linux-kernel - RE: [PATCH 2/2] ufs: don't use the fair tag sharings

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Message-ID: <BL0PR04MB6564242D93EE6826CF1F6747FC779@BL0PR04MB6564.namprd04.prod.outlook.com>
Date:   Wed, 10 May 2023 05:21:35 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Bart Van Assche <bvanassche@....org>,
        Ed Tsai <ed.tsai@...iatek.com>,
        "axboe@...nel.dk" <axboe@...nel.dk>
CC:     "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "peter.wang@...iatek.com" <peter.wang@...iatek.com>,
        "chun-hung.wu@...iatek.com" <chun-hung.wu@...iatek.com>,
        "alice.chao@...iatek.com" <alice.chao@...iatek.com>,
        "powen.kao@...iatek.com" <powen.kao@...iatek.com>,
        "naomi.chu@...iatek.com" <naomi.chu@...iatek.com>,
        "wsd_upstream@...iatek.com" <wsd_upstream@...iatek.com>
Subject: RE: [PATCH 2/2] ufs: don't use the fair tag sharings

> 
> On 5/9/23 09:19, Avri Altman wrote:
> > Following your argument, then why fair allocation exists in the first place?
> 
> Does this patch answer your question?
> 
> [PATCH v2] block: Improve shared tag set performance
> https://lore.kernel.org/linux-block/20230103195337.158625-1-
> bvanassche@....org/
OK.

Why it was needed to invent a new flag instead of  just clear BLK_MQ_F_TAG_QUEUE_SHARED?

Thanks,
Avri

> 
> Thanks,
> 
> Bart.