Re: [PATCH] scsi: core: move scsi_host_busy() out of host lock for waking up EH handler

Martin K. Petersen
2024-01-24T03:01:00Z

On Fri, 12 Jan 2024 15:00:00 +0800, Ming Lei wrote:

> Inside scsi_eh_wakeup(), scsi_host_busy() is called & checked with host lock
> every time for deciding if error handler kthread needs to be waken up.
>
> This way can be too heavy in case of recovery, such as:
>
> - N hardware queues
> - queue depth is M for each hardware queue
> - each scsi_host_busy() iterates over (N * M) tag/requests
>
> [...]

Applied to 6.8/scsi-fixes, thanks!

[1/1] scsi: core: move scsi_host_busy() out of host lock for waking up EH handler
https://git.kernel.org/mkp/scsi/c/4373534a9850

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Martin K. Petersen Oracle Linux Engineering