changed, 83 insertions(+), 20 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index f85d878f313d..2dfc30d8bc77 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
BTRFS and guard_bio_eod() need to get the last singlepage segment
from one multipage bvec, so introduce this helper to make them happy.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 22 ++
1 file changed, 22 insertions(+)
diff --git
ept
not changed
- returned(copied) single-page bvec is built in flight by bvec
helpers from the stored multi-page bvec
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 30 +++---
1 file changed, 27 insertions(+)
Commit 7759eb23fd980 ("block: remove bio_rewind_iter()") removes
bio_rewind_iter(), then no one uses bvec_iter_rewind() any more,
so remove it.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 24 --
-off-by: Ming Lei
---
include/linux/bio.h| 10 ++
include/linux/blkdev.h | 4
2 files changed, 14 insertions(+)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 72b4f7be2106..730288145568 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -156,6 +15
t if it isn't less than max
segments")
Signed-off-by: Ming Lei
---
block/blk-merge.c | 8 +---
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 71e9ac03f621..f85d878f313d 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@
4], http://marc.info/?l=linux-mm=147745525801433=2
[5], http://marc.info/?t=14956948457=1=2
[6], http://marc.info/?t=14982021534=1=2
Christoph Hellwig (1):
btrfs: look at bi_size for repair decisions
Ming Lei (17):
block: don't use bio->bi_vcnt to figure out segment number
bl
From: Christoph Hellwig
bio_readpage_error currently uses bi_vcnt to decide if it is worth
retrying an I/O. But the vector count is mostly an implementation
artifact - it really should figure out if there is more than a
single sector worth retrying. Use bi_size for that and shift by
Now multi-page bvec is supported, some helpers may return page by
page, meantime some may return segment by segment, this patch
documents the usage.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
Documentation/block/biovecs.txt | 25
-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
include/linux/bio.h | 8
1 file changed, 8 deletions(-)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 1ece9f30294b..54ef81f11f83 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -34,15 +34,7 @@
#define BIO_BUG_ON
#endif
Signed-off-by: Ming Lei
---
block/blk-merge.c | 31 ++-
block/blk-mq-debugfs.c | 1 -
block/blk-mq.c | 3 ---
drivers/md/dm-table.c | 13 -
include/linux/blkdev.h | 1 -
5 files changed, 6 insertions(+), 43 deletions(-)
diff --git a/block/blk
This patch pulls the trigger for multi-page bvecs.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
block/bio.c | 22 +++---
fs/iomap.c | 4 ++--
fs/xfs/xfs_aops.c | 4 ++--
include/linux/bio.h | 2 +-
4 files changed, 20 insertions(+), 12 deletions
QUEUE_FLAG_NO_SG_MERGE has been killed, so kill BLK_MQ_F_SG_MERGE too.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
block/blk-mq-debugfs.c | 1 -
drivers/block/loop.c | 2 +-
drivers/block/nbd.c | 2 +-
drivers/block/rbd.c
ngle patch, so that we can
avoid to use a temporary helper for this conversion.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
block/bio.c | 27 ++-
block/bounce.c| 6 --
drivers/md/bc
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
drivers/md/bcache/util.c | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c
index 20eddeac1531..62fb917f7a4f 100644
--- a/drivers/md/bcache
iov_iter is implemented on bvec itererator helpers, so it is safe to pass
multi-page bvec to it, and this way is much more efficient than passing one
page in each bvec.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
drivers/block/loop.c | 20
Preparing for supporting multi-page bvec.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
fs/btrfs/extent_io.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index dc8ba3ee515d..c092f88700bd 100644
--- a/fs/btrfs
BTRFS and guard_bio_eod() need to get the last singlepage segment
from one multipage bvec, so introduce this helper to make them happy.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 22 ++
1 file changed, 22 insertions(+)
diff --git
It is more efficient to use bio_for_each_bvec() to map sg, meantime
we have to consider splitting multipage bvec as done in blk_bio_segment_split().
