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api: deprecate KernelMemoryTCP support

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Starting with kernel v6.12, kernel memory TCP accounting is deprecated for cgroups v1.
Note: kernel memory TCP accounting is not supported by cgroups v2.

See d046ff46ee

Signed-off-by: Austin Vazquez <austin.vazquez@docker.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Austin Vazquez
2025-09-29 13:34:31 -05:00
committed by Sebastiaan van Stijn
parent 9a97f59e6e
commit fb2f8115c8
12 changed files with 77 additions and 31 deletions
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4
daemon/info_unix.go
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@@ -34,7 +34,7 @@ func (daemon *Daemon) fillPlatformInfo(ctx context.Context, v *system.Info, sysI
if v.CgroupDriver != cgroupNoneDriver {
v.MemoryLimit = sysInfo.MemoryLimit
v.SwapLimit = sysInfo.SwapLimit
v.KernelMemoryTCP = sysInfo.KernelMemoryTCP
v.KernelMemoryTCP = sysInfo.KernelMemoryTCP //nolint:staticcheck // ignore SA1019: memory.KernelTCP is deprecated: kernel memory tcp accounting is not supported in cgroups v2, and has been deprecated in [kernel v6.12]. This field should no longer be used, as it may be ignored by runtimes.
v.OomKillDisable = sysInfo.OomKillDisable
v.CPUCfsPeriod = sysInfo.CPUCfs
v.CPUCfsQuota = sysInfo.CPUCfs
@@ -93,7 +93,7 @@ func (daemon *Daemon) fillPlatformInfo(ctx context.Context, v *system.Info, sysI
if !v.SwapLimit {
v.Warnings = append(v.Warnings, "WARNING: No swap limit support")
}
if !v.KernelMemoryTCP && v.CgroupVersion == "1" {
if !v.KernelMemoryTCP && v.CgroupVersion == "1" { //nolint:staticcheck // ignore SA1019: memory.KernelTCP is deprecated: kernel memory tcp accounting is not supported in cgroups v2, and has been deprecated in [kernel v6.12]. This field should no longer be used, as it may be ignored by runtimes.
// kernel memory is not available for cgroup v2.
// Warning is not printed on cgroup v2, because there is no action user can take.
v.Warnings = append(v.Warnings, "WARNING: No kernel memory TCP limit support")