[v1] io: follow coroutine AioContext in qio_channel_yield()

[PATCH 0/2] io: follow coroutine AioContext in qio_channel_yield()

Stefan Hajnoczi posted 2 patches 1 year, 3 months ago

Diff against v2 v3
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git fetch https://github.com/patchew-project/qemu tags/patchew/20230823234504.1387239-1-stefanha@redhat.com

Maintainers: Eric Blake <eblake@redhat.com>, Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>, Kevin Wolf <kwolf@redhat.com>, Hanna Reitz <hreitz@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Coiby Xu <Coiby.Xu@gmail.com>, Juan Quintela <quintela@redhat.com>, Peter Xu <peterx@redhat.com>, Leonardo Bras <leobras@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Fam Zheng <fam@euphon.net>

There is a newer version of this series

include/io/channel.h             |  34 ++++++++-
include/qemu/vhost-user-server.h |   1 +
block/nbd.c                      |  11 +--
io/channel-command.c             |  13 +++-
io/channel-file.c                |  18 ++++-
io/channel-null.c                |   3 +-
io/channel-socket.c              |  18 ++++-
io/channel-tls.c                 |   6 +-
io/channel.c                     | 124 ++++++++++++++++++++++---------
migration/channel-block.c        |   3 +-
nbd/client.c                     |   2 +-
nbd/server.c                     |  14 +---
scsi/qemu-pr-helper.c            |   4 +-
util/vhost-user-server.c         |  27 +++++--
14 files changed, 195 insertions(+), 83 deletions(-)

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[PATCH 0/2] io: follow coroutine AioContext in qio_channel_yield()

Posted by Stefan Hajnoczi 1 year, 3 months ago

The ongoing QEMU multi-queue block layer effort makes it possible for multiple
threads to process I/O in parallel. The nbd block driver is not compatible with
the multi-queue block layer yet because QIOChannel cannot be used easily from
coroutines running in multiple threads. This series changes the QIOChannel API
to make that possible.

Stefan Hajnoczi (2):
  io: check there are no qio_channel_yield() coroutines during
    ->finalize()
  io: follow coroutine AioContext in qio_channel_yield()

 include/io/channel.h             |  34 ++++++++-
 include/qemu/vhost-user-server.h |   1 +
 block/nbd.c                      |  11 +--
 io/channel-command.c             |  13 +++-
 io/channel-file.c                |  18 ++++-
 io/channel-null.c                |   3 +-
 io/channel-socket.c              |  18 ++++-
 io/channel-tls.c                 |   6 +-
 io/channel.c                     | 124 ++++++++++++++++++++++---------
 migration/channel-block.c        |   3 +-
 nbd/client.c                     |   2 +-
 nbd/server.c                     |  14 +---
 scsi/qemu-pr-helper.c            |   4 +-
 util/vhost-user-server.c         |  27 +++++--
 14 files changed, 195 insertions(+), 83 deletions(-)

-- 
2.41.0