[v1] block: protect BlockBackend->queued_requests with a lock

[PATCH 0/3] block: protect BlockBackend->queued_requests with a lock

Stefan Hajnoczi posted 3 patches 1 year, 2 months ago

Diff against v2
Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20230227205704.1910562-1-stefanha@redhat.com

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

There is a newer version of this series

block/block-backend.c | 41 ++++++++++++++++++++++++++++++-----------
1 file changed, 30 insertions(+), 11 deletions(-)

Expand all Fold all

[PATCH 0/3] block: protect BlockBackend->queued_requests with a lock

Posted by Stefan Hajnoczi 1 year, 2 months ago

QEMU block layer multi-queue support involves running I/O requests from
multiple threads. Shared state must be protected somehow to avoid thread-safety
issues.

The BlockBackend->queued_requests CoQueue is accessed without a lock and will
likely be corrupted when multiple threads queue requests at the same time.

This patch series make BlockBackend->queued_requests thread-safe.

Stefan Hajnoczi (3):
  block: make BlockBackend->quiesce_counter atomic
  block: make BlockBackend->disable_request_queuing atomic
  block: protect BlockBackend->queued_requests with a lock

 block/block-backend.c | 41 ++++++++++++++++++++++++++++++-----------
 1 file changed, 30 insertions(+), 11 deletions(-)

-- 
2.39.2