[Devel] [PATCH hci-8.1 v6 4/6] dm-qcow2: complete wbd before ending the data qio

[no-reply at sashiko.virtuozzo.com]

> data_rw_complete() calls qio_endio() before complete_wbd(). qio_endio()
> drops the inflight ref, so qcow2_flush_deferred_activity() may return
> on suspend while complete_wbd() for a failed L1/L2 writeback is still
> running in AIO completion context. revert_l_entries_update() then
> marks clusters unused and dirties R2 after the flush, and the change
> is never written back.
> 
> Complete the wbd first. The md writeback path already does it in this
> order.
> 
> https://virtuozzo.atlassian.net/browse/VSTOR-148171
> Feature: dm-qcow2: block device over QCOW2 files driver
> Signed-off-by: Alexander Ivanov <alexander.ivanov at virtuozzo.com>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261022121706.1890593-1-alexander.ivanov@virtuozzo.com?part=4