linux-kernel - Re: [PATCH] drbd: always set BLK_FEAT_STABLE

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Message-Id: <177083138009.157276.14024749739595076725.b4-ty@kernel.dk>
Date: Wed, 11 Feb 2026 10:36:20 -0700
From: Jens Axboe <axboe@...nel.dk>
To: Christoph Böhmwalder <christoph.boehmwalder@...bit.com>
Cc: drbd-dev@...ts.linbit.com, linux-kernel@...r.kernel.org, 
 Lars Ellenberg <lars.ellenberg@...bit.com>, 
 Philipp Reisner <philipp.reisner@...bit.com>, linux-block@...r.kernel.org
Subject: Re: [PATCH] drbd: always set BLK_FEAT_STABLE_WRITES


On Thu, 05 Feb 2026 18:39:29 +0100, Christoph Böhmwalder wrote:
> DRBD requires stable pages because it may read the same bio data
> multiple times for local disk I/O and network transmission, and in
> some cases for calculating checksums.
> 
> The BLK_FEAT_STABLE_WRITES flag is set when the device is first
> created, but blk_set_stacking_limits() clears it whenever a
> backing device is attached. In some cases the flag may be
> inherited from the backing device, but we want it to be enabled
> at all times.
> 
> [...]

Applied, thanks!

[1/1] drbd: always set BLK_FEAT_STABLE_WRITES
      commit: 2ebc8d600fb907fa6b1e7095c0b6d84fc47e91ea

Best regards,
-- 
Jens Axboe