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From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org
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Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Subject: [PATCH 0/4] block: introduce REQ_OP_ZONE_RESET_ALL
Date: Wed, 31 Jul 2019 14:00:58 -0700
Message-Id: <20190731210102.3472-1-chaitanya.kulkarni@wdc.com>
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| Series |
block: introduce REQ_OP_ZONE_RESET_ALL
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expand
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Hi, In current implementation Zoned block device issues one bio at a time based on the range of the offset and zones specified from userspace tools like blkzone. Worst case scenario it will issue N requests which are equal to the number of the zones when the application wants to reset the drive, e.g. mkfs. Zone Block devices allow issuing zone reset all operation [1] which can essentially reset all the available zones with only one command. This patch series introduces new REQ_OP_ZONE_RESET_ALL operation. Along with that, we also introduce QUEUE_FLAG_ZONE_RESETALL (and respective helpers) which is needed to be set by the low-level driver in order to enable the REQ_OP_ZONE_RESET_ALL. In this series we implement the REQ_OP_ZONE_RESET_ALL for sd and null_blk block drivers. Following is the performance difference measured for null_blk when configured with 16TB size with zone size = 64MB for collecting the overhead only for the Linux Block Layer. Please note that this doesn't include any device overhead which will be additional on the top of these numbers. # modprobe null_blk zone_size=64 gb=16384 nr_devices=1 zoned=1 # for i in 1 2 3 4 5 ; do time blkzone reset /dev/nullb0 ; done ------------------------------------------------------ | Time | REQ_OP_ZONE_RESET | REQ_OP_ZONE_RESET_ALL | ------------------------------------------------------ | real | 0m4.622s| 0m0.014s| | user | 0m0.000s| 0m0.000s| | sys | 0m2.762s| 0m0.011s| |---------------------------------------------------| | real | 0m4.565s| 0m0.013s| | user | 0m0.000s| 0m0.000s| | sys | 0m2.729s| 0m0.010s| |---------------------------------------------------| | real | 0m4.536s| 0m0.013s| | user | 0m0.001s| 0m0.000s| | sys | 0m2.703s| 0m0.011s| |---------------------------------------------------| | real | 0m4.619s| 0m0.013s| | user | 0m0.001s| 0m0.002s| | sys | 0m2.759s| 0m0.009s| |---------------------------------------------------| | real | 0m4.529s| 0m0.012s| | user | 0m0.002s| 0m0.000s| | sys | 0m2.696s| 0m0.010s| ------------------------------------------------------ In case anyone is interested please have a look at the test log. We mainly test 4 scenarios:- 1. TCMU-Runner REQ_OP_ZONE_RESET :- Issue zone reset in reverse order and observe the zone report cmd wptr. This scenario should translate into issuing N block layer REQ_OP_ZONE_RESET requests. On success Zone write pointer values should be set to 0x0 in the blkzone report command in the reverse order. (blkzone -o ${zone_start_offset} ${DEV}) 2. TCMU-Runner REQ_OP_ZONE_RESET_ALL :- Issue zone reset with the length of the device, this should translate into the REQ_OP_ZONE_RESET_ALL and observe the zone report cmd wptr. (blkzone reset ${DEV}) 3. Test for null_blk REQ_OP_ZONE_RESET :- Same as #1. 4. Test for null_blk REQ_OP_ZONE_RESET_ALL :- Same as #2. Chaitanya Kulkarni (4): block: add req op to reset all zones and flag blk-zoned: implement REQ_OP_ZONE_RESET_ALL scsi: implement REQ_OP_ZONE_RESET_ALL null_blk: implement REQ_OP_ZONE_RESET_ALL block/blk-core.c | 5 +++++ block/blk-zoned.c | 40 ++++++++++++++++++++++++++++++++++ drivers/block/null_blk_main.c | 3 +++ drivers/block/null_blk_zoned.c | 28 +++++++++++++++++++----- drivers/scsi/sd.c | 7 +++++- drivers/scsi/sd.h | 5 +++-- drivers/scsi/sd_zbc.c | 9 ++++++-- include/linux/blk_types.h | 2 ++ include/linux/blkdev.h | 3 +++ 9 files changed, 91 insertions(+), 11 deletions(-) Following are the test results for the null_blk and tcmu-runner based sd device :- 1. TCMU-Runner REQ_OP_ZONE_RESET:- a. Populate the zones :- # ./reset_all_test.sh /dev/sdd dd if=/dev/zero of=/dev/sdd bs=4096 count=1 seek=0 dd if=/dev/zero of=/dev/sdd bs=4096 count=2 seek=32768 dd if=/dev/zero of=/dev/sdd bs=4096 count=4 seek=65536 dd if=/dev/zero of=/dev/sdd bs=4096 count=8 seek=98304 dd if=/dev/zero of=/dev/sdd bs=4096 count=16 seek=131072 dd if=/dev/zero of=/dev/sdd bs=4096 count=32 seek=163840 dd if=/dev/zero of=/dev/sdd bs=4096 count=64 seek=196608 dd if=/dev/zero of=/dev/sdd bs=4096 count=128 seek=229376 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000100 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000200 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000400 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] b. Now Issue zone reset (REQ_OP_ZONE_RESET) starting from the last zone to the 0rth and report zones :- Starting REQ_OP_ZONE_RESET test :- blkzone reset -o 1835008 /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000100 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000200 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 7 :- REQ_OP_ZONE_RESET : Pass --------------------------------------------------------------- blkzone reset -o 1572864 /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000100 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 6 :- REQ_OP_ZONE_RESET : Pass --------------------------------------------------------------- blkzone reset -o 1310720 /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 5 :- REQ_OP_ZONE_RESET : Pass --------------------------------------------------------------- blkzone reset -o 1048576 /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 4 :- REQ_OP_ZONE_RESET : Pass --------------------------------------------------------------- blkzone reset -o 786432 /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 3 :- REQ_OP_ZONE_RESET : Pass --------------------------------------------------------------- blkzone reset -o 524288 /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 2 :- REQ_OP_ZONE_RESET : Pass --------------------------------------------------------------- blkzone reset -o 262144 /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 1 :- REQ_OP_ZONE_RESET : Pass --------------------------------------------------------------- blkzone reset -o 0 /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 0 :- REQ_OP_ZONE_RESET : Pass --------------------------------------------------------------- 2. TCMU-Runner REQ_OP_ZONE_RESET_ALL:- a. Populate the zones :- dd if=/dev/zero of=/dev/sdd bs=4096 count=1 seek=0 dd if=/dev/zero of=/dev/sdd bs=4096 count=2 seek=32768 dd if=/dev/zero of=/dev/sdd bs=4096 count=4 seek=65536 dd if=/dev/zero of=/dev/sdd bs=4096 count=8 seek=98304 dd if=/dev/zero of=/dev/sdd bs=4096 count=16 seek=131072 dd if=/dev/zero of=/dev/sdd bs=4096 count=32 seek=163840 dd if=/dev/zero of=/dev/sdd bs=4096 count=64 seek=196608 dd if=/dev/zero of=/dev/sdd bs=4096 count=128 seek=229376 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 4(cl) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000100 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000200 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000400 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] ------------------------------------------------- b. Issue REQ_OP_ZONE_RESET_ALL and report :- blkzone reset /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] REQ_OP_ZONE_RESET_ALL : Pass # 3. Test for null_blk (REQ_OP_ZONE_RESET) :- a. Load the null_blk and populate the zones :- # modprobe null_blk zoned=1 zone_size=128 gb=1 bs=4096 # ./reset_all_test.sh /dev/nullb0 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=1 seek=0 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=2 seek=32768 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=4 seek=65536 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=8 seek=98304 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=16 seek=131072 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=32 seek=163840 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=64 seek=196608 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=128 seek=229376 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000100 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000200 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000400 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] b. Now Issue zone reset (REQ_OP_ZONE_RESET) starting from the last zone to the 0rth and report zones :- Starting REQ_OP_ZONE_RESET test :- blkzone reset -o 1835008 /dev/nullb0 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000100 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000200 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 7 :- --------------------------------------------------------------- blkzone reset -o 1572864 /dev/nullb0 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000100 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 6 :- --------------------------------------------------------------- blkzone reset -o 1310720 /dev/nullb0 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 5 :- --------------------------------------------------------------- blkzone reset -o 1048576 /dev/nullb0 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 4 :- --------------------------------------------------------------- blkzone reset -o 786432 /dev/nullb0 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 3 :- --------------------------------------------------------------- blkzone reset -o 524288 /dev/nullb0 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 2 :- --------------------------------------------------------------- blkzone reset -o 262144 /dev/nullb0 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 1 :- --------------------------------------------------------------- blkzone reset -o 0 /dev/nullb0 start: 0x000000000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] ZONEID 0 :- --------------------------------------------------------------- 4. Test for null_blk (REQ_OP_ZONE_RESET_ALL) :- a. Populate the zones :- dd if=/dev/zero of=/dev/nullb0 bs=4096 count=1 seek=0 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=2 seek=32768 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=4 seek=65536 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=8 seek=98304 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=16 seek=131072 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=32 seek=163840 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=64 seek=196608 dd if=/dev/zero of=/dev/nullb0 bs=4096 count=128 seek=229376 start: 0x000000000, len 0x040000, wptr 0x000008 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000010 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000020 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000040 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000080 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000100 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000200 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000400 reset:0 non-seq:0, zcond: 2(oi) [type: 2(SEQ_WRITE_REQUIRED)] ------------------------------------------------- b. Issue REQ_OP_ZONE_RESET_ALL and report :- blkzone reset /dev/sdd start: 0x000000000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000040000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000080000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0000c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000100000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000140000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x000180000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] start: 0x0001c0000, len 0x040000, wptr 0x000000 reset:0 non-seq:0, zcond: 1(em) [type: 2(SEQ_WRITE_REQUIRED)] #