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
block/blk-merge.c | 70
Once multi-page bvec is enabled, the last bvec may include more than one
page, this patch use bvec_last_segment() to truncate the bio.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
fs/buffer.c | 5 -
1 file changed, 4 insertions(+), 1 deletion
ept
not changed
- returned(copied) single-page bvec is built in flight by bvec
helpers from the stored multi-page bvec
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 25 -
1 file changed, 20 insertions(+)
-off-by: Ming Lei
---
include/linux/bio.h| 10 ++
include/linux/blkdev.h | 4
include/linux/bvec.h | 7 +++
3 files changed, 21 insertions(+)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 16a65361535f..06888d45beb4 100644
--- a/include/linux/bio.h
+++ b/include/l
-off-by: Ming Lei
---
block/blk-merge.c | 99 ---
1 file changed, 79 insertions(+), 20 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index f85d878f313d..abe1c89c1253 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -161,6
Commit 7759eb23fd980 ("block: remove bio_rewind_iter()") removes
bio_rewind_iter(), then no one uses bvec_iter_rewind() any more,
so remove it.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 24 --
.
bvec_iter_advance() isn't renamed becasue this helper is always operated
on real bvec even though multi-page bvec is supported.
Acked-by: Miguel Ojeda
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Suggested-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
.clang-format | 2
t if it isn't less than max
segments")
Signed-off-by: Ming Lei
---
block/blk-merge.c | 8 +---
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 71e9ac03f621..f85d878f313d 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@
5], http://marc.info/?t=14956948457=1=2
[6], http://marc.info/?t=14982021534=1=2
Christoph Hellwig (1):
btrfs: look at bi_size for repair decisions
Ming Lei (18):
block: don't use bio->bi_vcnt to figure out segment number
block: remove bvec_iter_rewind()
block: rename bvec help
From: Christoph Hellwig
bio_readpage_error currently uses bi_vcnt to decide if it is worth
retrying an I/O. But the vector count is mostly an implementation
artifact - it really should figure out if there is more than a
single sector worth retrying. Use bi_size for that and shift by
On Wed, Nov 28, 2018 at 07:20:51PM -0700, Jens Axboe wrote:
> On 11/28/18 6:30 PM, Ming Lei wrote:
> >> I'm going back and forth on those one a bit. Any concerns with
> >> pushing this to 4.22?
> >
> > My only one concern is about the warning of
> > "b
On Wed, Nov 28, 2018 at 06:44:00AM -0700, Jens Axboe wrote:
> On 11/25/18 7:17 PM, Ming Lei wrote:
> > Hi,
> >
> > This patchset brings multi-page bvec into block layer:
> >
> > 1) what is multi-page bvec?
> >
> > Multipage bvecs means that
On Mon, Nov 26, 2018 at 01:58:42PM +0100, Christoph Hellwig wrote:
> > + phys_addr_t vec_end_addr = page_to_phys(bv->bv_page) +
> > + bv->bv_offset + bv->bv_len;
>
> The name is a little confusing, as the real end addr would be -1. Maybe
> throw the -1 in here, and
QUEUE_FLAG_NO_SG_MERGE has been killed, so kill BLK_MQ_F_SG_MERGE too.
Reviewed-by: Christoph Hellwig
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
block/blk-mq-debugfs.c | 1 -
drivers/block/loop.c | 2 +-
drivers/block/nbd.c | 2 +-
drivers/block/rbd.c
Signed-off-by: Ming Lei
---
block/blk-merge.c | 31 ++-
block/blk-mq-debugfs.c | 1 -
block/blk-mq.c | 3 ---
drivers/md/dm-table.c | 13 -
include/linux/blkdev.h | 1 -
5 files changed, 6 insertions(+), 43 deletions(-)
diff --git a/block/blk
Now multi-page bvec is supported, some helpers may return page by
page, meantime some may return segment by segment, this patch
documents the usage.
