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* [Qemu-devel] [PATCH 00/10] Block layer thread-safety, part 2
@ 2017-06-27 15:22 Paolo Bonzini
  2017-06-27 15:22 ` [Qemu-devel] [PATCH 01/10] qcow2: call CoQueue APIs under CoMutex Paolo Bonzini
                   ` (11 more replies)
  0 siblings, 12 replies; 13+ messages in thread
From: Paolo Bonzini @ 2017-06-27 15:22 UTC (permalink / raw)
  To: qemu-devel; +Cc: stefanha, qemu-block, kwolf

This part takes care of drivers and devices, making sure that they can
accept concurrent I/O from multiple AioContext.

The following drivers are thread-safe without using any QemuMutex/CoMutex:
crypto, gluster, null, rbd, win32-aio.  NBD has already been fixed,
because the patch fixed an unrelated testcase.

The following drivers already use mutexes for everything except possibly
snapshots, which do not (yet?) need protection: bochs, cloop, dmg, qcow,
parallels, vhdx, vmdk, curl, iscsi, nfs.

The following drivers already use mutexes for _almost_ everything: vpc
(missing get_block_status), vdi (missing bitmap access), vvfat (missing
commit), not protected), qcow2 (must call CoQueue APIs under CoMutex).
They are fixed by patches 1-5.

The following drivers must be changed to use CoMutex to protect internal
data: qed (patches 6-8), sheepdog (patch 9).

The following driver must be changed to support I/O from any AioContext:
ssh.  It is fixed by patch 10.

Paolo

Paolo Bonzini (10):
  qcow2: call CoQueue APIs under CoMutex
  coroutine-lock: add qemu_co_rwlock_downgrade and
    qemu_co_rwlock_upgrade
  vdi: make it thread-safe
  vpc: make it thread-safe
  vvfat: make it thread-safe
  qed: move tail of qed_aio_write_main to qed_aio_write_{cow,alloc}
  block: invoke .bdrv_drain callback in coroutine context and from
    AioContext
  qed: protect table cache with CoMutex
  sheepdog: add queue_lock
  ssh: support I/O from any AioContext

 block/io.c                 |  42 +++++++---
 block/qcow2.c              |   4 +-
 block/qed-cluster.c        |   4 +-
 block/qed-l2-cache.c       |   6 ++
 block/qed-table.c          |  24 ++++--
 block/qed.c                | 195 +++++++++++++++++++++++++++------------------
 block/qed.h                |  11 ++-
 block/sheepdog.c           |  21 ++++-
 block/ssh.c                |  24 ++++--
 block/vdi.c                |  48 +++++------
 block/vpc.c                |  20 ++---
 block/vvfat.c              |   8 +-
 include/block/block_int.h  |   2 +-
 include/qemu/coroutine.h   |  18 +++++
 util/qemu-coroutine-lock.c |  35 ++++++++
 15 files changed, 316 insertions(+), 146 deletions(-)

-- 
2.13.0

^ permalink raw reply	[flat|nested] 13+ messages in thread

end of thread, other threads:[~2017-06-28  6:09 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-06-27 15:22 [Qemu-devel] [PATCH 00/10] Block layer thread-safety, part 2 Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 01/10] qcow2: call CoQueue APIs under CoMutex Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 02/10] coroutine-lock: add qemu_co_rwlock_downgrade and qemu_co_rwlock_upgrade Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 03/10] vdi: make it thread-safe Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 04/10] vpc: " Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 05/10] vvfat: " Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 06/10] qed: move tail of qed_aio_write_main to qed_aio_write_{cow, alloc} Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 07/10] block: invoke .bdrv_drain callback in coroutine context and from AioContext Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 08/10] qed: protect table cache with CoMutex Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 09/10] sheepdog: add queue_lock Paolo Bonzini
2017-06-27 15:22 ` [Qemu-devel] [PATCH 10/10] ssh: support I/O from any AioContext Paolo Bonzini
2017-06-27 18:21 ` [Qemu-devel] [PATCH 00/10] Block layer thread-safety, part 2 Paolo Bonzini
2017-06-28  6:08 ` no-reply

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