On 10/9/25 2:57 AM, Martin Wilck wrote:
In general, I'm wondering whether we need a more generic solution to
this problem. Therefore I've added linux-block to cc.
The way I see it, if a device has queued IO without any means to
perform the IO, it can't be frozen. We'd either need to fail all queued
IO in this case, or refuse attempts to freeze the queue.
If a device has queued I/O and the I/O can't make progress then it isn't
necessary to call blk_mq_freeze_queue(), isn't it? See also "[PATCH 0/3]
Fix a deadlock related to modifying queue attributes"
(https://lore.kernel.org/linux-block/[email protected]/).
BTW, that patch series is not upstream. I apply it manually every time
before I run blktests.
Bart.
