Support for flags added in cryptsetup 2.3.4 that improver luks performance on nvme drives. Reproducible: Always
Bypass dm-crypt internal workqueue and process read or write requests synchronously. This option is only relevant for open action. NOTE: These options are available only for low-level dm-crypt performance tuning, use only if you need a change to default dm-crypt behaviour. Needs kernel 5.9 or later. Similar to the allow discards implementation.
I'll not implement those options. Instead we will provide new generic options for additional options to pass to cryptsetup.
And the recommended way is to use LUKS2 and make these flags permanent.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/proj/genkernel.git/commit/?id=a0a6d6313874a7567a26c405713aaf610695285d commit a0a6d6313874a7567a26c405713aaf610695285d Author: Thomas Deutschmann <whissi@gentoo.org> AuthorDate: 2021-02-07 18:02:29 +0000 Commit: Thomas Deutschmann <whissi@gentoo.org> CommitDate: 2021-02-07 18:02:29 +0000 linuxrc: add kernel command-line argument to allow user to pass additional options to cryptsetup Cryptsetup supports additional options like "--perf-no_read_workqueue" or "--perf-no_write_workqueue". While it is recommended to use LUKS2 format and make these activiation flags permanent, you can also make use of the new kernel command-line arguments "crypt_root_options" for root device or "crypt_swap_options" for swap device to pass additional options to cryptsetup. These arguments can be specified multiple times or separate multiple options with a comma. Bug: https://bugs.gentoo.org/755587 Signed-off-by: Thomas Deutschmann <whissi@gentoo.org> defaults/initrd.defaults | 2 ++ defaults/initrd.scripts | 16 +++++++--------- defaults/linuxrc | 13 ++++++++++++- defaults/unlock-luks.sh | 8 +++----- doc/genkernel.8.txt | 10 ++++++++++ 5 files changed, 34 insertions(+), 15 deletions(-)
Released with genkernel-4.2.0!
