khugepaged: introduce 'max_ptes_shared' tunable
'max_ptes_shared' specifies how many pages can be shared across multiple processes. Exceeding the number would block the collapse:: /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_shared A higher value may increase memory footprint for some workloads. By default, at least half of pages has to be not shared. [colin.king@canonical.com: fix several spelling mistakes] Link: http://lkml.kernel.org/r/20200420084241.65433-1-colin.king@canonical.com Signed-off-by:Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Tested-by:
Zi Yan <ziy@nvidia.com> Reviewed-by:
William Kucharski <william.kucharski@oracle.com> Reviewed-by:
Zi Yan <ziy@nvidia.com> Acked-by:
Yang Shi <yang.shi@linux.alibaba.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Ralph Campbell <rcampbell@nvidia.com> Link: http://lkml.kernel.org/r/20200416160026.16538-9-kirill.shutemov@linux.intel.com Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
parent
3917c802
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