re: A curious case of slow Docker image builds VIEW POST

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re: Hi Jarek, On CE 18 I have applied your configuration and even though the module parameter is set as off, docker still reports native overlay diff ...
 

I've had the issue where redirect_dir=off didn't solve the issue as well. Turns out more recent kernels (>= 4.20) enable redirect_dir when metacopy is on. You need to set metacopy=off redirect_dir=off as module parameters.

github.com/torvalds/linux/commit/d...
spinics.net/lists/linux-unionfs/ms...

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