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SubjectRe: Debug scsi message in linux 4.19.31


>> Mar 23 17:40:10 hades kernel: sd 0:0:0:0: [sda] Optimal transfer size 0
>> bytes < PAGE_SIZE (4096 bytes)

We're just trying to weed out the devices that report garbage in this
field. But of course none of the devices I tested with put 0 in there.

>> Does it really belong in an LTS kernel?

The patch does fix problems for devices that report a nonsensical
value. But it is a regression that it now prints a warning for devices
that don't report an optimal I/O size at all.

Sorry about that. Will fix tomorrow!

Martin K. Petersen Oracle Linux Engineering

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