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cgroup/cpuset: Mark memory_spread_slab as obsolete

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We've removed the SLAB allocator, cpuset_do_slab_mem_spread() and
SLAB_MEM_SPREAD, memory_spread_slab is a no-op now. We can mark
memory_spread_slab as obsolete in case someone still wants to use it after
cpuset_do_slab_mem_spread() removed. For more details, please check [1].

[1] https://lore.kernel.org/lkml/32bc1403-49da-445a-8c00-9686a3b0d6a3@redhat.com/T/#m8e292e21b00f95a4bb8086371fa7387fa4ea8f60

tj: Description and cosmetic updates.

Signed-off-by: Xiongwei Song <xiongwei.song@windriver.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Xiongwei Song 2024-02-29 22:20:07 +08:00 committed by Tejun Heo
parent 61a182ab61
commit 3ab67a9ce8
2 changed files with 2 additions and 1 deletions
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2
Documentation/admin-guide/cgroup-v1/cpusets.rst
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@ -179,7 +179,7 @@ files describing that cpuset:
- cpuset.mem_hardwall flag: is memory allocation hardwalled - cpuset.mem_hardwall flag: is memory allocation hardwalled
- cpuset.memory_pressure: measure of how much paging pressure in cpuset - cpuset.memory_pressure: measure of how much paging pressure in cpuset
- cpuset.memory_spread_page flag: if set, spread page cache evenly on allowed nodes - cpuset.memory_spread_page flag: if set, spread page cache evenly on allowed nodes
- cpuset.memory_spread_slab flag: if set, spread slab cache evenly on allowed nodes - cpuset.memory_spread_slab flag: OBSOLETE. Doesn't have any function.
- cpuset.sched_load_balance flag: if set, load balance within CPUs on that cpuset - cpuset.sched_load_balance flag: if set, load balance within CPUs on that cpuset
- cpuset.sched_relax_domain_level: the searching range when migrating tasks - cpuset.sched_relax_domain_level: the searching range when migrating tasks

1
kernel/cgroup/cpuset.c
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@ -3897,6 +3897,7 @@ static struct cftype legacy_files[] = {
}, },
{ {
/* obsolete, may be removed in the future */
.name = "memory_spread_slab", .name = "memory_spread_slab",
.read_u64 = cpuset_read_u64, .read_u64 = cpuset_read_u64,
.write_u64 = cpuset_write_u64, .write_u64 = cpuset_write_u64,