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[PATCH 0/7] block/nvme: support nested aio_poll()
From: |
Stefan Hajnoczi |
Subject: |
[PATCH 0/7] block/nvme: support nested aio_poll() |
Date: |
Tue, 19 May 2020 18:11:31 +0100 |
This series allows aio_poll() to work from I/O request completion callbacks.
QEMU block drivers are supposed to support this because some code paths rely on
this behavior.
There was no measurable performance difference with nested aio_poll() support.
This patch series also contains cleanups that I made while examining and
benchmarking the code.
Stefan Hajnoczi (7):
block/nvme: poll queues without q->lock
block/nvme: drop tautologous assertion
block/nvme: don't access CQE after moving cq.head
block/nvme: switch to a NVMeRequest freelist
block/nvme: clarify that free_req_queue is protected by q->lock
block/nvme: keep BDRVNVMeState pointer in NVMeQueuePair
block/nvme: support nested aio_poll()
block/nvme.c | 220 ++++++++++++++++++++++++++++++++-------------
block/trace-events | 2 +-
2 files changed, 160 insertions(+), 62 deletions(-)
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2.25.3