linux-kernel - Re: [PATCH 0/4] scsi: hisi_sas: Switch to use tasklet over threaded irq handling

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Message-ID: <2f2e5534-a368-547d-dedf-78f8ca2fc999@h-partners.com>
Date: Mon, 25 Aug 2025 09:42:32 +0800
From: Yihang Li <liyihang9@...artners.com>
To: Bart Van Assche <bvanassche@....org>, <martin.petersen@...cle.com>,
	<James.Bottomley@...senPartnership.com>
CC: <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linuxarm@...wei.com>, <liyihang9@...artners.com>, <liuyonglong@...wei.com>,
	<prime.zeng@...ilicon.com>
Subject: Re: [PATCH 0/4] scsi: hisi_sas: Switch to use tasklet over threaded
 irq handling

Hi Bart,

On 2025/8/22 23:17, Bart Van Assche wrote:
> 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.
> 

Thanks you for your reply. I will consider some other solution.
Additionally, do you have any good suggestions?

> Bart.
> .
>