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    cgroups: make swap accounting default behavior configurable · a42c390c
    Michal Hocko 提交于
    Swap accounting can be configured by CONFIG_CGROUP_MEM_RES_CTLR_SWAP
    configuration option and then it is turned on by default.  There is a boot
    option (noswapaccount) which can disable this feature.
    
    This makes it hard for distributors to enable the configuration option as
    this feature leads to a bigger memory consumption and this is a no-go for
    general purpose distribution kernel.  On the other hand swap accounting
    may be very usuful for some workloads.
    
    This patch adds a new configuration option which controls the default
    behavior (CGROUP_MEM_RES_CTLR_SWAP_ENABLED).  If the option is selected
    then the feature is turned on by default.
    
    It also adds a new boot parameter swapaccount[=1|0] which enhances the
    original noswapaccount parameter semantic by means of enable/disable logic
    (defaults to 1 if no value is provided to be still consistent with
    noswapaccount).
    
    The default behavior is unchanged (if CONFIG_CGROUP_MEM_RES_CTLR_SWAP is
    enabled then CONFIG_CGROUP_MEM_RES_CTLR_SWAP_ENABLED is enabled as well)
    Signed-off-by: NMichal Hocko <mhocko@suse.cz>
    Acked-by: NDaisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
    Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
    Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
    a42c390c
Kconfig 40.8 KB