From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7FA541514DC; Tue, 19 Nov 2024 07:40:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732002049; cv=none; b=tDbdz4KSVyYY3KZx9WjMV0H7yv7qQ5lbFrzHF0AQ6/1f+03nSakMSyRBFkAytpL0Id3XXE6PE4H/i+Lz/snMy+hCo2CtzFra434/bbaWe/43exzYKeY/+SKqokK7BQgk4VRQmaxsBY0fs+LE/fie4yCxs697IIE5XR9Sw067ROs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732002049; c=relaxed/simple; bh=+fi1GzmWgsYUM24+hhHWpqLQGK3l45iFa7mfvc8LyeA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=RlO4h542nFGFlUDUM1I21exLbmsiFZoUuC2UjSkIYlUOBRkqkTxVxYm2MB/7yOatP1y9zILY5XmNeNiMWpA6Yp4PY1iw/Attr98btSBWW53muHky9ely580TnRDemqHlnLXJ638dXuwUEC63QDZWHWbjZwUNIh9MLqVB0+ABQGA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=So5M+5pj; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="So5M+5pj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3A9E1C4CED1; Tue, 19 Nov 2024 07:40:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1732002049; bh=+fi1GzmWgsYUM24+hhHWpqLQGK3l45iFa7mfvc8LyeA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=So5M+5pjxhrrat+GAI7wFdozURVcOSxieGhGjBsf/NBmJiKXZuiBoA79bQI5AeoCk 7rfTq/SLNXOHP8tN2TzKhhUQrW9TyQGGo18ZYew4gxPLXSBFU2dLnZEbhkdWXrXINQ mJQDJeg0/ovsDHlxMl4rgmrfaes77OVfhSEy92A1WHMbKDuL3R0EzLBMBesA0L+lZY 857G03fawO4Iu4VLmRicXDrr3fi0sL1ctmvxvFK+Kz2GSN60n36rpdOxdE0SsvNI0G pvfeWHhkhLLmH1hf2+Em5ucacHSNd4CP+jf+KLGOvZZrut/szD5zKywiOiqcZls8ov hp6evq9svgbNA== Message-ID: <8bf2087a-a903-4339-a7af-3f3f23e3d4d5@kernel.org> Date: Tue, 19 Nov 2024 16:40:47 +0900 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v16 11/26] block: Optimize blk_mq_submit_bio() for the cache hit scenario To: Bart Van Assche , Jens Axboe Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, Christoph Hellwig , Jaegeuk Kim References: <20241119002815.600608-1-bvanassche@acm.org> <20241119002815.600608-12-bvanassche@acm.org> From: Damien Le Moal Content-Language: en-US Organization: Western Digital Research In-Reply-To: <20241119002815.600608-12-bvanassche@acm.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/19/24 09:28, Bart Van Assche wrote: > Help the CPU branch predictor in case of a cache hit by handling the cache > hit scenario first. > > Signed-off-by: Bart Van Assche Not sure this really helps but looks OK to me. Reviewed-by: Damien Le Moal -- Damien Le Moal Western Digital Research