Control: retitle -1 Please enable CONFIG_IOSCHED_BFQ=y On Thu, 26 Dec 2019 23:17:13 +0900 Ryutaroh Matsumoto <ryutaroh.matsum...@nagoya-u.jp> wrote: > Source: linux > Followup-For: Bug #946791 > Control: tags -1 + patch > > Dear Maintainer, > > I reported that IOWeight config item in systemd has no effect > on recent Debian kernels. I found the root cause. > io.weight was changed to io.bfq.weight, and recent systemd sets > values of IOWeight to io.bfq.weight as > > https://github.com/systemd/systemd/commit/2dbc45aea747f25cc1c3848fded2ec0062f96bcf > > For io.bfq.weight to appear in cgroup v2 filesystem, the bfq kernel > module must be loaded. Addition of "bfq" to /etc/initramfs- tools/modules > solved this issue. Since the systemd needs bfq module to be loaded, > changing CONFIG_IOSCHED_BFQ=m to CONFIG_IOSCHED_BFQ=y in kernel config > seems suitable. > > If the Debian kernel team considers this issue to be handled by another > package, e.g. initramfs-tools or systemd, please reassign this. > If this issue is considered not being a bug, please close this. >
Fwiw, the fedora kernel in F33 uses # grep CONFIG_IOSCHED_BFQ /boot/config-5.10.22-200.fc33.x86_64 CONFIG_IOSCHED_BFQ=y I think using CONFIG_IOSCHED_BFQ=y instead of loading it via initramfs- tools makes more sense (assuming it is safe to enable). Regards, Michael
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