• Jerome Marchand's avatar
    mm: add overcommit_kbytes sysctl variable · 49f0ce5f
    Jerome Marchand authored
    Some applications that run on HPC clusters are designed around the
    availability of RAM and the overcommit ratio is fine tuned to get the
    maximum usage of memory without swapping.  With growing memory, the
    1%-of-all-RAM grain provided by overcommit_ratio has become too coarse
    for these workload (on a 2TB machine it represents no less than 20GB).
    
    This patch adds the new overcommit_kbytes sysctl variable that allow a
    much finer grain.
    
    [akpm@linux-foundation.org: coding-style fixes]
    [akpm@linux-foundation.org: fix nommu build]
    Signed-off-by: default avatarJerome Marchand <jmarchan@redhat.com>
    Cc: Dave Hansen <dave.hansen@linux.intel.com>
    Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    49f0ce5f