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docs cgroups: add another example size for hugetlb
Add another example to clarify that HugePages smaller than 1MB will be displayed using "KB", with an uppercased K (eg. 20KB), and not the normal SI prefix kilo (small k). Because of a misunderstanding/copy-paste error inside runc (see https://github.com/opencontainers/runc/pull/2065), it tried accessing the cgroup control file of a 64kB HugePage using "hugetlb.64kB._____" instead of the correct "hugetlb.64KB._____". Adding a new example will make it clear how sizes smaller than 1MB are handled. Signed-off-by: Odin Ugedal <odin@ugedal.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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@ -32,14 +32,18 @@ Brief summary of control files
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hugetlb.<hugepagesize>.usage_in_bytes # show current usage for "hugepagesize" hugetlb
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hugetlb.<hugepagesize>.usage_in_bytes # show current usage for "hugepagesize" hugetlb
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hugetlb.<hugepagesize>.failcnt # show the number of allocation failure due to HugeTLB limit
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hugetlb.<hugepagesize>.failcnt # show the number of allocation failure due to HugeTLB limit
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For a system supporting two hugepage size (16M and 16G) the control
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For a system supporting three hugepage sizes (64k, 32M and 1G), the control
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files include:
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files include:
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hugetlb.16GB.limit_in_bytes
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hugetlb.1GB.limit_in_bytes
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hugetlb.16GB.max_usage_in_bytes
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hugetlb.1GB.max_usage_in_bytes
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hugetlb.16GB.usage_in_bytes
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hugetlb.1GB.usage_in_bytes
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hugetlb.16GB.failcnt
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hugetlb.1GB.failcnt
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hugetlb.16MB.limit_in_bytes
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hugetlb.64KB.limit_in_bytes
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hugetlb.16MB.max_usage_in_bytes
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hugetlb.64KB.max_usage_in_bytes
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hugetlb.16MB.usage_in_bytes
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hugetlb.64KB.usage_in_bytes
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hugetlb.16MB.failcnt
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hugetlb.64KB.failcnt
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hugetlb.32MB.limit_in_bytes
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hugetlb.32MB.max_usage_in_bytes
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hugetlb.32MB.usage_in_bytes
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hugetlb.32MB.failcnt
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