linux-kernel - Re: [PATCH v2] scsi: ufs: Allow RTT negotiation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <e00686432d2aa09880f801eecadbb2bdf6d23573.camel@gmail.com>
Date: Wed, 08 May 2024 18:32:40 +0200
From: Bean Huo <huobean@...il.com>
To: Avri Altman <avri.altman@....com>, "Martin K . Petersen"
	 <martin.petersen@...cle.com>
Cc: Bart Van Assche <bvanassche@....org>, Bean Huo <beanhuo@...ron.com>, 
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] scsi: ufs: Allow RTT negotiation

On Fri, 2024-05-03 at 14:34 +0300, Avri Altman wrote:
> UFS4.0, and specifically gear 5 changes this, and requires the device
> to
> be more attentive.  This doesn't come free - the device has to
> allocate
> more resources to that end, but the sequential write performance
> improvement is significant. Early measurements shows 25% gain when
> moving from rtt 2 to 9. Therefore, set bMaxNumOfRTT to be
> min(bDeviceRTTCap, NORTT) as UFSHCI expects.
> 
> Signed-off-by: Avri Altman <avri.altman@....com>


Avri,

I was still curious about this 25% gain, so I will take a look. It
would be great if you could share more information about this.



Reviewed-by: Bean Huo <beanhuo@...ron.com>