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cgroups.7: Elaborate a little on problems of splitting threads across cgroups in v1 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2018-01-09 21:20:24 +01:00
parent 7b574df5c6
commit c56ec51ba6
1 changed files with 8 additions and 3 deletions
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man7/cgroups.7
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@ -146,9 +146,14 @@ In this view, a process can consist of multiple tasks
and called such in the remainder of this man page).
In cgroups v1, it is possible to independently manipulate
the cgroup memberships of the threads in a process.
Because splitting threads across different cgroups
caused problems in some cases,
.\" FIXME Add some text describing why this was a problem.
.PP
The cgroups v1 ability to split threads across different cgroups
caused problems in some cases.
For example, it made no sense for the
.I memory
controller,
since all of the threads of a process share a single address space.
Because of these problems,
the ability to independently manipulate the cgroup memberships
of the threads in a process was removed in the initial cgroups v2
implementation, and subsequently restored in a more limited form