Bug 2154817 - Set no_read_workqueue and no_write_workqueue options for dm-crypt on SSD
Summary: Set no_read_workqueue and no_write_workqueue options for dm-crypt on SSD
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: python-blivet
Version: 40
Hardware: All
OS: Linux
unspecified
medium
Target Milestone: ---
Assignee: Blivet Maintenance Team
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-12-19 10:58 UTC by Timothée Ravier
Modified: 2024-02-15 22:55 UTC (History)
12 users (show)

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Description Timothée Ravier 2022-12-19 10:58:15 UTC
Description of problem:

dm-crypt devices located on SSD storage should have the `no_read_workqueue` and `no_write_workqueue` set by default when the devices are created the first time in the installer.

See the following discussions:
- https://wiki.archlinux.org/title/Dm-crypt/Specialties#Disable_workqueue_for_increased_solid_state_drive_(SSD)_performance
- https://github.com/fedora-silverblue/issue-tracker/issues/388
- https://blog.cloudflare.com/speeding-up-linux-disk-encryption/
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/md/dm-crypt.c?id=39d42fa96ba1b7d2544db3f8ed5da8fb0d5cb877

Version-Release number of selected component (if applicable):

Latest Fedora

How reproducible:

Always

Steps to Reproduce:
1. Install Fedora 37/Rawhide with an encrypted disk
2. `cryptsetup luksDump /dev/sdaX | grep Flags` returns `Flags: <empty>`

Actual results:

Low disk read/write performance with `Flags: <empty>`

Expected results:

Fast disk read/write performance with `Flags:          no-read-workqueue no-write-workqueue`

Comment 1 Vendula Poncova 2023-01-10 14:29:48 UTC
It looks like something that should be handled in out storage library. Reassigning to blivet.

Comment 2 Ben Cotton 2023-02-07 15:01:13 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 38 development cycle.
Changing version to 38.

Comment 3 Aoife Moloney 2024-02-15 22:55:49 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 40 development cycle.
Changing version to 40.


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