Re: [PATCH 0/4] scsi: hisi_sas: Switch to use tasklet over threaded irq handling
From: Bart Van Assche
Date: Fri Aug 22 2025 - 11:27:36 EST
On 8/22/25 12:59 AM, Yihang Li wrote:
We found that when the CPU handling the interrupt thread is occupied by
other high-priority processes, the interrupt thread will not be scheduled.
So there is a change to switch the driver to use tasklet over threaded
interrupt handling.
Tasklets have severe disadvantages and hence their removal has been
proposed several times. See e.g. https://lwn.net/Articles/960041/.
There must be a better solution than switching to tasklets.
Bart.