The commit is pushed to "branch-rh7-3.10.0-1062.7.1.vz7.130.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-1062.7.1.vz7.130.15
------>
commit 7f6683ce9e8c7ec4a1ac652c6bc5e047a72e55d4
Author: Kirill Tkhai <ktk...@virtuozzo.com>
Date: Wed Feb 5 12:55:18 2020 +0300
ploop: Introduce .sync_read_many method
The new method to read many pages in one batch request.
Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com>
Patchset description:
Possibility to batch page reads and batch on holes_bitmap population
Submit batch request up to 10 clusters (10Mb, 2560 pages)
during holes_bitmap population to speed up ploop mount
of big images.
https://jira.sw.ru/browse/PSBM-101246
Kirill Tkhai (4):
ploop: Teach dio_sync_io() work with many pages
ploop: Teach kaio_sync_io() work with many pages
ploop: Introduce .sync_read_many method
ploop: Read 10 BAT clusters on holes_bitmap population
---
drivers/block/ploop/io_direct.c | 8 ++++++++
drivers/block/ploop/io_kaio.c | 8 ++++++++
include/linux/ploop/ploop.h | 2 ++
3 files changed, 18 insertions(+)
diff --git a/drivers/block/ploop/io_direct.c b/drivers/block/ploop/io_direct.c
index 5b56fc59da07e..1fa7bfd6a2bbf 100644
--- a/drivers/block/ploop/io_direct.c
+++ b/drivers/block/ploop/io_direct.c
@@ -1207,6 +1207,13 @@ dio_sync_read(struct ploop_io * io, struct page * page,
unsigned int len,
return dio_sync_io(io, READ_SYNC, pages, 1, len, off, pos);
}
+static int dio_sync_read_many(struct ploop_io *io, struct page *pages[],
+ unsigned int nr_pages, sector_t sec)
+{
+ return dio_sync_io(io, READ_SYNC, pages, nr_pages,
+ PAGE_SIZE * nr_pages, 0, sec);
+}
+
static int
dio_sync_write(struct ploop_io * io, struct page * page, unsigned int len,
unsigned int off, sector_t sec)
@@ -1774,6 +1781,7 @@ static struct ploop_io_ops ploop_io_ops_direct =
.write_page = dio_write_page,
.sync_read = dio_sync_read,
.sync_write = dio_sync_write,
+ .sync_read_many = dio_sync_read_many,
.init = dio_init,
.destroy = dio_destroy,
diff --git a/drivers/block/ploop/io_kaio.c b/drivers/block/ploop/io_kaio.c
index c48b80b9785f1..beafc0a68c2ba 100644
--- a/drivers/block/ploop/io_kaio.c
+++ b/drivers/block/ploop/io_kaio.c
@@ -877,6 +877,13 @@ kaio_sync_write(struct ploop_io * io, struct page * page,
unsigned int len,
return ret;
}
+static int kaio_sync_read_many(struct ploop_io *io, struct page *pages[],
+ unsigned int nr_pages, sector_t sec)
+{
+ return kaio_sync_io(io, READ_SYNC, pages, nr_pages,
+ PAGE_SIZE * nr_pages, 0, sec);
+}
+
static int kaio_alloc_sync(struct ploop_io * io, loff_t pos, loff_t len)
{
int err = __kaio_truncate(io, io->files.file, pos + len);
@@ -1160,6 +1167,7 @@ static struct ploop_io_ops ploop_io_ops_kaio =
.write_page = kaio_write_page,
.sync_read = kaio_sync_read,
.sync_write = kaio_sync_write,
+ .sync_read_many = kaio_sync_read_many,
.init = kaio_init,
.destroy = kaio_destroy,
diff --git a/include/linux/ploop/ploop.h b/include/linux/ploop/ploop.h
index 09333e9c34531..66591623f79d0 100644
--- a/include/linux/ploop/ploop.h
+++ b/include/linux/ploop/ploop.h
@@ -178,6 +178,8 @@ struct ploop_io_ops
unsigned int len, unsigned int off, sector_t sec);
int (*sync_write)(struct ploop_io * io, struct page * page,
unsigned int len, unsigned int off, sector_t sec);
+ int (*sync_read_many)(struct ploop_io *io, struct page *pages[],
+ unsigned int nr_pages, sector_t sec);
int (*init)(struct ploop_io * io);
void (*destroy)(struct ploop_io * io);
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