linux-kernel - [PATCH 0/2] block/blk-throttle: Fix throttle slice time for SSDs

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Message-ID: <20250730164832.1468375-1-linux@roeck-us.net>
Date: Wed, 30 Jul 2025 09:48:30 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Tejun Heo <tj@...nel.org>
Cc: Josef Bacik <josef@...icpanda.com>,
	Jens Axboe <axboe@...nel.dk>,
	Yu Kuai <yukuai3@...wei.com>,
	cgroups@...r.kernel.org,
	linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 0/2] block/blk-throttle: Fix throttle slice time for SSDs

Since bf20ab538c81 ("blk-throttle: remove CONFIG_BLK_DEV_THROTTLING_LOW"),
the throttle slice time differs between SSD and non-SSD devices. This
causes test failures with slow throttle speeds on SSD devices.

The first patch in the series fixes the problem by restoring the throttle
slice time to a fixed value, matching behavior seen prior to above
mentioned revert. The second patch is optional and replaces the
throtl_slice variable with a constant.

----------------------------------------------------------------
Guenter Roeck (2):
      block/blk-throttle: Fix throttle slice time for SSDs
      block/blk-throttle: Remove throtl_slice from struct throtl_data

 block/blk-throttle.c | 45 ++++++++++++++-------------------------------
 1 file changed, 14 insertions(+), 31 deletions(-)