From: Ivan Kozik <ivan@ludios.org>
To: Ming Lei <ming.lei@redhat.com>
Cc: axboe@kernel.dk, paolo.valente@linaro.org,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
oleksandr@natalenko.name
Subject: Re: blk-mq + bfq IO hangs after writing partition table
Date: Fri, 1 Dec 2017 12:18:25 +0000 [thread overview]
Message-ID: <CAKynti+h_-MuR7YXsiYHqTv7xCiy1QhRUyu=zCcb9brwR2ByxQ@mail.gmail.com> (raw)
In-Reply-To: <20171201085051.GA1308@ming.t460p>
[-- Attachment #1: Type: text/plain, Size: 6530 bytes --]
On Fri, Dec 1, 2017 at 8:50 AM, Ming Lei <ming.lei@redhat.com> wrote:
> Could you run the following script[1] and provide us the result after
> the IO hang is triggered?
>
> #./dump-blk-info /dev/sdX #/dev/sdX is name of your USB disk
>
> [1] http://people.redhat.com/minlei/tests/tools/dump-blk-info
Hi Ming,
Thanks for taking a look. I have pasted and attached (in case of
gmail corruption) these files:
Samsung-128GB-before: Samsung 128GB USB 3.0 Fit plugged into HP 8460p,
before gdisk write
Samsung-128GB-after: Samsung 128GB USB 3.0 Fit plugged into HP 8460p,
after gdisk write
Generic-4GB-after: some awful generic but working 4GB USB flash
drive plugged into HP 8460p, after gdisk write
I have reproduced this again on the same kernel revision and blk-mq bfq with:
minimized cmdline: scsi_mod.use_blk_mq=y
gdisk writing the partition table as-is, no changes
and confirmed again that kyber never triggers this.
Thanks,
Ivan
Samsung-128GB-before
=============sdc/hctx0==================
$active
0
$busy
$/sys/kernel/debug/block/sdc//hctx0/cpu0
$completed
3 14
$dispatched
3 14
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu1
$completed
159 76
$dispatched
159 76
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu2
$completed
84 57
$dispatched
84 57
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu3
$completed
154 54
$dispatched
155 54
$merged
1
$rq_list
$ctx_map
00000000: 00
$dispatch
$dispatched
0 8
1 701
2 0
4 0
8 0
16 0
32+ 0
$flags
alloc_policy=FIFO SHOULD_MERGE|SG_MERGE
$io_poll
considered=0
invoked=0
success=0
$queued
602
$run
843
$sched_tags
nr_tags=2
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=2
busy=1
bits_per_word=64
map_nr=1
alloc_hint={0, 1, 0, 0, 0, 1, 1, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$sched_tags_bitmap
00000000: 01
$state
$tags
nr_tags=1
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=1
busy=0
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 0, 0, 0, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$tags_bitmap
00000000: 00
Samsung-128GB-after
=============sdc/hctx0==================
$active
0
$busy
$/sys/kernel/debug/block/sdc//hctx0/cpu0
$completed
3 14
$dispatched
3 14
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu1
$completed
159 95
$dispatched
159 96
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu2
$completed
84 58
$dispatched
84 58
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu3
$completed
154 54
$dispatched
155 54
$merged
1
$rq_list
$ctx_map
00000000: 00
$dispatch
$dispatched
0 8
1 721
2 0
4 0
8 0
16 0
32+ 0
$flags
alloc_policy=FIFO SHOULD_MERGE|SG_MERGE
$io_poll
considered=0
invoked=0
success=0
$queued
623
$run
887
$sched_tags
nr_tags=2
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=2
busy=2
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 0, 1, 1, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$sched_tags_bitmap
00000000: 03
$state
$tags
nr_tags=1
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=1
busy=0
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 0, 0, 0, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$tags_bitmap
00000000: 00
Generic-4GB-after
=============sdc/hctx0==================
$active
0
$busy
$/sys/kernel/debug/block/sdc//hctx0/cpu0
$completed
94 32
$dispatched
94 33
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu1
$completed
561 113
$dispatched
562 113
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu2
$completed
251 179
$dispatched
251 179
$merged
4
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu3
$completed
228 63
$dispatched
228 63
$merged
0
$rq_list
$ctx_map
00000000: 00
$dispatch
$dispatched
0 21
1 1707
2 0
4 0
8 0
16 0
32+ 0
$flags
alloc_policy=FIFO SHOULD_MERGE|SG_MERGE
$io_poll
considered=0
invoked=0
success=0
$queued
1523
$run
2000
$sched_tags
nr_tags=2
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=2
busy=2
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 1, 1, 0, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$sched_tags_bitmap
00000000: 03
$state
$tags
nr_tags=1
