Hi,
在 2022/11/24 6:01, Pavel Machek 写道:
Hi!
I see this... and it looks like there are 16 workqueues before nbd is
even used. Surely there are better ways to do that?
Yes, it would be nice to create a pool of workers that only spawns up
threads when actual parallel requests are made. Are you willing to
help write the patch?
I was thinking more "only spawn a workqueue when nbd is opened" or so.
I have 16 of them, and I'm not using nbd. Workqueue per open device is
okay, current situation... not so much.
You can take a look at this commit:
e2daec488c57 ("nbd: Fix hungtask when nbd_config_put")
Allocation of recv_workq is moved from start device to alloc device to
fix hungtask. You might need to be careful if you want to move this.
Thanks,
Kuai
Pavel
