[v4] nbd: reduce max_block restrictions

[PATCH v4 0/4] nbd: reduce max_block restrictions

Vladimir Sementsov-Ogievskiy posted 4 patches 3 years, 10 months ago

Diff against v1 v2 v3
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git fetch https://github.com/patchew-project/qemu tags/patchew/20200611162655.4538-1-vsementsov@virtuozzo.com

Maintainers: Stefan Hajnoczi <stefanha@redhat.com>, Fam Zheng <fam@euphon.net>, Kevin Wolf <kwolf@redhat.com>, Max Reitz <mreitz@redhat.com>, Eric Blake <eblake@redhat.com>

include/block/block_int.h |  8 ++++++++
block/io.c                | 40 +++++++++++++++++++++++++++++++++------
block/nbd.c               |  1 +
3 files changed, 43 insertions(+), 6 deletions(-)

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[PATCH v4 0/4] nbd: reduce max_block restrictions

Posted by Vladimir Sementsov-Ogievskiy 3 years, 10 months ago

Recent changes in NBD protocol allowed to use some commands without
max_block restriction. Let's drop the restrictions.

NBD change is here:
https://github.com/NetworkBlockDevice/nbd/commit/9f30fedb8699f151e7ef4ccc07e624330be3316b#diff-762fb7c670348da69cc9050ef58fe3ae

v4: fix auto_no_fallback variable usage in 04:
    - initialize it
    - unset it on error
    Hope, it will fix bug reported by patchew

Vladimir Sementsov-Ogievskiy (4):
  block: add max_pwrite_zeroes_fast to BlockLimits
  block/nbd: define new max_write_zero_fast limit
  block/io: refactor bdrv_co_do_pwrite_zeroes head calculation
  block/io: auto-no-fallback for write-zeroes

 include/block/block_int.h |  8 ++++++++
 block/io.c                | 40 +++++++++++++++++++++++++++++++++------
 block/nbd.c               |  1 +
 3 files changed, 43 insertions(+), 6 deletions(-)

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2.21.0