[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, 1 month ago

Diff against v2
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block/block-backend.c | 41 ++++++++++++++++++++++++++++++-----------
1 file changed, 30 insertions(+), 11 deletions(-)

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

Posted by Stefan Hajnoczi 1 year, 1 month 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(-)

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2.39.2