From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
To: linux-block@vger.kernel.org
Cc: axboe@kernel.dk, hch@lst.de,
Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Subject: [PATCH 7/8] null_blk: add support for configfs write_zeroes
Date: Thu, 11 Jul 2019 10:53:27 -0700 [thread overview]
Message-ID: <20190711175328.16430-8-chaitanya.kulkarni@wdc.com> (raw)
In-Reply-To: <20190711175328.16430-1-chaitanya.kulkarni@wdc.com>
This patch adds a new configfs parameter to enable REQ_OP_WRITE_ZEROES
feature for null_blk similar to REQ_OP_DISCARD when device is memory
backed.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
drivers/block/null_blk_main.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c
index 30cb90553167..c734ddaa697f 100644
--- a/drivers/block/null_blk_main.c
+++ b/drivers/block/null_blk_main.c
@@ -308,6 +308,7 @@ NULLB_DEVICE_ATTR(blocking, bool);
NULLB_DEVICE_ATTR(use_per_node_hctx, bool);
NULLB_DEVICE_ATTR(memory_backed, bool);
NULLB_DEVICE_ATTR(discard, bool);
+NULLB_DEVICE_ATTR(write_zeroes, bool);
NULLB_DEVICE_ATTR(mbps, uint);
NULLB_DEVICE_ATTR(cache_size, ulong);
NULLB_DEVICE_ATTR(zoned, bool);
@@ -423,6 +424,7 @@ static struct configfs_attribute *nullb_device_attrs[] = {
&nullb_device_attr_power,
&nullb_device_attr_memory_backed,
&nullb_device_attr_discard,
+ &nullb_device_attr_write_zeroes,
&nullb_device_attr_mbps,
&nullb_device_attr_cache_size,
&nullb_device_attr_badblocks,
@@ -481,7 +483,7 @@ nullb_group_drop_item(struct config_group *group, struct config_item *item)
static ssize_t memb_group_features_show(struct config_item *item, char *page)
{
- return snprintf(page, PAGE_SIZE, "memory_backed,discard,bandwidth,cache,badblocks,zoned,zone_size\n");
+ return snprintf(page, PAGE_SIZE, "memory_backed,discard,write_zeroes,bandwidth,cache,badblocks,zoned,zone_size\n");
}
CONFIGFS_ATTR_RO(memb_group_, features);
--
2.17.0
next prev parent reply other threads:[~2019-07-11 17:54 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-11 17:53 [PATCH 0/8] null_blk: add missing write-zeroes and discard support Chaitanya Kulkarni
2019-07-11 17:53 ` [PATCH 1/8] null_blk: add module parameter for REQ_OP_DISCARD Chaitanya Kulkarni
2019-07-28 6:04 ` Minwoo Im
2019-07-30 4:48 ` Chaitanya Kulkarni
2019-07-11 17:53 ` [PATCH 2/8] null_blk: add REQ_OP_WRITE_ZEROES config property Chaitanya Kulkarni
2019-07-28 6:17 ` Minwoo Im
2019-07-11 17:53 ` [PATCH 3/8] null_blk: add support for write-zeroes Chaitanya Kulkarni
2019-07-28 6:08 ` Minwoo Im
2019-07-11 17:53 ` [PATCH 4/8] null_blk: allow memory-backed write-zeroes-req Chaitanya Kulkarni
2019-07-28 6:11 ` Minwoo Im
2019-07-11 17:53 ` [PATCH 5/8] null_blk: code cleaup Chaitanya Kulkarni
2019-07-28 6:12 ` Minwoo Im
2019-07-11 17:53 ` [PATCH 6/8] null_blk: allow memory-backed write-zeroes-bio Chaitanya Kulkarni
2019-07-28 6:18 ` Minwoo Im
2019-07-11 17:53 ` Chaitanya Kulkarni [this message]
2019-07-11 17:53 ` [PATCH 8/8] null_blk: adjusts the code with latest changes Chaitanya Kulkarni
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190711175328.16430-8-chaitanya.kulkarni@wdc.com \
--to=chaitanya.kulkarni@wdc.com \
--cc=axboe@kernel.dk \
--cc=hch@lst.de \
--cc=linux-block@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).