Re: [PATCH v2 6/6] scsi: bsg: release io_uring requests in end-I/O

[Bart Van Assche]

On 10/26/26 1:29 AM, Yingjie Wang wrote:
> +	pdu->response_addr = READ_ONCE(cmd->response);
> +	pdu->max_response_len = min(READ_ONCE(cmd->max_response_len),
> +				    SCSI_SENSE_BUFFERSIZE);
> +	pdu->sense_buffer = NULL;
> +	if (pdu->response_addr && pdu->max_response_len) {
> +		pdu->sense_buffer = kmalloc(pdu->max_response_len,
> +					    gfp_mask | __GFP_ACCOUNT);
> +		if (!pdu->sense_buffer)
> +			return (issue_flags & IO_URING_F_NONBLOCK) ? -EAGAIN : -ENOMEM;
> +	}

No new kmalloc() calls in the I/O path please. These have a measurable
performance impact.

Thanks,

Bart.