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client: do not disable memory swappiness if kernel does not support it #17625
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This PR adds a workaround for very old Linux kernels which do not support the memory swappiness interface file. Normally we write a "0" to the file to explicitly disable swap. In the case the kernel does not support it, give libcontainer a nil value so it does not write anything. Fixes #17448
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Jun 21, 2023
Spot check we on 20.04 (cgroups v1) that we didn't break anything
checking our agent detects cgroups v1
swappiness is still set on cgroups v1 on newer kernels
running exec tests
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jrasell
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LGTM.
Co-authored-by: James Rasell <jrasell@users.noreply.github.com>
This was referenced Jun 22, 2023
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backport/1.3.x
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backport/1.4.x
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backport/1.5.x
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This PR adds a workaround for very old Linux kernels which do not support
the memory swappiness interface file. Normally we write a "0" to the file
to explicitly disable swap. In the case the kernel does not support it,
give libcontainer a nil value so it does not write anything.
Fixes #17448