block-ram-registrar: reset when the graph changes

[PATCH 0/3] block-ram-registrar: reset when the graph changes

Stefan Hajnoczi posted 3 patches 1 year, 3 months ago

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Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20230104220631.110321-1-stefanha@redhat.com

Maintainers: Kevin Wolf <kwolf@redhat.com>, Hanna Reitz <hreitz@redhat.com>

include/block/block_int-common.h            |  8 +++
include/sysemu/block-backend-global-state.h | 10 +++
block.c                                     | 34 +++++++++
block/block-backend.c                       | 79 +++++++++++++++++++++
block/block-ram-registrar.c                 | 40 +++++++++--
block/trace-events                          |  2 +
6 files changed, 168 insertions(+), 5 deletions(-)

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[PATCH 0/3] block-ram-registrar: reset when the graph changes

Posted by Stefan Hajnoczi 1 year, 3 months ago

Kevin pointed out that block-ram-registrar doesn't handle graph changes. New
nodes must have all of guest RAM registered before they can process I/O
requests with BDRV_REQ_REGISTERED_BUF.

These patches add a mechanism for monitoring graph changes and use it to
refresh registered buffers in block-ram-registrar.

Stefan Hajnoczi (3):
  block: add BdrvChildClass->pre_detach() and ->post_attach()
  block-backend: add graph change notifier API
  block-ram-registrar: reset when the graph changes

 include/block/block_int-common.h            |  8 +++
 include/sysemu/block-backend-global-state.h | 10 +++
 block.c                                     | 34 +++++++++
 block/block-backend.c                       | 79 +++++++++++++++++++++
 block/block-ram-registrar.c                 | 40 +++++++++--
 block/trace-events                          |  2 +
 6 files changed, 168 insertions(+), 5 deletions(-)

-- 
2.39.0