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Subject[PATCH RFC PKS/PMEM 07/58] drivers/drbd: Utilize new kmap_thread()
Date
From: Ira Weiny <ira.weiny@intel.com>

The kmap() calls in this driver are localized to a single thread. To
avoid the over head of global PKRS updates use the new kmap_thread()
call.

Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
drivers/block/drbd/drbd_main.c | 4 ++--
drivers/block/drbd/drbd_receiver.c | 12 ++++++------
2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 573dbf6f0c31..f0d0c6b0745e 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1532,9 +1532,9 @@ static int _drbd_no_send_page(struct drbd_peer_device *peer_device, struct page
int err;

socket = peer_device->connection->data.socket;
- addr = kmap(page) + offset;
+ addr = kmap_thread(page) + offset;
err = drbd_send_all(peer_device->connection, socket, addr, size, msg_flags);
- kunmap(page);
+ kunmap_thread(page);
if (!err)
peer_device->device->send_cnt += size >> 9;
return err;
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 422363daa618..4704bc0564e2 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1951,13 +1951,13 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector,
page = peer_req->pages;
page_chain_for_each(page) {
unsigned len = min_t(int, ds, PAGE_SIZE);
- data = kmap(page);
+ data = kmap_thread(page);
err = drbd_recv_all_warn(peer_device->connection, data, len);
if (drbd_insert_fault(device, DRBD_FAULT_RECEIVE)) {
drbd_err(device, "Fault injection: Corrupting data on receive\n");
data[0] = data[0] ^ (unsigned long)-1;
}
- kunmap(page);
+ kunmap_thread(page);
if (err) {
drbd_free_peer_req(device, peer_req);
return NULL;
@@ -1992,7 +1992,7 @@ static int drbd_drain_block(struct drbd_peer_device *peer_device, int data_size)

page = drbd_alloc_pages(peer_device, 1, 1);

- data = kmap(page);
+ data = kmap_thread(page);
while (data_size) {
unsigned int len = min_t(int, data_size, PAGE_SIZE);

@@ -2001,7 +2001,7 @@ static int drbd_drain_block(struct drbd_peer_device *peer_device, int data_size)
break;
data_size -= len;
}
- kunmap(page);
+ kunmap_thread(page);
drbd_free_pages(peer_device->device, page, 0);
return err;
}
@@ -2033,10 +2033,10 @@ static int recv_dless_read(struct drbd_peer_device *peer_device, struct drbd_req
D_ASSERT(peer_device->device, sector == bio->bi_iter.bi_sector);

bio_for_each_segment(bvec, bio, iter) {
- void *mapped = kmap(bvec.bv_page) + bvec.bv_offset;
+ void *mapped = kmap_thread(bvec.bv_page) + bvec.bv_offset;
expect = min_t(int, data_size, bvec.bv_len);
err = drbd_recv_all_warn(peer_device->connection, mapped, expect);
- kunmap(bvec.bv_page);
+ kunmap_thread(bvec.bv_page);
if (err)
return err;
data_size -= expect;
--
2.28.0.rc0.12.gb6a658bd00c9
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