#computers #linux

Created: 2023-12-08 13:30

The Linux dm-flakey target is the same as the linear target except that it exhibits unreliable behaviour periodically. It’s been found useful in simulating failing devices for testing purposes.

To use it do the following:

sudo dmsetup create <name> --table "<begin-sector> <size> flakey <source-device> <offset> <period-normal> <period-faulty>"

This would create a block device under /dev/mapper/<name> which forwards IO to <source-device> for <period-normal> after which it returns IO errors for <period-fault>.

Created: 2022-11-18 12:15

#cpp

Lei argues that the [[CMake]]’ interpretation of the keywords PUBLIC, PRIVATE and INTERFACE is much like the [[C++]] inheritance.

Suppose we have library A, B and C. To build library B we publicly link library A. If library C links against library B it automatically also links against library A. If instead we link B with A privately, when we link C against B, C is not automatically linked to A.