linux-kernel - Re: [PATCH] Revert "block: don't reorder requests in blk_add_rq_to

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Message-ID: <79d40bb9-ec40-415d-80eb-4ae8ab150737@acm.org>
Date: Wed, 11 Jun 2025 08:24:45 -0700
From: Bart Van Assche <bvanassche@....org>
To: Hazem Mohamed Abuelfotoh <abuehaze@...zon.com>
Cc: stable@...r.kernel.org, kernel test robot <oliver.sang@...el.com>,
 Hagar Hemdan <hagarhem@...zon.com>, Shaoying Xu <shaoyi@...zon.com>,
 Jens Axboe <axboe@...nel.dk>, "Michael S. Tsirkin" <mst@...hat.com>,
 Jason Wang <jasowang@...hat.com>, Paolo Bonzini <pbonzini@...hat.com>,
 Stefan Hajnoczi <stefanha@...hat.com>, Eugenio Pérez
 <eperezma@...hat.com>, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
 Keith Busch <kbusch@...nel.org>, Christoph Hellwig <hch@....de>,
 Sagi Grimberg <sagi@...mberg.me>, linux-block@...r.kernel.org,
 linux-kernel@...r.kernel.org, virtualization@...ts.linux.dev,
 linux-nvme@...ts.infradead.org
Subject: Re: [PATCH] Revert "block: don't reorder requests in
 blk_add_rq_to_plug"

On 6/11/25 5:14 AM, Hazem Mohamed Abuelfotoh wrote:
> Given that moving plug list to a single linked list was mainly for
> performance reason then let's revert commit <e70c301faece> ("block: don't
> reorder requests in blk_add_rq_to_plug") for now to mitigate the
> reported performance regression.

Reverting that commit would break zoned storage support and hence is not
an option.

Bart.