Eric Lee / smarc-fsl-linux-kernel

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Commit 45531757b45cae0ce64c5aff08c2534d5a0fa3e7

Authored by Daniel Lezcano
Committed by Linus Torvalds
1 parent f4a2589fea
Exists in master and in 39 other branches 8mp-imx_5.4.70_2.3.0, 8qm-imx_5.4.70_2.3.0, emb_imx_lf-5.15.y, emb_lf-6.1.y, imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, imx_4.1.15_1.0.0_ga, pitx_8mp_lf-5.10.y, rt-smarc-imx_4.1.15_1.0.0_ga, rt_linux_5.15.71, smarc-8m-android-11.0.0_2.0.0, smarc-imx6_4.14.98_2.0.0_ga, smarc-imx6_4.9.88_2.0.0_ga, smarc-imx7_4.14.98_2.0.0_ga, smarc-imx7_4.9.11_1.0.0_ga, smarc-imx7_4.9.88_2.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-imx_4.1.15_1.0.0_ga, smarc-imx_4.9.11_1.0.0_ga, smarc-imx_4.9.51_imx8m_ga, smarc-imx_4.9.88_2.0.0_ga, smarc-m6.0.1_2.1.0-ga, smarc-n7.1.2_2.0.0-ga, smarc-rel_imx_4.1.15_1.2.0_ga, smarc_8m_00d0_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.14.78_1.0.0_ga, smarc_8m_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.19.35_1.1.0, smarc_8mm_imx_4.14.78_1.0.0_ga, smarc_8mm_imx_4.14.98_2.0.0_ga, smarc_8mm_imx_4.19.35_1.1.0, smarc_8mm_imx_5.4.24_2.1.0, smarc_8mp_lf-5.10.y, smarc_8mq_imx_5.4.24_2.1.0, smarc_8mq_lf-5.10.y, smarc_imx_lf-5.15.y

cgroup: notify ns_cgroup deprecated 

The ns_cgroup will be removed very soon.  Let's warn, for this version,
ns_cgroup is deprecated.

Make ns_cgroup and clone_children exclusive.  If the clone_children is set
and the ns_cgroup is mounted, let's fail with EINVAL when the ns_cgroup
subsys is created (a printk will help the user to understand why the
creation fails).

Update the feature remove schedule file with the deprecated ns_cgroup.

Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Showing 2 changed files with 25 additions and 0 deletions Side-by-side Diff

Documentation/feature-removal-schedule.txt
Diff comments   View file @ 4553175
... ... @@ -526,6 +526,23 @@
526 526  
527 527 ----------------------------
528 528  
  529 +What: namespace cgroup (ns_cgroup)
  530 +When: 2.6.38
  531 +Why: The ns_cgroup leads to some problems:
  532 + * cgroup creation is out-of-control
  533 + * cgroup name can conflict when pids are looping
  534 + * it is not possible to have a single process handling
  535 + a lot of namespaces without falling in a exponential creation time
  536 + * we may want to create a namespace without creating a cgroup
  537 +
  538 + The ns_cgroup is replaced by a compatibility flag 'clone_children',
  539 + where a newly created cgroup will copy the parent cgroup values.
  540 + The userspace has to manually create a cgroup and add a task to
  541 + the 'tasks' file.
  542 +Who: Daniel Lezcano <daniel.lezcano@free.fr>
  543 +
  544 +----------------------------
  545 +
529 546 What: iwlwifi disable_hw_scan module parameters
530 547 When: 2.6.40
531 548 Why: Hareware scan is the prefer method for iwlwifi devices for
... ... @@ -85,6 +85,14 @@
85 85 return ERR_PTR(-EPERM);
86 86 if (!cgroup_is_descendant(cgroup, current))
87 87 return ERR_PTR(-EPERM);
  88 + if (test_bit(CGRP_CLONE_CHILDREN, &cgroup->flags)) {
  89 + printk("ns_cgroup can't be created with parent "
  90 + "'clone_children' set.\n");
  91 + return ERR_PTR(-EINVAL);
  92 + }
  93 +
  94 + printk_once("ns_cgroup deprecated: consider using the "
  95 + "'clone_children' flag without the ns_cgroup.\n");
88 96  
89 97 ns_cgroup = kzalloc(sizeof(*ns_cgroup), GFP_KERNEL);
90 98 if (!ns_cgroup)