Signed-off-by: Ming Lei
---
Documentation/block/biovecs.txt | 25 +
1 file changed, 25 insertions(+)
diff --git
-by: Ming Lei
---
include/linux/bio.h | 8
1 file changed, 8 deletions(-)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 5505f74aef8b..7be48c55b14a 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -34,15 +34,7 @@
#define BIO_BUG_ON
#endif
-#ifdef CONFIG_THP_SWAP
This patch pulls the trigger for multi-page bvecs.
Signed-off-by: Ming Lei
---
block/bio.c | 22 +++---
fs/iomap.c | 4 ++--
fs/xfs/xfs_aops.c | 4 ++--
include/linux/bio.h | 2 +-
4 files changed, 20 insertions(+), 12 deletions(-)
diff --git a/block/bio.c
Once multi-page bvec is enabled, the last bvec may include more than one
page, this patch use bvec_last_segment() to truncate the bio.
Reviewed-by: Omar Sandoval
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
fs/buffer.c | 5 -
1 file changed, 4 insertions(+), 1 deletion
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
drivers/md/bcache/util.c | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c
index 20eddeac1531..62fb917f7a4f 100644
--- a/drivers/md/bcache/util.c
+++ b/drivers/md/bcache
ngle patch, so that we can
avoid to use a temporary helper for this conversion.
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
block/bio.c | 27 ++-
block/bounce.c| 6 --
drivers/md/bcache/btree.c
iov_iter is implemented on bvec itererator helpers, so it is safe to pass
multi-page bvec to it, and this way is much more efficient than passing one
page in each bvec.
Reviewed-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
drivers/block/loop.c | 20 ++--
1 file changed, 10
BTRFS and guard_bio_eod() need to get the last singlepage segment
from one multipage bvec, so introduce this helper to make them happy.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 22 ++
1 file changed, 22 insertions(+)
diff --git
max segment size,
so we have to split the big bvec into several segments.
Thirdly when splitting multi-page bvec into segments, the max segment
limit may be reached, so the bio split need to be considered under
this situation too.
Signed-off-by: Ming Lei
---
block/blk-merge.c | 100
It is more efficient to use bio_for_each_bvec() to map sg, meantime
we have to consider splitting multipage bvec as done in blk_bio_segment_split().
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
block/blk-merge.c | 70 +++
1 file
bio_for_each_bvec() is used for iterating over multi-page bvec for bio
split & merge code.
rq_for_each_bvec() can be used for drivers which may handle the
multi-page bvec directly, so far loop is one perfect use case.
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
include/linux/b
From: Christoph Hellwig
bio_readpage_error currently uses bi_vcnt to decide if it is worth
retrying an I/O. But the vector count is mostly an implementation
artifact - it really should figure out if there is more than a
single sector worth retrying. Use bi_size for that and shift by
.
bvec_iter_advance() isn't renamed becasue this helper is always operated
on real bvec even though multi-page bvec is supported.
Suggested-by: Christoph Hellwig
Signed-off-by: Ming Lei
---
.clang-format | 2 +-
drivers/md/dm-integrity.c | 2 +-
drivers/md/dm-io.c | 4
ept
not changed
- returned(copied) single-page bvec is built in flight by bvec
helpers from the stored multi-page bvec
Reviewed-by: Omar Sandoval
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 25 -
1 file changed, 20 insertions(+), 5 deletions(-)
diff --git a/include/li
Commit 7759eb23fd980 ("block: remove bio_rewind_iter()") removes
bio_rewind_iter(), then no one uses bvec_iter_rewind() any more,
so remove it.
Signed-off-by: Ming Lei
---
include/linux/bvec.h | 24
1 file changed, 24 deletions(-)
diff --git a/include/linu
segments")
Signed-off-by: Ming Lei
---
block/blk-merge.c | 8 +---
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index e69d8f8ba819..51ec6ca56a0a 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -367,13 +367,7 @@ void blk_re
also affect by setting the maximum segment size and the segment
boundary.