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=1
busy=0
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 0, 0, 0, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$tags_bitmap
00000000: 00
[-- Attachment #2: Generic-4GB-after --]
[-- Type: application/octet-stream, Size: 1691 bytes --]
=============sdc/hctx0==================
$active
0
$busy
$/sys/kernel/debug/block/sdc//hctx0/cpu0
$completed
94 32
$dispatched
94 33
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu1
$completed
561 113
$dispatched
562 113
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu2
$completed
251 179
$dispatched
251 179
$merged
4
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu3
$completed
228 63
$dispatched
228 63
$merged
0
$rq_list
$ctx_map
00000000: 00
$dispatch
$dispatched
0 21
1 1707
2 0
4 0
8 0
16 0
32+ 0
$flags
alloc_policy=FIFO SHOULD_MERGE|SG_MERGE
$io_poll
considered=0
invoked=0
success=0
$queued
1523
$run
2000
$sched_tags
nr_tags=2
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=2
busy=2
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 1, 1, 0, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$sched_tags_bitmap
00000000: 03
$state
$tags
nr_tags=1
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=1
busy=0
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 0, 0, 0, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$tags_bitmap
00000000: 00
[-- Attachment #3: Samsung-128GB-after --]
[-- Type: application/octet-stream, Size: 1679 bytes --]
=============sdc/hctx0==================
$active
0
$busy
$/sys/kernel/debug/block/sdc//hctx0/cpu0
$completed
3 14
$dispatched
3 14
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu1
$completed
159 95
$dispatched
159 96
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu2
$completed
84 58
$dispatched
84 58
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu3
$completed
154 54
$dispatched
155 54
$merged
1
$rq_list
$ctx_map
00000000: 00
$dispatch
$dispatched
0 8
1 721
2 0
4 0
8 0
16 0
32+ 0
$flags
alloc_policy=FIFO SHOULD_MERGE|SG_MERGE
$io_poll
considered=0
invoked=0
success=0
$queued
623
$run
887
$sched_tags
nr_tags=2
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=2
busy=2
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 0, 1, 1, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=active},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$sched_tags_bitmap
00000000: 03
$state
$tags
nr_tags=1
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=1
busy=0
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 0, 0, 0, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$tags_bitmap
00000000: 00
[-- Attachment #4: Samsung-128GB-before --]
[-- Type: application/octet-stream, Size: 1685 bytes --]
=============sdc/hctx0==================
$active
0
$busy
$/sys/kernel/debug/block/sdc//hctx0/cpu0
$completed
3 14
$dispatched
3 14
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu1
$completed
159 76
$dispatched
159 76
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu2
$completed
84 57
$dispatched
84 57
$merged
0
$rq_list
$/sys/kernel/debug/block/sdc//hctx0/cpu3
$completed
154 54
$dispatched
155 54
$merged
1
$rq_list
$ctx_map
00000000: 00
$dispatch
$dispatched
0 8
1 701
2 0
4 0
8 0
16 0
32+ 0
$flags
alloc_policy=FIFO SHOULD_MERGE|SG_MERGE
$io_poll
considered=0
invoked=0
success=0
$queued
602
$run
843
$sched_tags
nr_tags=2
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=2
busy=1
bits_per_word=64
map_nr=1
alloc_hint={0, 1, 0, 0, 0, 1, 1, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$sched_tags_bitmap
00000000: 01
$state
$tags
nr_tags=1
nr_reserved_tags=0
active_queues=0
bitmap_tags:
depth=1
busy=0
bits_per_word=64
map_nr=1
alloc_hint={0, 0, 0, 0, 0, 0, 0, 0}
wake_batch=1
wake_index=0
ws={
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
{.wait_cnt=1, .wait=inactive},
}
round_robin=0
$tags_bitmap
00000000: 00
next prev parent reply other threads:[~2017-12-01 12:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-01 6:52 blk-mq + bfq IO hangs after writing partition table ivan
2017-12-01 8:50 ` Ming Lei
2017-12-01 12:18 ` Ivan Kozik [this message]
2017-12-01 13:35 ` Ming Lei
2017-12-01 14:46 ` Ivan Kozik
2017-12-01 15:33 ` Ming Lei
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='CAKynti+h_-MuR7YXsiYHqTv7xCiy1QhRUyu=zCcb9brwR2ByxQ@mail.gmail.com' \
--to=ivan@ludios.org \
--cc=axboe@kernel.dk \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=ming.lei@redhat.com \
--cc=oleksandr@natalenko.name \
--cc=paolo.valente@linaro.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.