• Aneesh Kumar K.V's avatar
    hugetlb: rename max_hstate to hugetlb_max_hstate · 47d38344
    Aneesh Kumar K.V authored
    This patchset implements a cgroup resource controller for HugeTLB pages.
    The controller allows to limit the HugeTLB usage per control group and
    enforces the controller limit during page fault.  Since HugeTLB doesn't
    support page reclaim, enforcing the limit at page fault time implies that,
    the application will get SIGBUS signal if it tries to access HugeTLB pages
    beyond its limit.  This requires the application to know beforehand how
    much HugeTLB pages it would require for its use.
    
    The goal is to control how many HugeTLB pages a group of task can
    allocate.  It can be looked at as an extension of the existing quota
    interface which limits the number of HugeTLB pages per hugetlbfs
    superblock.  HPC job scheduler requires jobs to specify their resource
    requirements in the job file.  Once their requirements can be met, job
    schedulers like (SLURM) will schedule the job.  We need to make sure that
    the jobs won't consume more resources than requested.  If they do we
    should either error out or kill the application.
    
    This patch:
    
    Rename max_hstate to hugetlb_max_hstate.  We will be using this from other
    subsystems like hugetlb controller in later patches.
    Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
    Acked-by: default avatarDavid Rientjes <rientjes@google.com>
    Reviewed-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Acked-by: default avatarHillf Danton <dhillf@gmail.com>
    Acked-by: default avatarMichal Hocko <mhocko@suse.cz>
    Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    47d38344
hugetlb.c 79.3 KB