Subsystem responsible for /proc/diskstats timings?

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Hello,

Which subsystem could be responsible for

https://bugzilla.kernel.org/show_bug.cgi?id=200857

("4.18 regression: /proc/diskstats: I/O busy time not updated correctly")?

This is for AHCI SATA disks (/dev/sda, /dev/sdb, ...),
and the busy time reported by /proc/diskstats for SSD's is still (4.18.6)
to low by at least a factor of 20 (!).

Many thanks in advance for your help!

--
Prof. Dr. Klaus Kusche
Private address: Rosenberg 41, 07546 Gera, Germany
+49 365 20413058 klaus.kusche@xxxxxxxxxxxxxxx https://www.computerix.info
Office address: DHGE Gera, Weg der Freundschaft 4, 07546 Gera, Germany
+49 365 4341 306 klaus.kusche@xxxxxxx https://www.dhge.de



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