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SubjectRe: [PATCHSET v6] blk-mq scheduling framework
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> Il giorno 11 gen 2017, alle ore 22:39, Jens Axboe <axboe@fb.com> ha scritto:
>
> Another year, another posting of this patchset. The previous posting
> was here:
>
> https://www.spinics.net/lists/kernel/msg2406106.html
>
> (yes, I've skipped v5, it was fixes on top of v4, not the rework).
>
> I've reworked bits of this to get rid of the shadow requests, thanks
> to Bart for the inspiration. The missing piece, for me, was the fact
> that we have the tags->rqs[] indirection array already. I've done this
> somewhat differently, though, by having the internal scheduler tag
> map be allocated/torn down when an IO scheduler is attached or
> detached. This also means that when we run without a scheduler, we
> don't have to do double tag allocations, it'll work like before.
>
> The patchset applies on top of 4.10-rc3, or can be pulled here:
>
> git://git.kernel.dk/linux-block blk-mq-sched.6
>
>

Hi Jens,
I have checked this new version to find solutions to the apparent
errors, mistakes or just unclear parts (to me) that I have pointed out
before Christmas last year. But I have found no changes related to
these problems.

As I have already written, I'm willing to try to fix those errors
myself, if they really are errors, but I would first need at least
some minimal initial feedback and guidance. If needed, tell me how I
can help you get in sync again with these issues (sending my reports
again, sending a digest of them, ...).

Thanks,
Paolo

> block/Kconfig.iosched | 50 ++++
> block/Makefile | 3
> block/blk-core.c | 19 -
> block/blk-exec.c | 3
> block/blk-flush.c | 15 -
> block/blk-ioc.c | 12
> block/blk-merge.c | 4
> block/blk-mq-sched.c | 354 +++++++++++++++++++++++++++++
> block/blk-mq-sched.h | 157 ++++++++++++
> block/blk-mq-sysfs.c | 13 +
> block/blk-mq-tag.c | 58 ++--
> block/blk-mq-tag.h | 4
> block/blk-mq.c | 413 +++++++++++++++++++---------------
> block/blk-mq.h | 40 +++
> block/blk-tag.c | 1
> block/blk.h | 26 +-
> block/cfq-iosched.c | 2
> block/deadline-iosched.c | 2
> block/elevator.c | 247 +++++++++++++++-----
> block/mq-deadline.c | 569 +++++++++++++++++++++++++++++++++++++++++++++++
> block/noop-iosched.c | 2
> drivers/nvme/host/pci.c | 1
> include/linux/blk-mq.h | 9
> include/linux/blkdev.h | 6
> include/linux/elevator.h | 36 ++
> 25 files changed, 1732 insertions(+), 314 deletions(-)
>
> --
> Jens Axboe
>
> --
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