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

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Message-ID: <c0510108-30ed-4301-ad2f-00bcbba7bf1a@acm.org>
Date: Tue, 26 Aug 2025 06:45:14 -0700
From: Bart Van Assche <bvanassche@....org>
To: Jason Yan <yanaijie@...wei.com>, Yihang Li <liyihang9@...artners.com>,
 martin.petersen@...cle.com, James.Bottomley@...senPartnership.com
Cc: linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
 linuxarm@...wei.com, liuyonglong@...wei.com, prime.zeng@...ilicon.com
Subject: Re: [PATCH 0/4] scsi: hisi_sas: Switch to use tasklet over threaded
 irq handling


On 8/26/25 1:47 AM, Jason Yan wrote:
> It seems the official replacement of tasklets is WQ_BH. However there 
> are very few users now. I'm not sure if the stability and performance 
> can meet our requirements.

I'm not aware of any stability issues related to WQ_BH.

The alternative that I proposed should result in better performance and 
lower latency than tasklets and shouldn't have the disadvantages of an
approach based on tasklets.

Bart.