On 2017-01-15 16:14 +0100, Pascal Dormeau wrote: > Systemd does not mount tmpfs file systems with the correct size when > the size is expressed in % of physical RAM in /etc/fstab. > > I guess it does not read at all the % character, and the size is read in > bytes. size=5% or size=10% results into file systems with a 4 k > size (man mount says "The size is given in bytes, and rounded up to > entire pages").
This is confirmed by "systemctl show tmpfs.mount". Where=/tmp What=tmpfs Options=rw,nosuid,nodev,relatime,size=4k Type=tmpfs TimeoutUSec=1min 30s ControlPID=0 DirectoryMode=0755 SloppyOptions=no LazyUnmount=no ForceUnmount=no Result=success UID=4294967295 GID=4294967295 Slice=system.slice ControlGroup=/system.slice/tmp.mount MemoryCurrent=18446744073709551615 CPUUsageNSec=18446744073709551615 TasksCurrent=0 Delegate=no CPUAccounting=no CPUWeight=18446744073709551615 StartupCPUWeight=18446744073709551615 CPUShares=18446744073709551615 StartupCPUShares=18446744073709551615 CPUQuotaPerSecUSec=infinity IOAccounting=no IOWeight=18446744073709551615 StartupIOWeight=18446744073709551615 BlockIOAccounting=no BlockIOWeight=18446744073709551615 StartupBlockIOWeight=18446744073709551615 MemoryAccounting=no MemoryLow=0 MemoryHigh=18446744073709551615 MemoryMax=18446744073709551615 MemorySwapMax=18446744073709551615 MemoryLimit=18446744073709551615 DevicePolicy=auto TasksAccounting=yes TasksMax=4915 UMask=0022 LimitCPU=18446744073709551615 LimitCPUSoft=18446744073709551615 LimitFSIZE=18446744073709551615 LimitFSIZESoft=18446744073709551615 LimitDATA=18446744073709551615 LimitDATASoft=18446744073709551615 LimitSTACK=18446744073709551615 LimitSTACKSoft=8388608 LimitCORE=18446744073709551615 LimitCORESoft=0 LimitRSS=18446744073709551615 LimitRSSSoft=18446744073709551615 LimitNOFILE=4096 LimitNOFILESoft=1024 LimitAS=18446744073709551615 LimitASSoft=18446744073709551615 LimitNPROC=13329 LimitNPROCSoft=13329 LimitMEMLOCK=65536 LimitMEMLOCKSoft=65536 LimitLOCKS=18446744073709551615 LimitLOCKSSoft=18446744073709551615 LimitSIGPENDING=13329 LimitSIGPENDINGSoft=13329 LimitMSGQUEUE=819200 LimitMSGQUEUESoft=819200 LimitNICE=0 LimitNICESoft=0 LimitRTPRIO=0 LimitRTPRIOSoft=0 LimitRTTIME=18446744073709551615 LimitRTTIMESoft=18446744073709551615 OOMScoreAdjust=0 Nice=0 IOScheduling=0 CPUSchedulingPolicy=0 CPUSchedulingPriority=0 TimerSlackNSec=50000 CPUSchedulingResetOnFork=no NonBlocking=no StandardInput=null StandardOutput=inherit StandardError=inherit TTYReset=no TTYVHangup=no TTYVTDisallocate=no SyslogPriority=30 SyslogLevelPrefix=yes SyslogLevel=6 SyslogFacility=3 SecureBits=0 CapabilityBoundingSet=18446744073709551615 AmbientCapabilities=0 DynamicUser=no RemoveIPC=no MountFlags=0 PrivateTmp=no PrivateDevices=no ProtectKernelTunables=no ProtectKernelModules=no ProtectControlGroups=no PrivateNetwork=no PrivateUsers=no ProtectHome=no ProtectSystem=no SameProcessGroup=yes UtmpMode=init IgnoreSIGPIPE=yes NoNewPrivileges=no SystemCallErrorNumber=0 RuntimeDirectoryMode=0755 MemoryDenyWriteExecute=no RestrictRealtime=no KillMode=control-group KillSignal=15 SendSIGKILL=yes SendSIGHUP=no Id=tmp.mount Names=tmp.mount Requires=-.mount system.slice RequiredBy=systemd-timesyncd.service local-fs.target systemd-resolved.service WantedBy=basic.target Conflicts=umount.target Before=umount.target basic.target systemd-timesyncd.service systemd-resolved.service local-fs.target After=system.slice -.mount local-fs-pre.target RequiresMountsFor=/ Documentation=man:fstab(5) man:systemd-fstab-generator(8) Description=/tmp LoadState=loaded ActiveState=active SubState=mounted FragmentPath=/run/systemd/generator/tmp.mount SourcePath=/etc/fstab UnitFileState=generated UnitFilePreset=enabled StateChangeTimestamp=Sun 2017-01-15 22:07:46 CET StateChangeTimestampMonotonic=6594662 InactiveExitTimestamp=Sun 2017-01-15 22:07:46 CET InactiveExitTimestampMonotonic=6587234 ActiveEnterTimestamp=Sun 2017-01-15 22:07:46 CET ActiveEnterTimestampMonotonic=6593838 ActiveExitTimestampMonotonic=0 InactiveEnterTimestampMonotonic=0 CanStart=yes CanStop=yes CanReload=yes CanIsolate=no StopWhenUnneeded=no RefuseManualStart=no RefuseManualStop=no AllowIsolate=no DefaultDependencies=yes OnFailureJobMode=replace IgnoreOnIsolate=yes NeedDaemonReload=no JobTimeoutUSec=infinity JobTimeoutAction=none ConditionResult=yes AssertResult=yes ConditionTimestamp=Sun 2017-01-15 22:07:46 CET ConditionTimestampMonotonic=6584057 AssertTimestamp=Sun 2017-01-15 22:07:46 CET AssertTimestampMonotonic=6584058 Transient=no Perpetual=no StartLimitIntervalSec=10000000 StartLimitBurst=5 StartLimitAction=none InvocationID=c1fb609db44541d2a31fd50a5822c6ac