Signed-off-by: Christoph Hellwig
Replace virt boundary with segment boundary limit.
Signed-off-by: Ming Lei
---
block/blk-merge.c | 20
block/blk-settings.c| 3 ---
block/blk-sysfs.c
From: Christoph Hellwig
The btrfs write path passes a bio_offset argument through some deep
callchains including async offloading. In the end this is easily
calculatable using page_offset plus the bvec offset for the first
page in the bio, and only actually used by by a single function.
Just
r repair decisions
block: remove the "cluster" flag
Ming Lei (17):
block: don't use bio->bi_vcnt to figure out segment number
block: remove bvec_iter_rewind()
block: rename bvec helpers
block: introduce multi-page bvec helpers
block: introduce bio_for_each_bvec() and rq_for_eac
On Wed, Nov 21, 2018 at 05:12:06PM +0100, Christoph Hellwig wrote:
> On Wed, Nov 21, 2018 at 11:48:13PM +0800, Ming Lei wrote:
> > I guess the correct check should be:
> >
> > end_addr = vec_addr + bv->bv_offset + bv->bv_len;
&g
On Thu, Nov 22, 2018 at 12:03:15PM +0100, Christoph Hellwig wrote:
> > +/* used for chunk_for_each_segment */
> > +static inline void bvec_next_segment(const struct bio_vec *bvec,
> > +struct bvec_iter_all *iter_all)
>
> FYI, chunk_for_each_segment doesn't exist
On Thu, Nov 22, 2018 at 11:58:49AM +0100, Christoph Hellwig wrote:
> Btw, given that this is the last user of bvec_last_segment after my
> other patches I think we should kill bvec_last_segment and do something
> like this here:
>
>
> diff --git a/fs/buffer.c b/fs/buffer.c
> index
On Thu, Nov 22, 2018 at 11:30:33AM +0100, Christoph Hellwig wrote:
> Btw, this patch instead of the plain rever might make it a little
> more clear what is going on by skipping the confusing helper altogher
> and operating on the raw bvec array:
>
>
> diff --git a/include/linux/bio.h
On Thu, Nov 22, 2018 at 11:41:50AM +0100, Christoph Hellwig wrote:
> On Thu, Nov 22, 2018 at 06:32:09PM +0800, Ming Lei wrote:
> > On Thu, Nov 22, 2018 at 11:04:28AM +0100, Christoph Hellwig wrote:
> > > On Thu, Nov 22, 2018 at 05:33:00PM +0800, Ming Lei wrote:
> > > >
On Thu, Nov 22, 2018 at 11:04:28AM +0100, Christoph Hellwig wrote:
> On Thu, Nov 22, 2018 at 05:33:00PM +0800, Ming Lei wrote:
> > However, using virt boundary limit on non-cluster seems over-kill,
> > because the bio will be over-split(each small bvec may be split as one bio)
>
On Thu, Nov 22, 2018 at 11:04:28AM +0100, Christoph Hellwig wrote:
> On Thu, Nov 22, 2018 at 05:33:00PM +0800, Ming Lei wrote:
> > However, using virt boundary limit on non-cluster seems over-kill,
> > because the bio will be over-split(each small bvec may be split as one bio)
>
On Wed, Nov 21, 2018 at 06:12:17PM +0100, Christoph Hellwig wrote:
> On Wed, Nov 21, 2018 at 05:10:25PM +0100, Christoph Hellwig wrote:
> > No - I think we can always use the code without any segment in
> > bvec_iter_advance. Because bvec_iter_advance only operates on the
> > iteractor, the
On Wed, Nov 21, 2018 at 06:46:21PM +0100, Christoph Hellwig wrote:
> Actually..
>
> I think we can kill this code entirely. If we look at what the
> clustering setting is really about it is to avoid ever merging a
> segement that spans a page boundary. And we should be able to do
> that with
1 - 100 of 181 matches
Mail list logo
