1d03accf12
* Set optimal blk-mq schedulers (bfq and mq-deadline for HDD and
SSD respectively)
* Explicitly set CFQ for rotational disks when no `elevator`
is specified
* Verbose comments explaining what is going on
* Rename the rules file since it is not ssd-only anymore
OBS-URL: https://build.opensuse.org/package/show/Base:System/systemd?expand=0&rev=1026
25 lines
793 B
Plaintext
25 lines
793 B
Plaintext
# Set optimal IO schedulers for HDD and SSD
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ACTION!="add", GOTO="scheduler_end"
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SUBSYSTEM!="block", GOTO="scheduler_end"
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# Do not change scheduler if `elevator` cmdline parameter is set
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IMPORT{cmdline}="elevator"
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ENV{elevator}=="*?", GOTO="scheduler_end"
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# Determine if BLK-MQ is enabled
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TEST=="%S%p/mq", ENV{.IS_MQ}="1"
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# MQ: BFQ scheduler for HDD
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ENV{.IS_MQ}=="1", ATTR{queue/rotational}!="0", ATTR{queue/scheduler}="bfq"
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# MQ: deadline scheduler for SSD
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ENV{.IS_MQ}=="1", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="mq-deadline"
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# Non-MQ: CFQ scheduler for HDD
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ENV{.IS_MQ}!="1", ATTR{queue/rotational}!="0", ATTR{queue/scheduler}="cfq"
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# Non-MQ: deadline scheduler for SSD
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ENV{.IS_MQ}!="1", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="deadline"
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LABEL="scheduler_end"
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