From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
To: axboe@kernel.dk, damien.lemoal@wdc.com
Cc: kbusch@kernel.org, linux-block@vger.kernel.org,
Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Subject: [PATCH 0/3] null_blk: add tracnepoints for zoned mode
Date: Fri, 14 Feb 2020 16:57:55 -0800 [thread overview]
Message-ID: <20200215005758.3212-1-chaitanya.kulkarni@wdc.com> (raw)
Hi,
Recently we've added several new operations for zoned block devices
blk-zone.c ZBD). These operations have a direct effect on the
zone-state machine present in the null_blk_zoned.c.
This will allow us to add new testcases in blktests in order to verify
the correct operations on the driver side.
This is a small patch series which adds tracepoints for the null_blk
block driver when configured in a zoned mode (with command line
parameter zoned=1).
The first patch is a prep patch that adds a helper to stringify zone
conditions which we use in the trace, the second patch adds new
tracepoint definitions and the third patch allows null_blk_zoned to
trace operations.
Please have a look at the end for sample output.
P.S. I've kept the helper function blk_zone_cond_str() into header
file, please let me know if it needs to be in the blk-zoned.c.
Regards,
Chaitanya
Chaitanya Kulkarni (3):
block: add zone condition debug helpers
null_blk: add tracepoint helpers for zoned mode
null_blk: add trace in null_blk_zoned.c
block/blk-zoned.c | 14 ++++++
drivers/block/Makefile | 3 ++
drivers/block/null_blk_trace.c | 20 +++++++++
drivers/block/null_blk_trace.h | 78 ++++++++++++++++++++++++++++++++++
drivers/block/null_blk_zoned.c | 12 +++++-
include/linux/blkdev.h | 26 ++++++++++++
include/uapi/linux/blkzoned.h | 1 +
7 files changed, 153 insertions(+), 1 deletion(-)
create mode 100644 drivers/block/null_blk_trace.c
create mode 100644 drivers/block/null_blk_trace.h
Sample Test Output :-
# modprobe null_blk zoned=1 zone_size=128 gb=1 bs=4096
# cd /sys/kernel/debug/tracing/
# echo 1 > events/nullb/enable; cat trace_pipe
# for i in open close finish reset; do blkzone $i /dev/nullb0; done
# dd if=/dev/zero of=/dev/nullb0 bs=4k count=5
nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=0 zone_cond=EXP_OPEN
nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=1 zone_cond=EXP_OPEN
nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=2 zone_cond=EXP_OPEN
nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=3 zone_cond=EXP_OPEN
nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=4 zone_cond=EXP_OPEN
nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=5 zone_cond=EXP_OPEN
nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=6 zone_cond=EXP_OPEN
nullb_zone_op: disk=nullb0, req=ZONE_OPEN zone_no=7 zone_cond=EXP_OPEN
nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=0 zone_cond=EMPTY
nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=1 zone_cond=EMPTY
nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=2 zone_cond=EMPTY
nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=3 zone_cond=EMPTY
nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=4 zone_cond=EMPTY
nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=5 zone_cond=EMPTY
nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=6 zone_cond=EMPTY
nullb_zone_op: disk=nullb0, req=ZONE_CLOSE zone_no=7 zone_cond=EMPTY
nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=0 zone_cond=FULL
nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=1 zone_cond=FULL
nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=2 zone_cond=FULL
nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=3 zone_cond=FULL
nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=4 zone_cond=FULL
nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=5 zone_cond=FULL
nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=6 zone_cond=FULL
nullb_zone_op: disk=nullb0, req=ZONE_FINISH zone_no=7 zone_cond=FULL
nullb_zone_op: disk=nullb0, req=ZONE_RESET_ALL zone_no=0 zone_cond=EMPTY
nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN
nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN
nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN
nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN
nullb_zone_op: disk=nullb0, req=WRITE zone_no=0 zone_cond=IMP_OPEN
--
2.22.1
next reply other threads:[~2020-02-15 0:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-15 0:57 Chaitanya Kulkarni [this message]
2020-02-15 0:57 ` [PATCH 1/3] block: add a zone condition debug helper Chaitanya Kulkarni
2020-02-17 0:54 ` Damien Le Moal
2020-02-15 0:57 ` [PATCH 2/3] null_blk: add tracepoint helpers for zoned mode Chaitanya Kulkarni
2020-02-17 1:04 ` Damien Le Moal
2020-02-15 0:57 ` [PATCH 3/3] null_blk: add trace in null_blk_zoned.c Chaitanya Kulkarni
2020-02-17 1:05 ` Damien Le Moal
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=20200215005758.3212-1-chaitanya.kulkarni@wdc.com \
--to=chaitanya.kulkarni@wdc.com \
--cc=axboe@kernel.dk \
--cc=damien.lemoal@wdc.com \
--cc=kbusch@kernel.org \
--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).